Revert "Balder/group multiple commits rebased 1"

23 files changed, 424 insertions, 911 deletions

diff --git a/searchcore/src/tests/proton/documentdb/feedhandler/feedhandler_test.cpp b/searchcore/src/tests/proton/documentdb/feedhandler/feedhandler_test.cpp
index e56271b3d5a..b8ffc41d3cd 100644
--- a/searchcore/src/tests/proton/documentdb/feedhandler/feedhandler_test.cpp
+++ b/searchcore/src/tests/proton/documentdb/feedhandler/feedhandler_test.cpp
@@ -9,6 +9,7 @@
 #include <vespa/searchcore/proton/feedoperation/putoperation.h>
 #include <vespa/searchcore/proton/feedoperation/removeoperation.h>
 #include <vespa/searchcore/proton/feedoperation/updateoperation.h>
+#include <vespa/searchcore/proton/feedoperation/wipehistoryoperation.h>
 #include <vespa/searchcore/proton/persistenceengine/i_resource_write_filter.h>
 #include <vespa/searchcore/proton/server/configstore.h>
 #include <vespa/searchcore/proton/server/ddbstate.h>
@@ -17,8 +18,10 @@
 #include <vespa/searchcore/proton/server/i_feed_handler_owner.h>
 #include <vespa/searchcore/proton/server/ireplayconfig.h>
 #include <vespa/searchcore/proton/test/dummy_feed_view.h>
+#include <vespa/searchlib/common/idestructorcallback.h>
 #include <vespa/searchlib/index/docbuilder.h>
 #include <vespa/searchlib/index/dummyfileheadercontext.h>
+#include <vespa/searchlib/transactionlog/translogclient.h>
 #include <vespa/searchlib/transactionlog/translogserver.h>
 #include <vespa/vespalib/testkit/testapp.h>
 #include <vespa/vespalib/util/closuretask.h>
@@ -39,7 +42,6 @@ using search::index::schema::CollectionType;
 using search::index::schema::DataType;
 using vespalib::makeLambdaTask;
 using search::transactionlog::TransLogServer;
-using search::transactionlog::DomainConfig;
 using storage::spi::PartitionId;
 using storage::spi::RemoveResult;
 using storage::spi::Result;
@@ -394,7 +396,7 @@ struct FeedHandlerFixture
     FeedHandler                  handler;
     FeedHandlerFixture()
         : _fileHeaderContext(),
-          tls("mytls", 9016, "mytlsdir", _fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000)),
+          tls("mytls", 9016, "mytlsdir", _fileHeaderContext, 0x10000),
           tlsSpec("tcp/localhost:9016"),
           writeService(),
           schema(),
diff --git a/searchcore/src/tests/proton/server/feedstates_test.cpp b/searchcore/src/tests/proton/server/feedstates_test.cpp
index 5e6cb3fdc14..a6f3496e1ed 100644
--- a/searchcore/src/tests/proton/server/feedstates_test.cpp
+++ b/searchcore/src/tests/proton/server/feedstates_test.cpp
@@ -105,7 +105,7 @@ RemoveOperationContext::RemoveOperationContext(search::SerialNum serial)
 {
     op.serialize(str);
     ConstBufferRef buf(str.c_str(), str.wp());
-    packet.reset(new Packet(0xf000));
+    packet.reset(new Packet());
     packet->add(Packet::Entry(serial, FeedOperation::REMOVE, buf));
 }
 RemoveOperationContext::~RemoveOperationContext() {}
diff --git a/searchcore/src/vespa/searchcore/proton/server/tlcproxy.cpp b/searchcore/src/vespa/searchcore/proton/server/tlcproxy.cpp
index 2aafbc8c2d8..bfc59dee35e 100644
--- a/searchcore/src/vespa/searchcore/proton/server/tlcproxy.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/tlcproxy.cpp
@@ -15,8 +15,9 @@ void TlcProxy::commit(search::SerialNum serialNum, search::transactionlog::Type
                       const vespalib::nbostream &buf, DoneCallback onDone)
 {
     Packet::Entry entry(serialNum, type, vespalib::ConstBufferRef(buf.c_str(), buf.size()));
-    Packet packet(entry.serializedSize());
+    Packet packet;
     packet.add(entry);
+    packet.close();
     _tlsDirectWriter.commit(_domain, packet, std::move(onDone));
 }
 
diff --git a/searchlib/src/tests/transactionlog/translogclient_test.cpp b/searchlib/src/tests/transactionlog/translogclient_test.cpp
index 5b28fdc6567..861023b79b7 100644
--- a/searchlib/src/tests/transactionlog/translogclient_test.cpp
+++ b/searchlib/src/tests/transactionlog/translogclient_test.cpp
@@ -5,6 +5,7 @@
 #include <vespa/vespalib/objects/identifiable.h>
 #include <vespa/searchlib/index/dummyfileheadercontext.h>
 #include <vespa/fastos/file.h>
+#include <map>
 
 #include <vespa/log/log.h>
 LOG_SETUP("translogclient_test");
@@ -44,7 +45,7 @@ private:
     bool partialUpdateTest();
     bool testVisitOverGeneratedDomain();
     bool testRemove();
-    void createAndFillDomain(const vespalib::string & name, Encoding encoding, size_t preExistingDomains);
+    void createAndFillDomain(const vespalib::string & name, DomainPart::Crc crcMethod, size_t preExistingDomains);
     void verifyDomain(const vespalib::string & name);
     void testCrcVersions();
     bool testVisitOverPreExistingDomain();
@@ -220,12 +221,11 @@ public:
 
 IMPLEMENT_IDENTIFIABLE(TestIdentifiable, Identifiable);
 
-constexpr size_t DEFAULT_PACKET_SIZE = 0xf000;
 bool Test::partialUpdateTest()
 {
     bool retval(false);
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, 0x10000);
     TransLogClient tls("tcp/localhost:18377");
 
     TransLogClient::Session::UP s1 = openDomainTest(tls, "test1");
@@ -239,8 +239,9 @@ bool Test::partialUpdateTest()
     vespalib::ConstBufferRef bb(os.c_str(), os.size());
     LOG(info, "DU : %s", myhex(bb.c_str(), bb.size()).c_str());
     Packet::Entry e(7, du.getClass().id(), bb);
-    Packet pa(DEFAULT_PACKET_SIZE);
+    Packet pa;
     pa.add(e);
+    pa.close();
     ASSERT_TRUE(session.commit(vespalib::ConstBufferRef(pa.getHandle().c_str(), pa.getHandle().size())));
 
     CallBackUpdate ca;
@@ -311,24 +312,29 @@ bool Test::fillDomainTest(TransLogClient::Session * s1, const vespalib::string &
     Packet::Entry e2(2, 2, vespalib::ConstBufferRef("Content in buffer B", 20));
     Packet::Entry e3(3, 1, vespalib::ConstBufferRef("Content in buffer C", 20));
 
-    Packet a(DEFAULT_PACKET_SIZE);
-    a.add(e1);
-    Packet b(DEFAULT_PACKET_SIZE);
-    b.add(e2);
-    b.add(e3);
-    EXPECT_EXCEPTION(b.add(e1), std::runtime_error, "");
+    Packet a;
+    ASSERT_TRUE (a.add(e1));
+    Packet b;
+    ASSERT_TRUE (b.add(e2));
+    ASSERT_TRUE (b.add(e3));
+    ASSERT_TRUE (!b.add(e1));
+    a.close();
+    b.close();
     ASSERT_TRUE (s1->commit(vespalib::ConstBufferRef(a.getHandle().c_str(), a.getHandle().size())));
     ASSERT_TRUE (s1->commit(vespalib::ConstBufferRef(b.getHandle().c_str(), b.getHandle().size())));
-    EXPECT_EXCEPTION(s1->commit(vespalib::ConstBufferRef(a.getHandle().c_str(), a.getHandle().size())),
-                     std::runtime_error,
-                     "commit failed with code -2. server says: Exception during commit on " + name + " : Incomming serial number(1) must be bigger than the last one (3).");
+    try {
+        s1->commit(vespalib::ConstBufferRef(a.getHandle().c_str(), a.getHandle().size()));
+        ASSERT_TRUE(false);
+    } catch (const std::exception & e) {
+        EXPECT_EQUAL(vespalib::string("commit failed with code -2. server says: Exception during commit on " + name + " : Incomming serial number(1) must be bigger than the last one (3)."), e.what());
+    }
     EXPECT_EQUAL(a.size(), 1u);
     EXPECT_EQUAL(a.range().from(), 1u);
     EXPECT_EQUAL(a.range().to(), 1u);
     EXPECT_EQUAL(b.size(), 2u);
     EXPECT_EQUAL(b.range().from(), 2u);
     EXPECT_EQUAL(b.range().to(), 3u);
-    a.merge(b);
+    EXPECT_TRUE(a.merge(b));
     EXPECT_EQUAL(a.size(), 3u);
     EXPECT_EQUAL(a.range().from(), 1u);
     EXPECT_EQUAL(a.range().to(), 3u);
@@ -347,35 +353,41 @@ void Test::fillDomainTest(TransLogClient::Session * s1, size_t numPackets, size_
 {
     size_t value(0);
     for(size_t i=0; i < numPackets; i++) {
-        std::unique_ptr<Packet> p(new Packet(DEFAULT_PACKET_SIZE));
+        std::unique_ptr<Packet> p(new Packet());
         for(size_t j=0; j < numEntries; j++, value++) {
             Packet::Entry e(value+1, j+1, vespalib::ConstBufferRef((const char *)&value, sizeof(value)));
-            p->add(e);
-            if ( p->sizeBytes() > DEFAULT_PACKET_SIZE ) {
+            if ( ! p->add(e) ) {
+                p->close();
                 ASSERT_TRUE(s1->commit(vespalib::ConstBufferRef(p->getHandle().c_str(), p->getHandle().size())));
-                p.reset(new Packet(DEFAULT_PACKET_SIZE));
+                p.reset(new Packet());
+                ASSERT_TRUE(p->add(e));
             }
         }
+        p->close();
         ASSERT_TRUE(s1->commit(vespalib::ConstBufferRef(p->getHandle().c_str(), p->getHandle().size())));
     }
 }
 
 
 void
-Test::fillDomainTest(TransLogClient::Session * s1, size_t numPackets, size_t numEntries, size_t entrySize)
+Test::fillDomainTest(TransLogClient::Session * s1,
+                     size_t numPackets, size_t numEntries,
+                     size_t entrySize)
 {
     size_t value(0);
     std::vector<char> entryBuffer(entrySize); 
     for(size_t i=0; i < numPackets; i++) {
-        std::unique_ptr<Packet> p(new Packet(DEFAULT_PACKET_SIZE));
+        std::unique_ptr<Packet> p(new Packet());
         for(size_t j=0; j < numEntries; j++, value++) {
             Packet::Entry e(value+1, j+1, vespalib::ConstBufferRef((const char *)&entryBuffer[0], entryBuffer.size()));
-            p->add(e);
-            if ( p->sizeBytes() > DEFAULT_PACKET_SIZE ) {
+            if ( ! p->add(e) ) {
+                p->close();
                 ASSERT_TRUE(s1->commit(vespalib::ConstBufferRef(p->getHandle().c_str(), p->getHandle().size())));
-                p.reset(new Packet(DEFAULT_PACKET_SIZE));
+                p.reset(new Packet());
+                ASSERT_TRUE(p->add(e));
             }
         }
+        p->close();
         ASSERT_TRUE(s1->commit(vespalib::ConstBufferRef(p->getHandle().c_str(), p->getHandle().size())));
     }
 }
@@ -398,7 +410,8 @@ Test::countFiles(const vespalib::string &dir)
 
 
 void
-Test::checkFilledDomainTest(const TransLogClient::Session::UP &s1, size_t numEntries)
+Test::checkFilledDomainTest(const TransLogClient::Session::UP &s1,
+                            size_t numEntries)
 {
     SerialNum b(0), e(0);
     size_t c(0);
@@ -476,7 +489,7 @@ getMaxSessionRunTime(TransLogServer &tls, const vespalib::string &domain)
 bool Test::testVisitOverGeneratedDomain()
 {
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, 0x10000);
     TransLogClient tls("tcp/localhost:18377");
 
     vespalib::string name("test1");
@@ -491,11 +504,10 @@ bool Test::testVisitOverGeneratedDomain()
     return true;
 }
 
