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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "compacter.h"
#include "logdatastore.h"
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/vespalib/util/array.hpp>
#include <cinttypes>
#include <vespa/log/log.h>
LOG_SETUP(".searchlib.docstore.compacter");
namespace search::docstore {
using vespalib::alloc::Alloc;
namespace {
static constexpr size_t INITIAL_BACKING_BUFFER_SIZE = 64_Mi;
}
void
Compacter::write(LockGuard guard, uint32_t chunkId, uint32_t lid, const void *buffer, size_t sz) {
(void) chunkId;
FileChunk::FileId fileId= _ds.getActiveFileId(guard);
_ds.write(std::move(guard), fileId, lid, buffer, sz);
}
BucketCompacter::BucketCompacter(size_t maxSignificantBucketBits, CompressionConfig compression, LogDataStore & ds,
Executor & executor, const IBucketizer & bucketizer, FileId source, FileId destination) :
_unSignificantBucketBits((maxSignificantBucketBits > 8) ? (maxSignificantBucketBits - 8) : 0),
_sourceFileId(source),
_destinationFileId(destination),
_ds(ds),
_bucketizer(bucketizer),
_writeCount(0),
_maxBucketGuardDuration(vespalib::duration::zero()),
_lastSample(vespalib::steady_clock::now()),
_lock(),
_backingMemory(Alloc::alloc(INITIAL_BACKING_BUFFER_SIZE), &_lock),
_tmpStore(),
_lidGuard(ds.getLidReadGuard()),
_bucketizerGuard(),
_stat()
{
_tmpStore.reserve(256);
for (size_t i(0); i < 256; i++) {
_tmpStore.emplace_back(_backingMemory, executor, compression);
}
}
FileChunk::FileId
BucketCompacter::getDestinationId(const LockGuard & guard) const {
return (_destinationFileId.isActive()) ? _ds.getActiveFileId(guard) : _destinationFileId;
}
void
BucketCompacter::write(LockGuard guard, uint32_t chunkId, uint32_t lid, const void *buffer, size_t sz)
{
if (_writeCount++ == 0) {
_bucketizerGuard = _bucketizer.getGuard();
_lastSample = vespalib::steady_clock::now();
}
guard.unlock();
BucketId bucketId = (sz > 0) ? _bucketizer.getBucketOf(_bucketizerGuard, lid) : BucketId();
uint64_t sortableBucketId = bucketId.toKey();
_tmpStore[(sortableBucketId >> _unSignificantBucketBits) % _tmpStore.size()].add(bucketId, chunkId, lid, buffer, sz);
if ((_writeCount % 1000) == 0) {
_bucketizerGuard = _bucketizer.getGuard();
vespalib::steady_time now = vespalib::steady_clock::now();
_maxBucketGuardDuration = std::max(_maxBucketGuardDuration, now - _lastSample);
_lastSample = now;
}
}
void
BucketCompacter::close()
{
_bucketizerGuard = GenerationHandler::Guard();
vespalib::duration lastBucketGuardDuration = vespalib::steady_clock::now() - _lastSample;
size_t lidCount1(0);
size_t bucketCount(0);
size_t chunkCount(0);
for (const StoreByBucket & store : _tmpStore) {
lidCount1 += store.getLidCount();
bucketCount += store.getBucketCount();
chunkCount += store.getChunkCount();
}
LOG(info, "Have read %ld lids and placed them in %ld buckets. Temporary compressed in %ld chunks."
" Max bucket guard held for %" PRId64 " us, and last before close for %" PRId64 " us",
lidCount1, bucketCount, chunkCount, vespalib::count_us(_maxBucketGuardDuration), vespalib::count_us(lastBucketGuardDuration));
for (StoreByBucket & store : _tmpStore) {
store.drain(*this);
}
_backingMemory.clear();
size_t lidCount(0);
for (const auto & it : _stat) {
lidCount += it.second;
}
LOG(info, "Compacted %ld lids into %ld buckets", lidCount, _stat.size());
}
void
BucketCompacter::write(BucketId bucketId, uint32_t chunkId, uint32_t lid, const void *buffer, size_t sz)
{
_stat[bucketId.getId()]++;
LockGuard guard(_ds.getLidGuard(lid));
LidInfo lidInfo(_sourceFileId.getId(), chunkId, sz);
if (_ds.getLid(_lidGuard, lid) == lidInfo) {
FileId fileId = getDestinationId(guard);
_ds.write(std::move(guard), fileId, lid, buffer, sz);
}
}
}
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