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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/searchcorespi/index/disk_indexes.h>
#include <vespa/searchcorespi/index/index_disk_dir.h>
#include <vespa/searchcorespi/index/indexdisklayout.h>
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/vespalib/gtest/gtest.h>
#include <filesystem>
#include <fstream>
namespace {
vespalib::string base_dir("base");
constexpr uint32_t block_size = 4_Ki;
}
namespace searchcorespi::index {
class DiskIndexesTest : public ::testing::Test,
public DiskIndexes
{
IndexDiskLayout _layout;
protected:
DiskIndexesTest();
~DiskIndexesTest();
static IndexDiskDir get_index_disk_dir(const vespalib::string& dir) {
return IndexDiskLayout::get_index_disk_dir(dir);
}
void assert_transient_size(uint64_t exp, IndexDiskDir index_disk_dir) {
EXPECT_EQ(exp, get_transient_size(_layout, index_disk_dir));
}
};
DiskIndexesTest::DiskIndexesTest()
: ::testing::Test(),
DiskIndexes(),
_layout(base_dir)
{
}
DiskIndexesTest::~DiskIndexesTest() = default;
TEST_F(DiskIndexesTest, simple_set_active_works)
{
EXPECT_FALSE(isActive("index.flush.1"));
setActive("index.flush.1", 0);
EXPECT_TRUE(isActive("index.flush.1"));
notActive("index.flush.1");
EXPECT_FALSE(isActive("index.flush.1"));
}
TEST_F(DiskIndexesTest, nested_set_active_works)
{
setActive("index.flush.1", 0);
setActive("index.flush.1", 0);
EXPECT_TRUE(isActive("index.flush.1"));
notActive("index.flush.1");
EXPECT_TRUE(isActive("index.flush.1"));
notActive("index.flush.1");
EXPECT_FALSE(isActive("index.flush.1"));
}
TEST_F(DiskIndexesTest, is_active_returns_false_for_bad_name)
{
EXPECT_FALSE(isActive("foo/bar/baz"));
EXPECT_FALSE(isActive("index.flush.0"));
}
TEST_F(DiskIndexesTest, remove_works)
{
EXPECT_TRUE(remove(IndexDiskDir()));
auto fusion1 = get_index_disk_dir("index.fusion.1");
EXPECT_TRUE(remove(fusion1));
add_not_active(fusion1);
EXPECT_TRUE(remove(fusion1));
setActive("index.fusion.1", 0);
EXPECT_FALSE(remove(fusion1));
notActive("index.fusion.1");
EXPECT_TRUE(remove(fusion1));
}
TEST_F(DiskIndexesTest, basic_get_transient_size_works)
{
/*
* When starting to use a new fusion index, we have a transient
* period with two ISearchableIndexCollection instances:
* - old, containing index.fusion.1 and index.flush.2
* - new, containing index.fusion.2
*/
setActive("index.fusion.1", 1000000);
setActive("index.flush.2", 500000);
setActive("index.fusion.2", 1200000);
auto fusion1 = get_index_disk_dir("index.fusion.1");
auto flush2 = get_index_disk_dir("index.flush.2");
auto fusion2 = get_index_disk_dir("index.fusion.2");
{
/*
* When using the old index collection, disk space used by
* index.fusion.2 is considered transient.
*/
SCOPED_TRACE("index.fusion.1");
assert_transient_size(1200000, fusion1);
}
{
SCOPED_TRACE("index.flush.2");
assert_transient_size(0, flush2);
}
{
/*
* When using the new index collection, disk space used by
* index.fusion.1 and index.flush.2 is considered transient.
*/
SCOPED_TRACE("index.fusion.2");
assert_transient_size(1500000, fusion2);
}
notActive("index.fusion.1");
notActive("index.flush.2");
{
/*
* old index collection removed.
*/
SCOPED_TRACE("index.fusion.2 after remove of index.fusion.1 and index.flush.1");
assert_transient_size(0, fusion2);
}
}
TEST_F(DiskIndexesTest, get_transient_size_during_ongoing_fusion)
{
/*
* During ongoing fusion, we have one ISearchableIndexCollection instance:
* - old, containing index.fusion.1 and index.flush.2
*
* Fusion output directory is index.fusion.2
*/
setActive("index.fusion.1", 1000000);
setActive("index.flush.2", 500000);
auto fusion1 = get_index_disk_dir("index.fusion.1");
auto fusion2 = get_index_disk_dir("index.fusion.2");
add_not_active(fusion2); // start tracking disk space for fusion output
{
/*
* Fusion not yet started.
*/
SCOPED_TRACE("dir missing");
assert_transient_size(0, fusion1);
}
auto dir = base_dir + "/index.fusion.2";
std::filesystem::create_directories(std::filesystem::path(dir));
{
/*
* Fusion started, but no files written yet.
*/
SCOPED_TRACE("empty dir");
assert_transient_size(0, fusion1);
}
constexpr uint32_t seek_pos = 999999;
{
std::string name = dir + "/foo";
std::ofstream ostr(name, std::ios::binary);
ostr.seekp(seek_pos);
ostr.write(" ", 1);
ostr.flush();
ostr.close();
}
{
/*
* Fusion started, one file written.
*/
SCOPED_TRACE("single file");
assert_transient_size((seek_pos + block_size) / block_size * block_size, fusion1);
}
EXPECT_TRUE(remove(fusion2)); // stop tracking disk space for fusion output
{
/*
* Fusion aborted.
*/
SCOPED_TRACE("removed");
assert_transient_size(0, fusion1);
}
}
}
int
main(int argc, char* argv[])
{
std::filesystem::remove_all(std::filesystem::path(base_dir));
::testing::InitGoogleTest(&argc, argv);
auto result = RUN_ALL_TESTS();
std::filesystem::remove_all(std::filesystem::path(base_dir));
return result;
}
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