-void Test::createAndFillDomain(const vespalib::string & name, Encoding encoding, size_t preExistingDomains)
+void Test::createAndFillDomain(const vespalib::string & name, DomainPart::Crc crcMethod, size_t preExistingDomains)
 {
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test13", 18377, ".", fileHeaderContext,
-                        DomainConfig().setPartSizeLimit(0x1000000).setEncoding(encoding), 4);
+    TransLogServer tlss("test13", 18377, ".", fileHeaderContext, 0x10000, 4, crcMethod);
     TransLogClient tls("tcp/localhost:18377");
 
     createDomainTest(tls, name, preExistingDomains);
@@ -506,7 +518,7 @@ void Test::createAndFillDomain(const vespalib::string & name, Encoding encoding,
 void Test::verifyDomain(const vespalib::string & name)
 {
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test13", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x1000000));
+    TransLogServer tlss("test13", 18377, ".", fileHeaderContext, 0x10000);
     TransLogClient tls("tcp/localhost:18377");
     TransLogClient::Session::UP s1 = openDomainTest(tls, name);
     visitDomainTest(tls, s1.get(), name);
@@ -514,8 +526,8 @@ void Test::verifyDomain(const vespalib::string & name)
 
 void Test::testCrcVersions()
 {
-    createAndFillDomain("ccitt_crc32", Encoding::Crc::ccitt_crc32, 0);
-    createAndFillDomain("xxh64", Encoding::Crc::xxh64, 1);
+    createAndFillDomain("ccitt_crc32", DomainPart::ccitt_crc32, 0);
+    createAndFillDomain("xxh64", DomainPart::xxh64, 1);
 
     verifyDomain("ccitt_crc32");
     verifyDomain("xxh64");
@@ -524,7 +536,7 @@ void Test::testCrcVersions()
 bool Test::testRemove()
 {
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("testremove", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+    TransLogServer tlss("testremove", 18377, ".", fileHeaderContext, 0x10000);
     TransLogClient tls("tcp/localhost:18377");
 
     vespalib::string name("test-delete");
@@ -541,7 +553,7 @@ bool Test::testVisitOverPreExistingDomain()
 {
     // Depends on Test::testVisitOverGeneratedDomain()
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+    TransLogServer tlss("test7", 18377, ".", fileHeaderContext, 0x10000);
     TransLogClient tls("tcp/localhost:18377");
 
     vespalib::string name("test1");
@@ -595,7 +607,7 @@ void Test::testMany()
     const unsigned int TOTAL_NUM_ENTRIES = NUM_PACKETS * NUM_ENTRIES;
     {
         DummyFileHeaderContext fileHeaderContext;
-        TransLogServer tlss("test8", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x80000));
+        TransLogServer tlss("test8", 18377, ".", fileHeaderContext, 0x80000);
         TransLogClient tls("tcp/localhost:18377");
 
         createDomainTest(tls, "many", 0);
@@ -618,7 +630,7 @@ void Test::testMany()
     }
     {
         DummyFileHeaderContext fileHeaderContext;
-        TransLogServer tlss("test8", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x1000000));
+        TransLogServer tlss("test8", 18377, ".", fileHeaderContext, 0x1000000);
         TransLogClient tls("tcp/localhost:18377");
 
         TransLogClient::Session::UP s1 = openDomainTest(tls, "many");
@@ -646,7 +658,7 @@ void Test::testErase()
     const unsigned int TOTAL_NUM_ENTRIES = NUM_PACKETS * NUM_ENTRIES;
     {
         DummyFileHeaderContext fileHeaderContext;
-        TransLogServer tlss("test12", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x80000));
+        TransLogServer tlss("test12", 18377, ".", fileHeaderContext, 0x80000);
         TransLogClient tls("tcp/localhost:18377");
 
         createDomainTest(tls, "erase", 0);
@@ -655,7 +667,7 @@ void Test::testErase()
     }
     {
         DummyFileHeaderContext fileHeaderContext;
-        TransLogServer tlss("test12", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x1000000));
+        TransLogServer tlss("test12", 18377, ".", fileHeaderContext, 0x1000000);
         TransLogClient tls("tcp/localhost:18377");
 
         TransLogClient::Session::UP s1 = openDomainTest(tls, "erase");
@@ -745,7 +757,7 @@ Test::testSync()
     const unsigned int TOTAL_NUM_ENTRIES = NUM_PACKETS * NUM_ENTRIES;
 
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tlss("test9", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x1000000));
+    TransLogServer tlss("test9", 18377, ".", fileHeaderContext, 0x1000000);
     TransLogClient tls("tcp/localhost:18377");
 
     createDomainTest(tls, "sync", 0);
@@ -770,7 +782,7 @@ Test::testTruncateOnVersionMismatch()
     size_t countOld(0);
     DummyFileHeaderContext fileHeaderContext;
     {
-        TransLogServer tlss("test11", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x1000000));
+        TransLogServer tlss("test11", 18377, ".", fileHeaderContext, 0x1000000);
         TransLogClient tls("tcp/localhost:18377");
 
         createDomainTest(tls, "sync", 0);
@@ -791,7 +803,7 @@ Test::testTruncateOnVersionMismatch()
     EXPECT_EQUAL(static_cast<ssize_t>(sizeof(tmp)), f.Write2(tmp, sizeof(tmp)));
     EXPECT_TRUE(f.Close());
     {
-        TransLogServer tlss("test11", 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+        TransLogServer tlss("test11", 18377, ".", fileHeaderContext, 0x1000000);
         TransLogClient tls("tcp/localhost:18377");
         TransLogClient::Session::UP s1 = openDomainTest(tls, "sync");
         uint64_t from(0), to(0);
@@ -817,7 +829,7 @@ Test::testTruncateOnShortRead()
 
     DummyFileHeaderContext fileHeaderContext;
     {
-        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, 0x10000);
         TransLogClient tls(tlsspec);
         
         createDomainTest(tls, domain, 0);
@@ -833,7 +845,7 @@ Test::testTruncateOnShortRead()
         EXPECT_EQUAL(2u, countFiles(dir));
     }
     {
-        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, 0x10000);
         TransLogClient tls(tlsspec);
         TransLogClient::Session::UP s1 = openDomainTest(tls, domain);
         checkFilledDomainTest(s1, TOTAL_NUM_ENTRIES);
@@ -849,7 +861,7 @@ Test::testTruncateOnShortRead()
         trfile.Close();
     }
     {
-        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(0x10000));
+        TransLogServer tlss(topdir, 18377, ".", fileHeaderContext, 0x10000);
         TransLogClient tls(tlsspec);
         TransLogClient::Session::UP s1 = openDomainTest(tls, domain);
         checkFilledDomainTest(s1, TOTAL_NUM_ENTRIES - 1);
diff --git a/searchlib/src/tests/transactionlogstress/translogstress.cpp b/searchlib/src/tests/transactionlogstress/translogstress.cpp
index 6f2581d3799..abba84b75b6 100644
--- a/searchlib/src/tests/transactionlogstress/translogstress.cpp
+++ b/searchlib/src/tests/transactionlogstress/translogstress.cpp
@@ -8,6 +8,7 @@
 #include <vespa/searchlib/index/dummyfileheadercontext.h>
 #include <vespa/fastos/app.h>
 #include <iostream>
+#include <stdexcept>
 #include <sstream>
 
 #include <vespa/log/log.h>
@@ -220,6 +221,7 @@ FeederThread::~FeederThread() {}
 void
 FeederThread::commitPacket()
 {
+    _packet.close();
     const vespalib::nbostream& stream = _packet.getHandle();
     if (!_session->commit(ConstBufferRef(stream.c_str(), stream.size()))) {
         throw std::runtime_error(vespalib::make_string
@@ -234,9 +236,8 @@ FeederThread::commitPacket()
 bool
 FeederThread::addEntry(const Packet::Entry & e)
 {
-    if (_packet.sizeBytes() > 0xf000) return false;
-    _packet.add(e);
-    return true;
+    //LOG(info, "FeederThread: add %s", EntryPrinter::toStr(e).c_str());
+    return _packet.add(e);
 }
 
 void
@@ -698,7 +699,7 @@ TransLogStress::Main()
 
     // start transaction log server
     DummyFileHeaderContext fileHeaderContext;
-    TransLogServer tls("server", 17897, ".", fileHeaderContext, DomainConfig().setPartSizeLimit(_cfg.domainPartSize));
+    TransLogServer tls("server", 17897, ".", fileHeaderContext, _cfg.domainPartSize);
     TransLogClient client(tlsSpec);
     client.create(domain);
 
diff --git a/searchlib/src/vespa/searchlib/config/translogserver.def b/searchlib/src/vespa/searchlib/config/translogserver.def
index b1bdb3765b1..74efe3fe68e 100644
--- a/searchlib/src/vespa/searchlib/config/translogserver.def
+++ b/searchlib/src/vespa/searchlib/config/translogserver.def
@@ -5,7 +5,7 @@ namespace=searchlib
 listenport int default=13700 restart
 
 ## Max file size (50M)
-filesizemax int default=50000000
+filesizemax int default=50000000 restart
 
 ## Server name to identify server.
 servername string default="tls" restart
@@ -22,17 +22,3 @@ maxthreads int default=4 restart
 
 ##Default crc method used
 crcmethod enum {ccitt_crc32, xxh64} default=xxh64
-
-## Control compression type.
-compression.type enum {NONE, LZ4, ZSTD} default=LZ4
-
-## Control compression level
-## LZ4 has normal range 1..9 while ZSTD has range 1..19
-## 9 is a reasonable default for both
-compression.level int default=9
-
-## How large a chunk can grow in memory before beeing flushed
-chunk.sizelimit int default = 256000  # 256k
-
-## How long a chunk can reside in memory befor ebeeing flushed to disk.
-chunk.agelimit double default = 0.0010 # 10 milliseconds
diff --git a/searchlib/src/vespa/searchlib/transactionlog/CMakeLists.txt b/searchlib/src/vespa/searchlib/transactionlog/CMakeLists.txt
index 0755d07b403..d964c88fe29 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/CMakeLists.txt
+++ b/searchlib/src/vespa/searchlib/transactionlog/CMakeLists.txt
@@ -1,11 +1,9 @@
 # Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 vespa_add_library(searchlib_transactionlog OBJECT
     SOURCES
-    chunks.cpp
     common.cpp
     domain.cpp
     domainpart.cpp
-    ichunk.cpp
     nosyncproxy.cpp
     session.cpp
     trans_log_server_explorer.cpp
diff --git a/searchlib/src/vespa/searchlib/transactionlog/chunks.cpp b/searchlib/src/vespa/searchlib/transactionlog/chunks.cpp
deleted file mode 100644
index dea0ccf9b9a..00000000000
--- a/searchlib/src/vespa/searchlib/transactionlog/chunks.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-
-#include "chunks.h"
-#include <vespa/vespalib/util/stringfmt.h>
-#include <vespa/vespalib/util/compressor.h>
-#include <vespa/vespalib/data/databuffer.h>
-
-using std::runtime_error;
-using std::make_unique;
-using vespalib::make_string;
-using vespalib::compression::compress;
-using vespalib::compression::decompress;
-using vespalib::compression::CompressionConfig;
-using vespalib::DataBuffer;
-using vespalib::ConstBufferRef;
-using vespalib::nbostream;
-
-namespace search::transactionlog {
-
-namespace {
-void verifyCrc(nbostream & is, Encoding::Crc crcType) {
-    if (is.size() < sizeof(int32_t) * 2) {
-        throw runtime_error(make_string("Not even room for the crc and length. Only %zu bytes left", is.size()));
-    }
-    size_t start = is.rp();
-    is.adjustReadPos(is.size() - sizeof(int32_t));
-    int32_t crc(0);
-    is >> crc;
-    is.rp(start);
-    int32_t crcVerify = Encoding::calcCrc(crcType, is.c_str(), is.size() - sizeof(crc));
-    if (crc != crcVerify) {
-        throw runtime_error(make_string("Got bad crc : crcVerify = %d, expected %d",
-                                        static_cast<int>(crcVerify), static_cast<int>(crc)));
-    }
-    is.rp(start);
-}
-
-Encoding::Compression
-toCompression(CompressionConfig::Type type) {
-    switch (type) {
-        case CompressionConfig::ZSTD:
-            return Encoding::Compression::zstd;
-        case CompressionConfig::LZ4:
-            return Encoding::Compression::lz4;
-        case CompressionConfig::NONE:
-            return Encoding::Compression::none;
-        default:
-            abort();
-    }
-}
-
-}
-
-Encoding
-CCITTCRC32None::onEncode(nbostream &os) const {
-    size_t start = os.wp();
-    assert(getEntries().size() == 1);
-    serializeEntries(os);
-    os << int32_t(Encoding::calcCrc(Encoding::Crc::ccitt_crc32, os.c_str()+start, os.size() - start));
-    return Encoding(Encoding::Crc::ccitt_crc32, Encoding::Compression::none);
-}
-
-void CCITTCRC32None::onDecode(nbostream &is) {
-    verifyCrc(is, Encoding::Crc::ccitt_crc32);
-    nbostream data(is.peek(), is.size() - sizeof(int32_t));
-    deserializeEntries(data);
-    is.adjustReadPos(is.size());
-}
-
-Encoding
-XXH64None::onEncode(nbostream &os) const {
-    size_t start = os.wp();
-    assert(getEntries().size() == 1);
-    serializeEntries(os);
-    os << int32_t(Encoding::calcCrc(Encoding::Crc::xxh64, os.c_str()+start, os.size() - start));
-    return Encoding(Encoding::Crc::xxh64, Encoding::Compression::none);
-}
-
-void XXH64None::onDecode(nbostream &is) {
-    verifyCrc(is, Encoding::Crc::xxh64);
-    nbostream data(is.peek(), is.size() - sizeof(int32_t));
-    deserializeEntries(data);
-    is.adjustReadPos(is.size());
-}
-
-void
-XXH64Compressed::decompress(nbostream & is) {
-    uint32_t uncompressedLen;
-    is >> uncompressedLen;
-    vespalib::DataBuffer uncompressed;
-    ConstBufferRef compressed(is.peek(), is.size()-sizeof(uint32_t)*2);
-    ::decompress(_type, uncompressedLen, compressed, uncompressed, false);
-    nbostream data(uncompressed.getData(), uncompressed.getDataLen());
-    deserializeEntries(data);
-    is.adjustReadPos(is.size());
-}
-
-XXH64Compressed::XXH64Compressed(CompressionConfig::Type type, uint8_t level)
-    : _type(type),
-      _level(level)
-{ }
-
-Encoding
-XXH64Compressed::compress(nbostream & os, Encoding::Crc crc) const {
-    nbostream org;
-    serializeEntries(org);
-    DataBuffer compressed;
-    CompressionConfig cfg(_type, _level, 80);
-    ConstBufferRef uncompressed(org.c_str(), org.size());
-    Encoding::Compression actual = toCompression(::compress(cfg, uncompressed, compressed, false));
-    size_t start = os.wp();
-    os.write(compressed.getData(), compressed.getDataLen());
-    os << int32_t(Encoding::calcCrc(crc, os.c_str()+start, os.size() - start));
-    return Encoding(Encoding::Crc::xxh64, actual);
-}
-
-Encoding
-XXH64Compressed::onEncode(IChunk::nbostream &os) const {
-    return compress(os, Encoding::Crc::xxh64);
-}
-
-void
-XXH64Compressed::onDecode(IChunk::nbostream &is) {
-    verifyCrc(is, Encoding::Crc::xxh64);
-    decompress(is);
-}
-
-}
diff --git a/searchlib/src/vespa/searchlib/transactionlog/chunks.h b/searchlib/src/vespa/searchlib/transactionlog/chunks.h
deleted file mode 100644
index cf88bc0a3ed..00000000000
--- a/searchlib/src/vespa/searchlib/transactionlog/chunks.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-
-#pragma once
-
-#include "ichunk.h"
-#include <vespa/vespalib/util/compressionconfig.h>
-
-namespace search::transactionlog {
-
-class XXH64None : public IChunk {
-protected:
-    Encoding onEncode(nbostream &os) const override;
-    void onDecode(nbostream &is) override;
-public:
-};
-
-class CCITTCRC32None : public IChunk {
-protected:
-    Encoding onEncode(nbostream &os) const override;
-    void onDecode(nbostream &is) override;
-public:
-};
-
-class XXH64Compressed : public IChunk {
-public:
-    using CompressionConfig = vespalib::compression::CompressionConfig;
-    XXH64Compressed(CompressionConfig::Type, uint8_t level);
-protected:
-    void decompress(nbostream & os);
-    Encoding compress(nbostream & os, Encoding::Crc crc) const;
-    Encoding onEncode(nbostream &os) const override;
-    void onDecode(nbostream &is) override;
-private:
-    CompressionConfig::Type _type;
-    uint8_t                 _level;
-};
-
-}
diff --git a/searchlib/src/vespa/searchlib/transactionlog/common.cpp b/searchlib/src/vespa/searchlib/transactionlog/common.cpp
index 9bf43c8e244..a84e27b2e53 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/common.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/common.cpp
@@ -1,29 +1,14 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 
 #include "common.h"
-#include <vespa/vespalib/util/stringfmt.h>
 #include <vespa/fastos/file.h>
 
 namespace search::transactionlog {
 
 using vespalib::nbostream;
 using vespalib::nbostream_longlivedbuf;
-using vespalib::make_string;
-using std::runtime_error;
 
-namespace {
-
-void throwRangeError(SerialNum prev, SerialNum next) __attribute__((noinline));
-
-void throwRangeError(SerialNum prev, SerialNum next) {
-    if (prev < next) return;
-    throw runtime_error(make_string("The new serialnum %zu is not higher than the old one %zu", next, prev));
-}
-
-}
-
-int
-makeDirectory(const char * dir)
+int makeDirectory(const char * dir)
 {
     int retval(-1);
 
@@ -37,8 +22,7 @@ makeDirectory(const char * dir)
     return retval;
 }
 
-int64_t
-SerialNumRange::cmp(const SerialNumRange & b) const
+int64_t SerialNumRange::cmp(const SerialNumRange & b) const
 {
     int64_t diff(0);
     if ( ! (contains(b) || b.contains(*this)) ) {
@@ -50,6 +34,7 @@ SerialNumRange::cmp(const SerialNumRange & b) const
 Packet::Packet(const void * buf, size_t sz) :
      _count(0),
      _range(),
+     _limit(sz),
      _buf(static_cast<const char *>(buf), sz)
 {
     nbostream_longlivedbuf os(_buf.c_str(), sz);
@@ -64,22 +49,18 @@ Packet::Packet(const void * buf, size_t sz) :
     }
 }
 
-void
-Packet::merge(const Packet & packet)
+bool Packet::merge(const Packet & packet)
 {
-    if (_range.to() >= packet.range().from()) {
-        throwRangeError(_range.to(), packet.range().from());
-    }
-    if (_buf.empty()) {
-        _range.from(packet.range().from());
+    bool retval(_range.to() < packet._range.from());
+    if (retval) {
+        _count += packet._count;
+        _range.to(packet._range.to());
+        _buf.write(packet.getHandle().c_str(), packet.getHandle().size());
     }
-    _count += packet._count;
-    _range.to(packet._range.to());
-    _buf.write(packet.getHandle().c_str(), packet.getHandle().size());
+    return retval;
 }
 
-nbostream &
-Packet::Entry::deserialize(nbostream & os)
+nbostream & Packet::Entry::deserialize(nbostream & os)
 {
     _valid = false;
     int32_t len(0);
@@ -90,8 +71,7 @@ Packet::Entry::deserialize(nbostream & os)
     return os;
 }
 
-nbostream &
-Packet::Entry::serialize(nbostream & os) const
+nbostream & Packet::Entry::serialize(nbostream & os) const
 {
     os << _unique << _type << static_cast<uint32_t>(_data.size());
     os.write(_data.c_str(), _data.size());
@@ -103,21 +83,22 @@ Packet::Entry::Entry(SerialNum u, Type t, const vespalib::ConstBufferRef & d) :
     _type(t),
     _valid(true),
     _data(d)
-{ }
-
-void
-Packet::add(const Packet::Entry & e)
 {
-    if (_range.to() >= e.serial()) {
-        throwRangeError(_range.to(), e.serial());
-    }
+}
+
 
-    if (_buf.empty()) {
-        _range.from(e.serial());
+bool Packet::add(const Packet::Entry & e)
+{
+    bool retval((_buf.size() < _limit) && (_range.to() < e.serial()));
+    if (retval) {
+        if (_buf.empty()) {
+            _range.from(e.serial());
+        }
+        e.serialize(_buf);
+        _count++;
+        _range.to(e.serial());
     }
-    e.serialize(_buf);
-    _count++;
-    _range.to(e.serial());
+    return retval;
 }
 
 }
diff --git a/searchlib/src/vespa/searchlib/transactionlog/common.h b/searchlib/src/vespa/searchlib/transactionlog/common.h
index 0deceb2668a..db8b9727daa 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/common.h
+++ b/searchlib/src/vespa/searchlib/transactionlog/common.h
@@ -69,19 +69,21 @@ public:
         vespalib::ConstBufferRef _data;
     };
 public:
-    Packet(size_t reserved) : _count(0), _range(), _buf(reserved) { }
+    Packet(size_t m=0xf000) : _count(0), _range(), _limit(m), _buf(m) { }
     Packet(const void * buf, size_t sz);
-    void add(const Entry & data);
+    bool add(const Entry & data);
+    void close() { }
     void clear() { _buf.clear(); _count = 0; _range.from(0); _range.to(0); }
     const SerialNumRange & range() const { return _range; }
     const vespalib::nbostream & getHandle() const { return _buf; }
     size_t                  size() const { return _count; }
     bool                   empty() const { return _count == 0; }
     size_t             sizeBytes() const { return _buf.size(); }
-    void merge(const Packet & packet);
+    bool merge(const Packet & packet);
 private:
     size_t                            _count;
     SerialNumRange                    _range;
+    size_t                            _limit;
     vespalib::nbostream_longlivedbuf  _buf;
 };
 
diff --git a/searchlib/src/vespa/searchlib/transactionlog/domain.cpp b/searchlib/src/vespa/searchlib/transactionlog/domain.cpp
index c03543e5599..88c2dd9ecc3 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/domain.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/domain.cpp
@@ -20,41 +20,28 @@ using vespalib::MonitorGuard;
 using search::common::FileHeaderContext;
 using std::runtime_error;
 using namespace std::chrono_literals;
-using namespace std::chrono;
-using std::make_shared;
 
 namespace search::transactionlog {
 
-DomainConfig::DomainConfig()
-    : _encoding(Encoding::Crc::xxh64, Encoding::Compression::none),
-      _compressionLevel(9),
-      _partSizeLimit(0x10000000), // 256M
-      _chunkSizeLimit(0x40000),   // 256k
-      _chunkAgeLimit(1ms)
-{ }
-Domain::Domain(const string &domainName, const string & baseDir, FastOS_ThreadPool & threadPool,
-               Executor & commitExecutor, Executor & sessionExecutor, const DomainConfig & cfg,
-               const FileHeaderContext &fileHeaderContext)
-    : _config(cfg),
-      _currentChunk(std::make_unique<Chunk>()),
-      _lastSerial(0),
-      _threadPool(threadPool),
-      _commitExecutor(commitExecutor),
-      _sessionExecutor(sessionExecutor),
-      _sessionId(1),
-      _syncMonitor(),
-      _pendingSync(false),
-      _name(domainName),
-      _parts(),
-      _lock(),
-      _currentChunkMonitor(),
-      _sessionLock(),
-      _sessions(),
-      _maxSessionRunTime(),
-      _baseDir(baseDir),
-      _fileHeaderContext(fileHeaderContext),
-      _markedDeleted(false),
-      _self(nullptr)
+Domain::Domain(const string &domainName, const string & baseDir, Executor & commitExecutor,
+               Executor & sessionExecutor, uint64_t domainPartSize, DomainPart::Crc defaultCrcType,
+               const FileHeaderContext &fileHeaderContext) :
+    _defaultCrcType(defaultCrcType),
+    _commitExecutor(commitExecutor),
+    _sessionExecutor(sessionExecutor),
+    _sessionId(1),
+    _syncMonitor(),
+    _pendingSync(false),
+    _name(domainName),
+    _domainPartSize(domainPartSize),
+    _parts(),
+    _lock(),
+    _sessionLock(),
+    _sessions(),
+    _maxSessionRunTime(),
+    _baseDir(baseDir),
+    _fileHeaderContext(fileHeaderContext),
+    _markedDeleted(false)
 {
     int retval(0);
     if ((retval = makeDirectory(_baseDir.c_str())) != 0) {
@@ -72,32 +59,12 @@ Domain::Domain(const string &domainName, const string & baseDir, FastOS_ThreadPo
     }
     _sessionExecutor.sync();
     if (_parts.empty() || _parts.crbegin()->second->isClosed()) {
-        _parts[lastPart] = make_shared<DomainPart>(_name, dir(), lastPart, _config.getEncoding(),
-                                                   _config.getCompressionlevel(), _fileHeaderContext, false);
+        _parts[lastPart].reset(new DomainPart(_name, dir(), lastPart, _defaultCrcType, _fileHeaderContext, false));
     }
-    _lastSerial = end();
-    _self = _threadPool.NewThread(this);
-    assert(_self);
 }
 
-Domain &
-Domain::setConfig(const DomainConfig & cfg) {
-    _config = cfg;
-    return *this;
-}
-
-void
-Domain::Run(FastOS_ThreadInterface *thisThread, void *) {
-
-    while (!thisThread->GetBreakFlag()) {
-        vespalib::MonitorGuard guard(_currentChunkMonitor);
-        guard.wait(duration_cast<milliseconds>(_config.getChunkAgeLimit()).count());
-        commitIfStale(guard);
-    }
-}
 void Domain::addPart(int64_t partId, bool isLastPart) {
-    auto dp = make_shared<DomainPart>(_name, dir(), partId, _config.getEncoding(),
-                                      _config.getCompressionlevel(), _fileHeaderContext, isLastPart);
+    DomainPart::SP dp(new DomainPart(_name, dir(), partId, _defaultCrcType, _fileHeaderContext, isLastPart));
     if (dp->size() == 0) {
         // Only last domain part is allowed to be truncated down to
         // empty size.
@@ -135,16 +102,7 @@ private:
     bool              & _pendingSync;
 };
 
-Domain::~Domain() {
-    if (_self) {
-        _self->SetBreakFlag();
-        {
-            MonitorGuard guard(_currentChunkMonitor);
-            guard.broadcast();
-        }
-        _self->Join();
-    }
-}
+Domain::~Domain() { }
 
 DomainInfo
 Domain::getDomainInfo() const
@@ -171,7 +129,7 @@ Domain::begin(const LockGuard & guard) const
     assert(guard.locks(_lock));
     SerialNum s(0);
     if ( ! _parts.empty() ) {
-        s = _parts.cbegin()->second->range().from();
+        s = _parts.begin()->second->range().from();
     }
     return s;
 }
@@ -189,7 +147,7 @@ Domain::end(const LockGuard & guard) const
     assert(guard.locks(_lock));
     SerialNum s(0);
     if ( ! _parts.empty() ) {
-        s = _parts.crbegin()->second->range().to();
+        s = _parts.rbegin()->second->range().to();
     }
     return s;
 }
@@ -309,8 +267,7 @@ void Domain::cleanSessions()
 
 namespace {
 
-void
-waitPendingSync(vespalib::Monitor &syncMonitor, bool &pendingSync)
+void waitPendingSync(vespalib::Monitor &syncMonitor, bool &pendingSync)
 {
     MonitorGuard guard(syncMonitor);
     while (pendingSync) {
@@ -320,82 +277,18 @@ waitPendingSync(vespalib::Monitor &syncMonitor, bool &pendingSync)
 
 }
 
-
-Domain::Chunk::Chunk()
-    : _data(size_t(-1)),
-      _callBacks(),
-      _firstArrivalTime()
-{}
-
-Domain::Chunk::~Chunk() = default;
-void
-Domain::Chunk::add(const Packet &packet, Writer::DoneCallback onDone) {
-    if (_callBacks.empty()) {
-        _firstArrivalTime = steady_clock::now();
-    }
-    _data.merge(packet);
-    _callBacks.emplace_back(std::move(onDone));
-}
-
-microseconds
-Domain::Chunk::age() const {
-    if (_callBacks.empty()) {
-        return 0ms;
-    }
-    return duration_cast<microseconds>(steady_clock::now() - _firstArrivalTime);
-}
-
-void
-Domain::commit(const Packet & packet, Writer::DoneCallback onDone) {
-    std::unique_ptr<Chunk> completed;
-    vespalib::MonitorGuard guard(_currentChunkMonitor);
-    if (! (_lastSerial < packet.range().from())) {
-        throw runtime_error(make_string("Incomming serial number(%ld) must be bigger than the last one (%ld).",
-                                        packet.range().from(), _lastSerial));
-    } else {
-        _lastSerial = packet.range().to();
-    }
-    _currentChunk->add(packet, std::move(onDone));
-    if (_currentChunk->sizeBytes() > _config.getChunkSizeLimit()) {
-        completed = grabCurrentChunk(guard);
-    }
-    if (completed) {
-        commitChunk(std::move(_currentChunk), guard);
-    }
-}
-
-std::unique_ptr<Domain::Chunk>
-Domain::grabCurrentChunk(const vespalib::MonitorGuard & guard) {
-    assert(guard.monitors(_currentChunkMonitor));
-    auto chunk = std::move(_currentChunk);
-    _currentChunk = std::make_unique<Chunk>();
-    return chunk;
-}
-
-void
-Domain::commitIfStale(const vespalib::MonitorGuard & guard) {
-    assert(guard.monitors(_currentChunkMonitor));
-    if (_currentChunk->age() > _config.getChunkAgeLimit()) {
-        commitChunk(grabCurrentChunk(guard), guard);
-    }
-}
-
-void
-Domain::commitChunk(std::unique_ptr<Chunk> chunk, const vespalib::MonitorGuard & chunkOrderGuard)
+void Domain::commit(const Packet & packet)
 {
-    assert(chunkOrderGuard.monitors(_currentChunkMonitor));
-    const Packet & packet = chunk->getPacket();
     DomainPart::SP dp(_parts.rbegin()->second);
     vespalib::nbostream_longlivedbuf is(packet.getHandle().c_str(), packet.getHandle().size());
     Packet::Entry entry;
     entry.deserialize(is);
-    if (dp->byteSize() > _config.getPartSizeLimit()) {
+    if (dp->byteSize() > _domainPartSize) {
         waitPendingSync(_syncMonitor, _pendingSync);
         triggerSyncNow();
         waitPendingSync(_syncMonitor, _pendingSync);
         dp->close();
-        dp = make_shared<DomainPart>(_name, dir(), entry.serial(), _config.getEncoding(),
-                                     _config.getCompressionlevel(), _fileHeaderContext, false);
+        dp.reset(new DomainPart(_name, dir(), entry.serial(), _defaultCrcType, _fileHeaderContext, false));
         {
             LockGuard guard(_lock);
             _parts[entry.serial()] = dp;
diff --git a/searchlib/src/vespa/searchlib/transactionlog/domain.h b/searchlib/src/vespa/searchlib/transactionlog/domain.h
index 553117959c7..c1ff9157a6f 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/domain.h
+++ b/searchlib/src/vespa/searchlib/transactionlog/domain.h
@@ -8,39 +8,16 @@
 
 namespace search::transactionlog {
 
-class DomainConfig {
-public:
-    using microseconds = std::chrono::microseconds;
-    DomainConfig();
-    DomainConfig & setEncoding(Encoding v)          { _encoding = v; return *this; }
-    DomainConfig & setPartSizeLimit(size_t v)       { _partSizeLimit = v; return *this; }
-    DomainConfig & setChunkSizeLimit(size_t v)      { _chunkSizeLimit = v; return *this; }
-    DomainConfig & setChunkAgeLimit(microseconds v) { _chunkAgeLimit = v; return *this; }
-    DomainConfig & setCompressionLevel(uint8_t v)   { _compressionLevel = v; return *this; }
-    Encoding          getEncoding() const { return _encoding; }
-    size_t       getPartSizeLimit() const { return _partSizeLimit; }
-    size_t      getChunkSizeLimit() const { return _chunkSizeLimit; }
-    microseconds getChunkAgeLimit() const { return _chunkAgeLimit; }
-    uint8_t getCompressionlevel() const { return _compressionLevel; }
-private:
-    Encoding     _encoding;
-    uint8_t      _compressionLevel;
-    size_t       _partSizeLimit;
-    size_t       _chunkSizeLimit;
-    microseconds _chunkAgeLimit;
-};
-
 struct PartInfo {
     SerialNumRange range;
     size_t numEntries;
     size_t byteSize;
     vespalib::string file;
-    PartInfo(SerialNumRange range_in, size_t numEntries_in, size_t byteSize_in, vespalib::stringref file_in)
-        : range(range_in),
-          numEntries(numEntries_in),
-          byteSize(byteSize_in),
-          file(file_in)
-    {}
+    PartInfo(SerialNumRange range_in, size_t numEntries_in,
+             size_t byteSize_in,
+             vespalib::stringref file_in)
+        : range(range_in), numEntries(numEntries_in), byteSize(byteSize_in),
+          file(file_in) {}
 };
 
 struct DomainInfo {
@@ -58,22 +35,22 @@ struct DomainInfo {
 
 typedef std::map<vespalib::string, DomainInfo> DomainStats;
 
-class Domain final : public FastOS_Runnable
+class Domain
 {
 public:
     using SP = std::shared_ptr<Domain>;
     using Executor = vespalib::ThreadExecutor;
-    Domain(const vespalib::string &name, const vespalib::string &baseDir, FastOS_ThreadPool & threadPool,
-           Executor & commitExecutor, Executor & sessionExecutor, const DomainConfig & cfg,
+    Domain(const vespalib::string &name, const vespalib::string &baseDir, Executor & commitExecutor,
+           Executor & sessionExecutor, uint64_t domainPartSize, DomainPart::Crc defaultCrcType,
            const common::FileHeaderContext &fileHeaderContext);
 
-    ~Domain() override;
+    virtual ~Domain();
 
     DomainInfo getDomainInfo() const;
     const vespalib::string & name() const { return _name; }
     bool erase(SerialNum to);
 
-    void commit(const Packet & packet, Writer::DoneCallback onDone);
+    void commit(const Packet & packet);
     int visit(const Domain::SP & self, SerialNum from, SerialNum to, FRT_Supervisor & supervisor, FNET_Connection *conn);
 
     SerialNum begin() const;
@@ -100,26 +77,8 @@ public:
         return _sessionExecutor.execute(std::move(task));
     }
     uint64_t size() const;
-    Domain & setConfig(const DomainConfig & cfg);
+
 private:
-    void Run(FastOS_ThreadInterface *thisThread, void *arguments) override;
-    void commitIfStale(const vespalib::MonitorGuard & guard);
-    class Chunk {
-    public:
-        Chunk();
-        ~Chunk();
-        void add(const Packet & packet, Writer::DoneCallback onDone);
-        size_t sizeBytes() const { return _data.sizeBytes(); }
-        const Packet & getPacket() const { return _data; }
-        std::chrono::microseconds age() const;
-    private:
-        Packet _data;
-        std::vector<Writer::DoneCallback>     _callBacks;
-        std::chrono::steady_clock::time_point _firstArrivalTime;
-    };
-
-    std::unique_ptr<Chunk> grabCurrentChunk(const vespalib::MonitorGuard & guard);
-    void commitChunk(std::unique_ptr<Chunk> chunk, const vespalib::MonitorGuard & chunkOrderGuard);
     SerialNum begin(const vespalib::LockGuard & guard) const;
     SerialNum end(const vespalib::LockGuard & guard) const;
     size_t byteSize(const vespalib::LockGuard & guard) const;
@@ -136,26 +95,22 @@ private:
     using DomainPartList = std::map<int64_t, DomainPart::SP>;
     using DurationSeconds = std::chrono::duration<double>;
 
-    DomainConfig           _config;
-    std::unique_ptr<Chunk> _currentChunk;
-    SerialNum              _lastSerial;
-    FastOS_ThreadPool    & _threadPool;
-    Executor             & _commitExecutor;
-    Executor             & _sessionExecutor;
-    std::atomic<int>       _sessionId;
-    vespalib::Monitor      _syncMonitor;
-    bool                   _pendingSync;
-    vespalib::string       _name;
-    DomainPartList         _parts;
-    vespalib::Lock         _lock;
-    vespalib::Monitor      _currentChunkMonitor;
-    vespalib::Lock         _sessionLock;
-    SessionList            _sessions;
-    DurationSeconds        _maxSessionRunTime;
-    vespalib::string       _baseDir;
+    DomainPart::Crc     _defaultCrcType;
+    Executor          & _commitExecutor;
+    Executor          & _sessionExecutor;
+    std::atomic<int>    _sessionId;
+    vespalib::Monitor   _syncMonitor;
+    bool                _pendingSync;
+    vespalib::string    _name;
+    uint64_t            _domainPartSize;
+    DomainPartList      _parts;
+    vespalib::Lock      _lock;
+    vespalib::Lock      _sessionLock;
+    SessionList         _sessions;
+    DurationSeconds     _maxSessionRunTime;
+    vespalib::string    _baseDir;
     const common::FileHeaderContext &_fileHeaderContext;
-    bool                   _markedDeleted;
-    FastOS_ThreadInterface  * _self;
+    bool                _markedDeleted;
 };
 
 }
diff --git a/searchlib/src/vespa/searchlib/transactionlog/domainpart.cpp b/searchlib/src/vespa/searchlib/transactionlog/domainpart.cpp
index f140fb93b96..35bdc71c963 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/domainpart.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/domainpart.cpp
@@ -2,6 +2,7 @@
 
 #include "domainpart.h"
 #include <vespa/vespalib/util/crc.h>
+#include <vespa/vespalib/xxhash/xxhash.h>
 #include <vespa/vespalib/util/stringfmt.h>
 #include <vespa/vespalib/data/fileheader.h>
 #include <vespa/searchlib/common/fileheadercontext.h>
@@ -26,26 +27,37 @@ namespace search::transactionlog {
 
 namespace {
 
-constexpr size_t TARGET_PACKET_SIZE = 0x3f000;
+void
+handleSync(FastOS_FileInterface &file) __attribute__ ((noinline));
 
 string
-handleWriteError(const char *text, FastOS_FileInterface &file, int64_t lastKnownGoodPos,
-                 SerialNumRange range, int bufLen) __attribute__ ((noinline));
+handleWriteError(const char *text,
+                 FastOS_FileInterface &file,
+                 int64_t lastKnownGoodPos,
+                 const Packet::Entry &entry,
+                 int bufLen) __attribute__ ((noinline));
 
 bool
-handleReadError(const char *text, FastOS_FileInterface &file, ssize_t len, ssize_t rlen,
-                int64_t lastKnownGoodPos, bool allowTruncate) __attribute__ ((noinline));
+handleReadError(const char *text,
+                FastOS_FileInterface &file,
+                ssize_t len,
+                ssize_t rlen,
+                int64_t lastKnownGoodPos,
+                bool allowTruncate) __attribute__ ((noinline));
 
-void handleSync(FastOS_FileInterface &file) __attribute__ ((noinline));
-void addPacket(Packet &packet, const Packet::Entry &e) __attribute__ ((noinline));
-bool tailOfFileIsZero(FastOS_FileInterface &file, int64_t lastKnownGoodPos) __attribute__ ((noinline));
+bool
+addPacket(Packet &packet,
+          const Packet::Entry &e) __attribute__ ((noinline));
 
-void
+bool
+tailOfFileIsZero(FastOS_FileInterface &file, int64_t lastKnownGoodPos) __attribute__ ((noinline));
+
+bool
 addPacket(Packet &packet, const Packet::Entry &e)
 {
     LOG(spam, "Adding serial #%" PRIu64 ", of type %d and size %zd into packet of size %zu and %zu bytes",
               e.serial(), e.type(), e.data().size(), packet.size(), packet.sizeBytes());
-    packet.add(e);
+    return ! packet.add(e);
 }
 
 void
@@ -60,18 +72,21 @@ handleSync(FastOS_FileInterface &file)
 }
 
 string
-handleWriteError(const char *text, FastOS_FileInterface &file, int64_t lastKnownGoodPos,
-                 SerialNumRange range, int bufLen)
+handleWriteError(const char *text,
+                 FastOS_FileInterface &file,
+                 int64_t lastKnownGoodPos,
+                 const Packet::Entry &entry,
+                 int bufLen)
 {
     string last(FastOS_File::getLastErrorString());
-    string e(make_string("%s. File '%s' at position %" PRId64 " for entries [%zu, %zu] of length %u. "
-                         "OS says '%s'. Rewind to last known good position %zu.",
-                         text, file.GetFileName(), file.GetPosition(), range.from(), range.to(), bufLen,
+    string e(make_string("%s. File '%s' at position %" PRId64 " for entry %" PRIu64 " of length %u. "
+                         "OS says '%s'. Rewind to last known good position %" PRId64 ".",
+                         text, file.GetFileName(), file.GetPosition(), entry.serial(), bufLen,
                          last.c_str(), lastKnownGoodPos));
     LOG(error, "%s",  e.c_str());
     if ( ! file.SetPosition(lastKnownGoodPos) ) {
         last = FastOS_File::getLastErrorString();
-        throw runtime_error(make_string("Failed setting position %zu of file '%s' of size %zd : OS says '%s'",
+        throw runtime_error(make_string("Failed setting position %" PRId64 " of file '%s' of size %" PRId64 ": OS says '%s'",
                                         lastKnownGoodPos, file.GetFileName(), file.GetSize(), last.c_str()));
     }
     handleSync(file);
@@ -103,8 +118,12 @@ tailOfFileIsZero(FastOS_FileInterface &file, int64_t lastKnownGoodPos)
 }
 
 bool
-handleReadError(const char *text, FastOS_FileInterface &file, ssize_t len, ssize_t rlen,
-                int64_t lastKnownGoodPos, bool allowTruncate)
+handleReadError(const char *text,
+                FastOS_FileInterface &file,
+                ssize_t len,
+                ssize_t rlen,
+                int64_t lastKnownGoodPos,
+                bool allowTruncate)
 {
     bool retval(true);
     if (rlen != -1) {
@@ -159,43 +178,6 @@ handleReadError(const char *text, FastOS_FileInterface &file, ssize_t len, ssize
 
 }
 
-Packet
-DomainPart::readPacket(FastOS_FileInterface & transLog, SerialNumRange wanted, size_t targetSize, bool allowTruncate) {
-    Alloc buf;
-    Packet packet(targetSize);
-    int64_t fSize(transLog.GetSize());
-    int64_t currPos(transLog.GetPosition());
-    for(size_t i(0); (packet.sizeBytes() < targetSize) && (currPos < fSize) && (packet.range().to() < wanted.to()); i++) {
-        IChunk::UP chunk;
-        if (read(transLog, chunk, buf, allowTruncate)) {
-            if (chunk) {
-                try {
-                    for (const Packet::Entry & e : chunk->getEntries()) {
-                        if ((wanted.from() < e.serial()) && (e.serial() <= wanted.to())) {
-                            addPacket(packet, e);
-                        }
-                    }
-                } catch (const std::exception & ex) {
-                    throw runtime_error(make_string("%s : Failed creating packet for list %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
-                                                    ex.what(), transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
-                }
-            } else {
-                throw runtime_error(make_string("Invalid entry reading file %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
-                                                transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
-            }
-        } else {
-            if (transLog.GetSize() != fSize) {
-                fSize = transLog.GetSize();
-            } else {
-                throw runtime_error(make_string("Failed reading file %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
-                                                transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
-            }
-        }
-        currPos = transLog.GetPosition();
-    }
-    return packet;
-}
-
 int64_t
 DomainPart::buildPacketMapping(bool allowTruncate)
 {
@@ -226,35 +208,66 @@ DomainPart::buildPacketMapping(bool allowTruncate)
             handleReadError("file header", transLog, 0, FileHeader::getMinSize(), 0, allowTruncate);
         }
     }
-    const SerialNumRange all(0, std::numeric_limits<SerialNum>::max());
     while ((currPos < fSize)) {
-        const int64_t firstPos(currPos);
-        Packet packet = readPacket(transLog, all, TARGET_PACKET_SIZE, allowTruncate);
-        if (!packet.empty()) {
-            _sz += packet.size();
-            const SerialNum firstSerial = packet.range().from();
-            if (currPos == _headerLen) {
-                _range.from(firstSerial);
+        Packet packet;
+        SerialNum firstSerial(0);
+        SerialNum lastSerial(0);
+        int64_t firstPos(currPos);
+        bool full(false);
+        Alloc buf;
+        for(size_t i(0); !full && (currPos < fSize); i++) {
+            Packet::Entry e;
+            if (read(transLog, e, buf, allowTruncate)) {
+                if (e.valid()) {
+                    if (i == 0) {
+                        firstSerial = e.serial();
+                        if (currPos == _headerLen) {
+                            _range.from(firstSerial);
+                        }
+                    }
+                    try {
+                        full = addPacket(packet, e);
+                        if ( ! full ) {
+                            lastSerial = e.serial();
+                            currPos = transLog.GetPosition();
+                            _sz++;
+                        } else {
+                            transLog.SetPosition(currPos);
+                        }
+                    } catch (const std::exception & ex) {
+                        throw runtime_error(make_string("%s : Failed creating packet for list %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
+                                                    ex.what(), transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
+                    }
+                } else {
+                    throw runtime_error(make_string("Invalid entry reading file %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
+                                                transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
+                }
+            } else {
+                if (transLog.GetSize() != fSize) {
+                    fSize = transLog.GetSize();
+                } else {
+                    throw runtime_error(make_string("Failed reading file %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
+                                                transLog.GetFileName(), fSize, currPos, transLog.GetPosition()));
+                }
             }
-            _range.to(packet.range().to());
-            _packets.insert(std::make_pair(firstSerial, std::move(packet)));
+        }
+        packet.close();
+        if (!packet.empty()) {
+            _packets[firstSerial] = packet;
+            _range.to(lastSerial);
             {
                 LockGuard guard(_lock);
                 _skipList.push_back(SkipInfo(firstSerial, firstPos));
             }
-        } else {
-            fSize = transLog.GetSize();
         }
-        currPos = transLog.GetPosition();
     }
     transLog.Close();
     return currPos;
 }
 
-DomainPart::DomainPart(const string & name, const string & baseDir, SerialNum s, Encoding encoding,
-                       uint8_t compressionLevel, const FileHeaderContext &fileHeaderContext, bool allowTruncate) :
-    _encoding(encoding),
-    _compressionLevel(compressionLevel),
+DomainPart::DomainPart(const string & name, const string & baseDir, SerialNum s, Crc defaultCrc,
+                       const FileHeaderContext &fileHeaderContext, bool allowTruncate) :
+    _defaultCrc(defaultCrc),
     _lock(),
     _fileLock(),
     _range(s),
@@ -398,12 +411,10 @@ DomainPart::commit(SerialNum firstSerial, const Packet &packet)
         //LOG(spam,
         //"Pos(%d) Len(%d), Lim(%d), Remaining(%d)",
         //h.getPos(), h.getLength(), h.getLimit(), h.getRemaining());
-        IChunk::UP chunk = IChunk::create(_encoding, _compressionLevel);
         Packet::Entry entry;
         entry.deserialize(h);
         if (_range.to() < entry.serial()) {
-            chunk->add(entry);
-            write(*_transLog, *chunk);
+            write(*_transLog, entry);
             _sz++;
             _range.to(entry.serial());
         } else {
@@ -417,15 +428,17 @@ DomainPart::commit(SerialNum firstSerial, const Packet &packet)
     if ( ! _packets.empty() ) {
         Packet & lastPacket = _packets.rbegin()->second;
         if (lastPacket.sizeBytes() < 0xf000) {
-            lastPacket.merge(packet);
-            merged = true;
+            if ( ! (merged = lastPacket.merge(packet)) ) {
+                LOG(error, "Failed merging packet [%" PRIu64 ", %" PRIu64 "] with [%" PRIu64 ", %" PRIu64 "]",
+                           lastPacket.range().from(), lastPacket.range().to(),
+                           packet.range().from(), packet.range().to());
+            }
         }
     }
     if (! merged ) {
-        _packets.insert(std::make_pair(firstSerial, std::move(packet)));
+        _packets[firstSerial] = packet;
         _skipList.push_back(SkipInfo(firstSerial, firstPos));
     }
-    sync();
 }
 
 void DomainPart::sync()
@@ -493,17 +506,23 @@ DomainPart::visit(SerialNumRange &r, Packet &packet)
                         if (e.serial() <= r.to()) {
                             LOG(spam, "Adding serial #%" PRIu64 ", of type %d and size %zd into packet of size %zu and %zu bytes",
                                       e.serial(), e.type(), e.data().size(), newPacket.size(), newPacket.sizeBytes());
-                            newPacket.add(e);
-                            r.from(e.serial());
+                            if (newPacket.add(e)) {
+                                r.from(e.serial());
+                            } else {
+                                throw runtime_error("Could not add entry to packet. Here is some mumbo jumbo. Fix.");
+                            }
                         } else {
                             // Force breakout on visiting empty interval.
                             r.from(r.to());
                         }
                     }
                 }
-                packet = std::move(newPacket);
+                newPacket.close();
+                packet = newPacket;
                 retval = next != _packets.end();
             }
+        } else {
+            packet.close();
         }
     } else {
         /// File has been closed must continue from file.
@@ -520,86 +539,131 @@ DomainPart::visit(FastOS_FileInterface &file, SerialNumRange &r, Packet &packet)
     if ( ! file.IsOpened() ) {
         retval = openAndFind(file, r.from() + 1);
     }
-    if ( ! retval) {
-        return false;
-    }
-
-    packet = readPacket(file, r, TARGET_PACKET_SIZE, false);
-    if (!packet.empty()) {
-        r.from(packet.range().to());
+    if (retval) {
+        Packet newPacket;
+        Alloc buf;
+        for (bool full(false);!full && retval && (r.from() < r.to());) {
+            Packet::Entry e;
+            int64_t fPos = file.GetPosition();
+            retval = read(file, e, buf, false);
+            if (retval &&
+                e.valid() &&
+                (r.from() < e.serial()) &&
+                (e.serial() <= r.to())) {
+                try {
+                    full = addPacket(newPacket, e);
+                } catch (const std::exception & ex) {
+                    throw runtime_error(make_string("%s : Failed creating packet for visit %s(%" PRIu64 ") at pos(%" PRIu64 ", %" PRIu64 ")",
+                                                    ex.what(), file.GetFileName(), file.GetSize(), fPos, file.GetPosition()));
+                }
+                if ( !full ) {
+                    r.from(e.serial());
+                } else {
+                    if ( ! file.SetPosition(fPos) ) {
+                        throw runtime_error(make_string("Failed setting read position for file '%s' of size %" PRId64 " from %" PRId64 " to %" PRId64 ".",
+                                                        file.GetFileName(), file.GetSize(), file.GetPosition(), fPos));
+                    }
+                }
+            }
+        }
+        newPacket.close();
+        packet = newPacket;
     }
 
-    return !packet.empty();
+    return retval;
 }
 
 void
-DomainPart::write(FastOS_FileInterface &file, const IChunk & chunk)
+DomainPart::write(FastOS_FileInterface &file, const Packet::Entry &entry)
 {
-    nbostream os;
-    size_t begin = os.wp();
-    os << _encoding.getRaw();
-    os << uint32_t(0);
-    Encoding realEncoding = chunk.encode(os);
-    size_t end = os.wp();
-    os.wp(0);
-    os << realEncoding.getRaw();
-    os << uint32_t(end - (begin + sizeof(uint32_t) + sizeof(uint8_t)));
-    os.wp(end);
     int64_t lastKnownGoodPos(file.GetPosition());
+    int32_t crc(0);
+    uint32_t len(entry.serializedSize() + sizeof(crc));
+    nbostream os;
+    os << static_cast<uint8_t>(_defaultCrc);
+    os << len;
+    size_t start(os.size());
+    entry.serialize(os);
+    size_t end(os.size());
+    crc = calcCrc(_defaultCrc, os.c_str()+start, end - start);
+    os << crc;
+    size_t osSize = os.size();
+    assert(osSize == len + sizeof(len) + sizeof(uint8_t));
 
     LockGuard guard(_writeLock);
-    if ( ! file.CheckedWrite(os.c_str(), os.size()) ) {
-        throw runtime_error(handleWriteError("Failed writing the entry.", file, lastKnownGoodPos, chunk.range(), os.size()));
+    if ( ! file.CheckedWrite(os.c_str(), osSize) ) {
+        throw runtime_error(handleWriteError("Failed writing the entry.", file, lastKnownGoodPos, entry, end - start));
     }
-    _writtenSerial = chunk.range().to();
-    _byteSize.store(lastKnownGoodPos + os.size(), std::memory_order_release);
+    _writtenSerial = entry.serial();
+    _byteSize.store(lastKnownGoodPos + osSize, std::memory_order_release);
 }
 
 bool
-DomainPart::read(FastOS_FileInterface &file, IChunk::UP & chunk, Alloc & buf, bool allowTruncate)
+DomainPart::read(FastOS_FileInterface &file,
+                 Packet::Entry &entry,
+                 Alloc & buf,
+                 bool allowTruncate)
 {
+    bool retval(true);
     char tmp[5];
     int64_t lastKnownGoodPos(file.GetPosition());
     size_t rlen = file.Read(tmp, sizeof(tmp));
     nbostream his(tmp, sizeof(tmp));
-    uint8_t encoding(-1);
+    uint8_t version(-1);
     uint32_t len(0);
-    his >> encoding >> len;
-    if (rlen != sizeof(tmp)) {
-        return (rlen == 0)
-               ? true
-               : handleReadError("packet length", file, sizeof(len), rlen, lastKnownGoodPos, allowTruncate);
-    }
-
-    try {
-        chunk = IChunk::create(encoding);
-    } catch (const std::exception & e) {
-        string msg(make_string("Version mismatch. Expected 'ccitt_crc32=1' or 'xxh64=2',"
-                               " got %d from '%s' at position %ld",
-                               encoding, file.GetFileName(), lastKnownGoodPos));
-        if ((encoding == 0) && (len == 0) && tailOfFileIsZero(file, lastKnownGoodPos)) {
-            LOG(warning, "%s", msg.c_str());
-            return handleReadError("packet version", file, sizeof(tmp), rlen, lastKnownGoodPos, allowTruncate);
+    his >> version >> len;
+    if ((retval = (rlen == sizeof(tmp)))) {
+        if ( ! (retval = (version == ccitt_crc32) || version == xxh64)) {
+            string msg(make_string("Version mismatch. Expected 'ccitt_crc32=1' or 'xxh64=2',"
+                                             " got %d from '%s' at position %ld",
+                                             version, file.GetFileName(), lastKnownGoodPos));
+            if ((version == 0) && (len == 0) && tailOfFileIsZero(file, lastKnownGoodPos)) {
+                LOG(warning, "%s", msg.c_str());
+                return handleReadError("packet version", file, sizeof(tmp), rlen, lastKnownGoodPos, allowTruncate);
+            } else {
+                throw runtime_error(msg);
+            }
+        }
+        if (len > buf.size()) {
+            Alloc::alloc(len).swap(buf);
+        }
+        rlen = file.Read(buf.get(), len);
+        retval = rlen == len;
+        if (!retval) {
+            retval = handleReadError("packet blob", file, len, rlen, lastKnownGoodPos, allowTruncate);
         } else {
-            throw runtime_error(msg);
+            nbostream_longlivedbuf is(buf.get(), len);
+            entry.deserialize(is);
+            int32_t crc(0);
+            is >> crc;
+            int32_t crcVerify(calcCrc(static_cast<Crc>(version), buf.get(), len - sizeof(crc)));
+            if (crc != crcVerify) {
+                throw runtime_error(make_string("Got bad crc for packet from '%s' (len pos=%" PRId64 ", len=%d) : crcVerify = %d, expected %d",
+                                                file.GetFileName(), file.GetPosition() - len - sizeof(len),
+                                                static_cast<int>(len), static_cast<int>(crcVerify), static_cast<int>(crc)));
+            }
+        }
+    } else {
+        if (rlen == 0) {
+           // Eof
+        } else {
+           retval = handleReadError("packet length", file, sizeof(len), rlen, lastKnownGoodPos, allowTruncate);
         }
     }
-    if (len > buf.size()) {
-        Alloc::alloc(len).swap(buf);
-    }
-    rlen = file.Read(buf.get(), len);
-    if (rlen != len) {
-        return handleReadError("packet blob", file, len, rlen, lastKnownGoodPos, allowTruncate);
-    }
-    try {
-        nbostream_longlivedbuf is(buf.get(), len);
-        chunk->decode(is);
-    } catch (const std::exception & e) {
-        throw runtime_error(make_string("Got exception during decoding of packet '%s' from file '%s' (len pos=%" PRId64 ", len=%d)",
-                            e.what(), file.GetFileName(), file.GetPosition() - len - sizeof(len), static_cast<int>(len)));
-    }
+    return retval;
+}
 
-    return true;
+int32_t DomainPart::calcCrc(Crc version, const void * buf, size_t sz)
+{
+    if (version == xxh64) {
+        return static_cast<int32_t>(XXH64(buf, sz, 0ll));
+    } else if (version == ccitt_crc32) {
+        vespalib::crc_32_type calculator;
+        calculator.process_bytes(buf, sz);
+        return calculator.checksum();
+    } else {
+        abort();
+    }
 }
 
 }
diff --git a/searchlib/src/vespa/searchlib/transactionlog/domainpart.h b/searchlib/src/vespa/searchlib/transactionlog/domainpart.h
index 5256b731125..59d0df6df94 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/domainpart.h
+++ b/searchlib/src/vespa/searchlib/transactionlog/domainpart.h
@@ -2,7 +2,6 @@
 #pragma once
 
 #include "common.h"
-#include "ichunk.h"
 #include <vespa/vespalib/util/sync.h>
 #include <vespa/vespalib/util/memory.h>
 #include <map>
@@ -20,9 +19,13 @@ private:
     DomainPart& operator=(const DomainPart &);
 
 public:
+    enum Crc {
+        ccitt_crc32=1,
+        xxh64=2
+    };
     typedef std::shared_ptr<DomainPart> SP;
-    DomainPart(const vespalib::string &name, const vespalib::string &baseDir, SerialNum s, Encoding defaultEncoding,
-               uint8_t compressionLevel, const common::FileHeaderContext &FileHeaderContext, bool allowTruncate);
+    DomainPart(const vespalib::string &name, const vespalib::string &baseDir, SerialNum s, Crc defaultCrc,
+               const common::FileHeaderContext &FileHeaderContext, bool allowTruncate);
 
     ~DomainPart();
 
@@ -46,13 +49,13 @@ public:
     }
     bool        isClosed() const;
 private:
-    using Alloc = vespalib::alloc::Alloc;
     bool openAndFind(FastOS_FileInterface &file, const SerialNum &from);
     int64_t buildPacketMapping(bool allowTruncate);
-    static Packet readPacket(FastOS_FileInterface & file, SerialNumRange wanted, size_t targetSize, bool allowTruncate);
-    static bool read(FastOS_FileInterface &file, IChunk::UP & chunk, Alloc &buf, bool allowTruncate);
 
-    void write(FastOS_FileInterface &file, const IChunk & entry);
+    static bool read(FastOS_FileInterface &file, Packet::Entry &entry, vespalib::alloc::Alloc &buf, bool allowTruncate);
+
+    void write(FastOS_FileInterface &file, const Packet::Entry &entry);
+    static int32_t calcCrc(Crc crc, const void * buf, size_t len);
     void writeHeader(const common::FileHeaderContext &fileHeaderContext);
 
     class SkipInfo
@@ -74,22 +77,21 @@ private:
     };
     typedef std::vector<SkipInfo> SkipList;
     typedef std::map<SerialNum, Packet> PacketList;
-    const Encoding        _encoding;
-    const uint8_t         _compressionLevel;
-    vespalib::Lock        _lock;
-    vespalib::Lock        _fileLock;
-    SerialNumRange        _range;
-    size_t                _sz;
+    const Crc      _defaultCrc;
+    vespalib::Lock _lock;
+    vespalib::Lock _fileLock;
+    SerialNumRange _range;
+    size_t         _sz;
     std::atomic<uint64_t> _byteSize;
-    PacketList            _packets;
-    vespalib::string      _fileName;
+    PacketList     _packets;
+    vespalib::string _fileName;
     std::unique_ptr<FastOS_FileInterface> _transLog;
-    SkipList              _skipList;
-    uint32_t              _headerLen;
-    vespalib::Lock        _writeLock;
+    SkipList       _skipList;
+    uint32_t       _headerLen;
+    vespalib::Lock _writeLock;
     // Protected by _writeLock
-    SerialNum             _writtenSerial;
-    SerialNum             _syncedSerial;
+    SerialNum      _writtenSerial;
+    SerialNum      _syncedSerial;
 };
 
 }
diff --git a/searchlib/src/vespa/searchlib/transactionlog/ichunk.cpp b/searchlib/src/vespa/searchlib/transactionlog/ichunk.cpp
deleted file mode 100644
index af7d396c0e4..00000000000
--- a/searchlib/src/vespa/searchlib/transactionlog/ichunk.cpp
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-
-#include "chunks.h"
-#include <vespa/vespalib/util/stringfmt.h>
-#include <vespa/vespalib/util/crc.h>
-#include <vespa/vespalib/xxhash/xxhash.h>
-#include <cassert>
-
-using std::runtime_error;
-using std::make_unique;
-using vespalib::make_string;
-using vespalib::nbostream_longlivedbuf;
-using vespalib::compression::CompressionConfig;
-
-namespace search::transactionlog {
-
-Encoding::Encoding(Crc crc, Compression compression)
-    : _raw(crc | (compression >> 2))
-{
-    assert(crc <= Crc::xxh64);
-    assert(compression <= Compression::lz4);
-}
-
-IChunk::~IChunk() = default;
-
-void
-IChunk::add(const Packet::Entry & entry) {
-    _entries.emplace_back(entry);
-}
-
-SerialNumRange
-IChunk::range() const {
-    return _entries.empty()
-           ? SerialNumRange()
-           : SerialNumRange(_entries.front().serial(), _entries.back().serial());
-}
-
-void
-IChunk::deserializeEntries(nbostream & is) {
-    while (is.good() && !is.empty()) {
-        Packet::Entry e;
-        e.deserialize(is);
-        add(e);
-    }
-}
-
-void
-IChunk::serializeEntries(nbostream & os) const {
-    for (const auto & e : _entries) {
-        e.serialize(os);
-    }
-}
-
-Encoding
-IChunk::encode(nbostream & os) const {
-    return onEncode(os);
-}
-
-void
-IChunk::decode(nbostream & is) {
-    onDecode(is);
-}
-
-IChunk::UP
-IChunk::create(uint8_t chunkType) {
-    return create(Encoding(chunkType), 9);
-}
-IChunk::UP
-IChunk::create(Encoding encoding, uint8_t compressionLevel) {
-    switch (encoding.getCrc()) {
-        case Encoding::Crc::xxh64:
-            switch (encoding.getCompression()) {
-                case Encoding::Compression::none:
-                    return make_unique<XXH64None>();
-                case Encoding::Compression::lz4:
-                    return make_unique<XXH64Compressed>(CompressionConfig::LZ4, compressionLevel);
-                case Encoding::Compression::zstd:
-                    return make_unique<XXH64Compressed>(CompressionConfig::ZSTD, compressionLevel);
-                default:
-                    return make_unique<XXH64Compressed>(CompressionConfig::LZ4, compressionLevel);
-            }
-        case Encoding::Crc::ccitt_crc32:
-            switch (encoding.getCompression()) {
-                case Encoding::Compression::none:
-                    return make_unique<CCITTCRC32None>();
-                default:
-                    throw runtime_error(make_string("Unhandled compression type '%d' for ccitt_crc32 compression",
-                                                    encoding.getCompression()));
-            }
-        default:
-            throw runtime_error(make_string("Unhandled crc type '%d'", encoding.getCrc()));
-    }
-}
-
-int32_t Encoding::calcCrc(Crc version, const void * buf, size_t sz)
-{
-    if (version == xxh64) {
-        return static_cast<int32_t>(XXH64(buf, sz, 0ll));
-    } else if (version == ccitt_crc32) {
-        vespalib::crc_32_type calculator;
-        calculator.process_bytes(buf, sz);
-        return calculator.checksum();
-    } else {
-        abort();
-    }
-}
-
-}
diff --git a/searchlib/src/vespa/searchlib/transactionlog/ichunk.h b/searchlib/src/vespa/searchlib/transactionlog/ichunk.h
deleted file mode 100644
index 0e913703468..00000000000
--- a/searchlib/src/vespa/searchlib/transactionlog/ichunk.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-
-#pragma once
-
-#include "common.h"
-#include <memory>
-
-namespace vespalib { class nbostream; }
-
-namespace search::transactionlog {
-
-class Encoding {
-public:
-    enum Crc {
-        nocrc = 0,
-        ccitt_crc32 = 1,
-        xxh64 = 2
-    };
-    enum Compression {
-        none = 0,
-        lz4 = 1,
-        zstd = 2
-    };
-    Encoding(uint8_t raw) : _raw(raw) {}
-    Encoding(Crc crc, Compression compression);
-    Crc getCrc() const { return Crc(_raw & 0x3); }
-    Compression getCompression() const { return Compression((_raw >> 2) & 0xf); }
-    static int32_t calcCrc(Crc version, const void * buf, size_t sz);
-    uint8_t getRaw() const { return _raw; }
-private:
-    uint8_t _raw;
-};
-
-class IChunk {
-public:
-    using UP = std::unique_ptr<IChunk>;
-    using Entries = std::vector<Packet::Entry>;
-    using nbostream = vespalib::nbostream;
-    using ConstBufferRef = vespalib::ConstBufferRef;
-    virtual ~IChunk();
-    const Entries & getEntries() const { return _entries; }
-    void add(const Packet::Entry & entry);
-    Encoding encode(nbostream & os) const;
-    void decode(nbostream & buf);
-    static UP create(uint8_t chunkType);
-    static UP create(Encoding chunkType, uint8_t compressionLevel);
-    SerialNumRange range() const;
-protected:
-    virtual Encoding onEncode(nbostream & os) const = 0;
-    virtual void onDecode(nbostream & is) = 0;
-    void deserializeEntries(nbostream & is);
-    void serializeEntries(nbostream & os) const;
-private:
-    Entries _entries;
-};
-
-}
diff --git a/searchlib/src/vespa/searchlib/transactionlog/session.cpp b/searchlib/src/vespa/searchlib/transactionlog/session.cpp
index 56aaa162485..cbcbc68fdff 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/session.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/session.cpp
@@ -36,7 +36,7 @@ Session::VisitTask::run()
 
 bool
 Session::visit(FastOS_FileInterface & file, DomainPart & dp) {
-    Packet packet(size_t(-1));
+    Packet packet;
     bool more(false);
     if (dp.isClosed()) {
         more = dp.visit(file, _range, packet);
diff --git a/searchlib/src/vespa/searchlib/transactionlog/translogserver.cpp b/searchlib/src/vespa/searchlib/transactionlog/translogserver.cpp
index f724f5035c8..4c3c5609a93 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/translogserver.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/translogserver.cpp
@@ -1,6 +1,5 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 #include "translogserver.h"
-#include <vespa/searchlib/common/gatecallback.h>
 #include <vespa/vespalib/util/stringfmt.h>
 #include <vespa/vespalib/io/fileutil.h>
 #include <vespa/vespalib/util/exceptions.h>
@@ -14,9 +13,6 @@ using vespalib::make_string;
 using vespalib::stringref;
 using vespalib::IllegalArgumentException;
 using search::common::FileHeaderContext;
-using std::make_shared;
-using std::runtime_error;
-using namespace std::chrono_literals;
 
 namespace search::transactionlog {
 
@@ -30,16 +26,21 @@ class SyncHandler : public FNET_Task
     SerialNum                   _syncTo;
     
 public:
-    SyncHandler(FRT_Supervisor *supervisor, FRT_RPCRequest *req,const Domain::SP &domain,
-                const TransLogServer::Session::SP &session, SerialNum syncTo);
+    SyncHandler(FRT_Supervisor *supervisor,
+                FRT_RPCRequest *req,const Domain::SP &domain,
+                const TransLogServer::Session::SP &session,
+                SerialNum syncTo);
 
     ~SyncHandler();
     void PerformTask() override;
 };
 
 
-SyncHandler::SyncHandler(FRT_Supervisor *supervisor, FRT_RPCRequest *req, const Domain::SP &domain,
-                         const TransLogServer::Session::SP &session, SerialNum syncTo)
+SyncHandler::SyncHandler(FRT_Supervisor *supervisor,
+                         FRT_RPCRequest *req,
+                         const Domain::SP &domain,
+                         const TransLogServer::Session::SP &session,
+                         SerialNum syncTo)
     : FNET_Task(supervisor->GetScheduler()),
       _req(*req),
       _domain(domain),
@@ -49,7 +50,9 @@ SyncHandler::SyncHandler(FRT_Supervisor *supervisor, FRT_RPCRequest *req, const
 }
 
 
-SyncHandler::~SyncHandler() = default;
+SyncHandler::~SyncHandler()
+{
+}
 
 
 void
@@ -74,25 +77,25 @@ SyncHandler::PerformTask()
 
 TransLogServer::TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
                                const FileHeaderContext &fileHeaderContext)
-    : TransLogServer(name, listenPort, baseDir, fileHeaderContext,
-                     DomainConfig().setEncoding(Encoding(Encoding::xxh64, Encoding::Compression::none))
-                             .setPartSizeLimit(0x10000000).setChunkSizeLimit(0x40000).setChunkAgeLimit( 1ms))
+    : TransLogServer(name, listenPort, baseDir, fileHeaderContext, 0x10000000)
 {}
 
 TransLogServer::TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
-                               const FileHeaderContext &fileHeaderContext, const DomainConfig & cfg)
-    : TransLogServer(name, listenPort, baseDir, fileHeaderContext, cfg, 4)
+                               const FileHeaderContext &fileHeaderContext, uint64_t domainPartSize)
+    : TransLogServer(name, listenPort, baseDir, fileHeaderContext, domainPartSize, 4, DomainPart::Crc::xxh64)
 {}
 
 TransLogServer::TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
-                               const FileHeaderContext &fileHeaderContext, const DomainConfig & cfg, size_t maxThreads)
+                               const FileHeaderContext &fileHeaderContext, uint64_t domainPartSize,
+                               size_t maxThreads, DomainPart::Crc defaultCrcType)
     : FRT_Invokable(),
       _name(name),
       _baseDir(baseDir),
-      _domainConfig(cfg),
+      _domainPartSize(domainPartSize),
+      _defaultCrcType(defaultCrcType),
       _commitExecutor(maxThreads, 128*1024),
       _sessionExecutor(maxThreads, 128*1024),
-      _threadPool(0x20000),
+      _threadPool(8192, 1),
       _supervisor(std::make_unique<FRT_Supervisor>()),
       _domains(),
       _reqQ(),
@@ -107,8 +110,8 @@ TransLogServer::TransLogServer(const vespalib::string &name, int listenPort, con
                 domainDir >> domainName;
                 if ( ! domainName.empty()) {
                     try {
-                        auto domain = make_shared<Domain>(domainName, dir(), _threadPool, _commitExecutor,
-                                                          _sessionExecutor, cfg,_fileHeaderContext);
+                        auto domain = std::make_shared<Domain>(domainName, dir(), _commitExecutor, _sessionExecutor,
+                                                               _domainPartSize, _defaultCrcType,_fileHeaderContext);
                         _domains[domain->name()] = domain;
                     } catch (const std::exception & e) {
                         LOG(warning, "Failed creating %s domain on startup. Exception = %s", domainName.c_str(), e.what());
@@ -129,13 +132,13 @@ TransLogServer::TransLogServer(const vespalib::string &name, int listenPort, con
                 }
             }
             if ( ! listenOk ) {
-                throw runtime_error(make_string("Failed listening at port %s. Giving up. Requires manual intervention.", listenSpec));
+                throw std::runtime_error(make_string("Failed listening at port %s. Giving up. Requires manual intervention.", listenSpec));
             }
         } else {
-            throw runtime_error(make_string("Failed creating tls dir %s r(%d), e(%d). Requires manual intervention.", dir().c_str(), retval, errno));
+            throw std::runtime_error(make_string("Failed creating tls dir %s r(%d), e(%d). Requires manual intervention.", dir().c_str(), retval, errno));
         }
     } else {
-        throw runtime_error(make_string("Failed creating tls base dir %s r(%d), e(%d). Requires manual intervention.", _baseDir.c_str(), retval, errno));
+        throw std::runtime_error(make_string("Failed creating tls base dir %s r(%d), e(%d). Requires manual intervention.", _baseDir.c_str(), retval, errno));
     }
     start(_threadPool);
 }
@@ -197,7 +200,7 @@ void TransLogServer::run()
             }
         }
         logMetric();
-    } while (running() && !(hasPacket && (req == nullptr)));
+    } while (running() && !(hasPacket && (req == NULL)));
     LOG(info, "TLS Stopped");
 }
 
@@ -212,17 +215,6 @@ void TransLogServer::logMetric() const
     }
 }
 
-
-TransLogServer &
-TransLogServer::setDomainConfig(const DomainConfig & cfg) {
-    Guard domainGuard(_lock);
-    _domainConfig = cfg;
-    for(auto &domain: _domains) {
-        domain.second->setConfig(cfg);
-    }
-    return *this;
-}
-
 DomainStats
 TransLogServer::getDomainStats() const
 {
@@ -357,8 +349,8 @@ void TransLogServer::createDomain(FRT_RPCRequest *req)
     Domain::SP domain(findDomain(domainName));
     if ( !domain ) {
         try {
-            domain = make_shared<Domain>(domainName, dir(), _threadPool, _commitExecutor,
-                                         _sessionExecutor, _domainConfig, _fileHeaderContext);
+            domain = std::make_shared<Domain>(domainName, dir(), _commitExecutor, _sessionExecutor,
+                                              _domainPartSize, _defaultCrcType, _fileHeaderContext);
             {
                 Guard domainGuard(_lock);
                 _domains[domain->name()] = domain;
@@ -470,7 +462,7 @@ void TransLogServer::commit(const vespalib::string & domainName, const Packet &
     (void) done;
     Domain::SP domain(findDomain(domainName));
     if (domain) {
-        domain->commit(packet, std::move(done));
+        domain->commit(packet);
     } else {
         throw IllegalArgumentException("Could not find domain " + domainName);
     }
@@ -486,9 +478,7 @@ void TransLogServer::domainCommit(FRT_RPCRequest *req)
     if (domain) {
         Packet packet(params[1]._data._buf, params[1]._data._len);
         try {
-            vespalib::Gate gate;
-            domain->commit(packet, make_shared<GateCallback>(gate));
-            gate.await();
+            domain->commit(packet);
             ret.AddInt32(0);
             ret.AddString("ok");
         } catch (const std::exception & e) {
diff --git a/searchlib/src/vespa/searchlib/transactionlog/translogserver.h b/searchlib/src/vespa/searchlib/transactionlog/translogserver.h
index 83627d2d3e3..d78d3d39887 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/translogserver.h
+++ b/searchlib/src/vespa/searchlib/transactionlog/translogserver.h
@@ -22,15 +22,16 @@ public:
     typedef std::shared_ptr<TransLogServer> SP;
 
     TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
-                   const common::FileHeaderContext &fileHeaderContext, const DomainConfig & cfg, size_t maxThreads);
+                   const common::FileHeaderContext &fileHeaderContext,
+                   uint64_t domainPartSize, size_t maxThreads, DomainPart::Crc defaultCrc);
     TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
-                   const common::FileHeaderContext &fileHeaderContext, const DomainConfig & cfg);
+                   const common::FileHeaderContext &fileHeaderContext, uint64_t domainPartSize);
     TransLogServer(const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
                    const common::FileHeaderContext &fileHeaderContext);
     ~TransLogServer() override;
     DomainStats getDomainStats() const;
+
     void commit(const vespalib::string & domainName, const Packet & packet, DoneCallback done) override;
-    TransLogServer & setDomainConfig(const DomainConfig & cfg);
 
     class Session
     {
@@ -78,7 +79,8 @@ private:
 
     vespalib::string                    _name;
     vespalib::string                    _baseDir;
-    DomainConfig                        _domainConfig;
+    const uint64_t                      _domainPartSize;
+    const DomainPart::Crc               _defaultCrcType;
     vespalib::ThreadStackExecutor       _commitExecutor;
     vespalib::ThreadStackExecutor       _sessionExecutor;
     FastOS_ThreadPool                   _threadPool;
diff --git a/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.cpp b/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.cpp
index de3d72331d6..ff4a402b438 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.cpp
+++ b/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.cpp
@@ -7,17 +7,12 @@
 LOG_SETUP(".translogserverapp");
 
 using search::common::FileHeaderContext;
-using namespace std::chrono_literals;
 
 namespace search::transactionlog {
 
-using LockGuard = std::lock_guard<std::mutex>;
-using std::make_unique;
-
 TransLogServerApp::TransLogServerApp(const config::ConfigUri & tlsConfigUri,
                                      const FileHeaderContext & fileHeaderContext)
-    : _lock(),
-      _tls(),
+    : _tls(),
       _tlsConfig(),
       _tlsConfigFetcher(tlsConfigUri.getContext()),
       _fileHeaderContext(fileHeaderContext)
@@ -28,58 +23,24 @@ TransLogServerApp::TransLogServerApp(const config::ConfigUri & tlsConfigUri,
 
 namespace {
 
-
-Encoding::Crc
-getCrc(searchlib::TranslogserverConfig::Crcmethod type)
+DomainPart::Crc getCrc(searchlib::TranslogserverConfig::Crcmethod crcType)
 {
-    switch (type) {
+    switch (crcType) {
         case searchlib::TranslogserverConfig::ccitt_crc32:
-            return Encoding::Crc::ccitt_crc32;
+            return DomainPart::ccitt_crc32;
         case searchlib::TranslogserverConfig::xxh64:
-            return Encoding::Crc::xxh64;
-    }
-    return Encoding::Crc::xxh64;
-}
-
-Encoding::Compression
-getCompression(searchlib::TranslogserverConfig::Compression::Type type)
-{
-    switch (type) {
-        case searchlib::TranslogserverConfig::Compression::NONE:
-            return Encoding::Compression::none;
-        case searchlib::TranslogserverConfig::Compression::LZ4:
-            return Encoding::Compression::lz4;
-        case searchlib::TranslogserverConfig::Compression::ZSTD:
-            return Encoding::Compression::zstd;
+            return DomainPart::xxh64;
     }
-    return Encoding::Compression::lz4;
-}
-
-Encoding
-getEncoding(const searchlib::TranslogserverConfig & cfg)
-{
-    return Encoding(getCrc(cfg.crcmethod), getCompression(cfg.compression.type));
-}
-
-DomainConfig
-getDomainConfig(const searchlib::TranslogserverConfig & cfg) {
-    DomainConfig dcfg;
-    dcfg.setEncoding(getEncoding(cfg))
-        .setCompressionLevel(cfg.compression.level)
-        .setPartSizeLimit(cfg.filesizemax)
-        .setChunkSizeLimit(cfg.chunk.sizelimit)
-        .setChunkAgeLimit(std::chrono::microseconds(int64_t(cfg.chunk.agelimit*1000000)));
-    return dcfg;
+    abort();
 }
 
 }
 
 void TransLogServerApp::start()
 {
-    LockGuard guard(_lock);
-    auto c = _tlsConfig.get();
-    _tls = make_unique<TransLogServer>(c->servername, c->listenport, c->basedir, _fileHeaderContext,
-                                       getDomainConfig(*c), c->maxthreads);
+    std::shared_ptr<searchlib::TranslogserverConfig> c = _tlsConfig.get();
+    _tls.reset(new TransLogServer(c->servername, c->listenport, c->basedir, _fileHeaderContext,
+                                  c->filesizemax, c->maxthreads, getCrc(c->crcmethod)));
 }
 
 TransLogServerApp::~TransLogServerApp()
@@ -90,12 +51,8 @@ TransLogServerApp::~TransLogServerApp()
 void TransLogServerApp::configure(std::unique_ptr<searchlib::TranslogserverConfig> cfg)
 {
     LOG(config, "configure Transaction Log Server %s at port %d", cfg->servername.c_str(), cfg->listenport);
-    LockGuard guard(_lock);
     _tlsConfig.set(cfg.release());
     _tlsConfig.latch();
-    if (_tls) {
-        _tls->setDomainConfig(getDomainConfig(*cfg));
-    }
 }
 
 }
diff --git a/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.h b/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.h
index ea6d0158cec..35fa994d1e4 100644
--- a/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.h
+++ b/searchlib/src/vespa/searchlib/transactionlog/translogserverapp.h
@@ -14,7 +14,6 @@ namespace search::transactionlog {
 class TransLogServerApp : public config::IFetcherCallback<searchlib::TranslogserverConfig>
 {
 private:
-    std::mutex                                           _lock;
     TransLogServer::SP                                   _tls;
     vespalib::PtrHolder<searchlib::TranslogserverConfig> _tlsConfig;
     config::ConfigFetcher                                _tlsConfigFetcher;
diff --git a/vespalib/src/vespa/vespalib/objects/nbostream.h b/vespalib/src/vespa/vespalib/objects/nbostream.h
index 8eb42ddfd53..70a590f79d1 100644
--- a/vespalib/src/vespa/vespalib/objects/nbostream.h
+++ b/vespalib/src/vespa/vespalib/objects/nbostream.h
@@ -20,7 +20,7 @@ class nbostream
  public:
     using Buffer = Array<char>;
     using Alloc = alloc::Alloc;
-    enum State { ok=0, eof=0x01, oob=0x02};
+    enum State { ok=0, eof=0x01};
     nbostream(size_t initialSize=1024);
 protected:
     nbostream(const void * buf, size_t sz, bool longLivedBuffer);
@@ -145,7 +145,6 @@ public:
     const char * peek() const { return &_rbuf[_rp]; }
     size_t rp() const { return _rp; }
     nbostream & rp(size_t pos) { if (pos > _wp) fail(eof); _rp = pos; return *this; }
-    nbostream & wp(size_t pos) { if (pos > _wbuf.size()) fail(oob); _wp = pos; return *this; }
     size_t wp() const { return _wp; }
     State state() const { return _state; }
     bool good() const { return _state == ok; }