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rocksdb/db/blob/blob_file_cache_test.cc

268 lines
9.2 KiB

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "db/blob/blob_file_cache.h"
#include <cassert>
#include <string>
#include "db/blob/blob_log_format.h"
#include "db/blob/blob_log_writer.h"
#include "env/mock_env.h"
#include "file/filename.h"
#include "file/read_write_util.h"
#include "file/writable_file_writer.h"
#include "options/cf_options.h"
#include "rocksdb/cache.h"
#include "rocksdb/env.h"
#include "rocksdb/file_system.h"
#include "rocksdb/options.h"
#include "rocksdb/statistics.h"
#include "test_util/sync_point.h"
#include "test_util/testharness.h"
namespace ROCKSDB_NAMESPACE {
namespace {
// Creates a test blob file with a single blob in it.
void WriteBlobFile(uint32_t column_family_id,
const ImmutableOptions& immutable_options,
uint64_t blob_file_number) {
assert(!immutable_options.cf_paths.empty());
const std::string blob_file_path =
BlobFileName(immutable_options.cf_paths.front().path, blob_file_number);
std::unique_ptr<FSWritableFile> file;
ASSERT_OK(NewWritableFile(immutable_options.fs.get(), blob_file_path, &file,
FileOptions()));
std::unique_ptr<WritableFileWriter> file_writer(new WritableFileWriter(
std::move(file), blob_file_path, FileOptions(), immutable_options.clock));
constexpr Statistics* statistics = nullptr;
constexpr bool use_fsync = false;
constexpr bool do_flush = false;
BlobLogWriter blob_log_writer(std::move(file_writer), immutable_options.clock,
statistics, blob_file_number, use_fsync,
do_flush);
constexpr bool has_ttl = false;
constexpr ExpirationRange expiration_range;
BlobLogHeader header(column_family_id, kNoCompression, has_ttl,
expiration_range);
ASSERT_OK(blob_log_writer.WriteHeader(header));
constexpr char key[] = "key";
constexpr char blob[] = "blob";
std::string compressed_blob;
uint64_t key_offset = 0;
uint64_t blob_offset = 0;
ASSERT_OK(blob_log_writer.AddRecord(key, blob, &key_offset, &blob_offset));
BlobLogFooter footer;
footer.blob_count = 1;
footer.expiration_range = expiration_range;
std::string checksum_method;
std::string checksum_value;
ASSERT_OK(
blob_log_writer.AppendFooter(footer, &checksum_method, &checksum_value));
}
} // anonymous namespace
class BlobFileCacheTest : public testing::Test {
protected:
BlobFileCacheTest() { mock_env_.reset(MockEnv::Create(Env::Default())); }
std::unique_ptr<Env> mock_env_;
};
TEST_F(BlobFileCacheTest, GetBlobFileReader) {
Options options;
options.env = mock_env_.get();
options.statistics = CreateDBStatistics();
options.cf_paths.emplace_back(
test::PerThreadDBPath(mock_env_.get(),
"BlobFileCacheTest_GetBlobFileReader"),
0);
options.enable_blob_files = true;
constexpr uint32_t column_family_id = 1;
ImmutableOptions immutable_options(options);
constexpr uint64_t blob_file_number = 123;
WriteBlobFile(column_family_id, immutable_options, blob_file_number);
constexpr size_t capacity = 10;
std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
FileOptions file_options;
constexpr HistogramImpl* blob_file_read_hist = nullptr;
BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
&file_options, column_family_id,
blob_file_read_hist, nullptr /*IOTracer*/);
// First try: reader should be opened and put in cache
CacheHandleGuard<BlobFileReader> first;
ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &first));
ASSERT_NE(first.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
// Second try: reader should be served from cache
CacheHandleGuard<BlobFileReader> second;
ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &second));
ASSERT_NE(second.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
ASSERT_EQ(first.GetValue(), second.GetValue());
}
TEST_F(BlobFileCacheTest, GetBlobFileReader_Race) {
Options options;
options.env = mock_env_.get();
options.statistics = CreateDBStatistics();
options.cf_paths.emplace_back(
test::PerThreadDBPath(mock_env_.get(),
"BlobFileCacheTest_GetBlobFileReader_Race"),
0);
options.enable_blob_files = true;
constexpr uint32_t column_family_id = 1;
ImmutableOptions immutable_options(options);
constexpr uint64_t blob_file_number = 123;
WriteBlobFile(column_family_id, immutable_options, blob_file_number);
constexpr size_t capacity = 10;
std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
FileOptions file_options;
constexpr HistogramImpl* blob_file_read_hist = nullptr;
BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
&file_options, column_family_id,
blob_file_read_hist, nullptr /*IOTracer*/);
CacheHandleGuard<BlobFileReader> first;
CacheHandleGuard<BlobFileReader> second;
SyncPoint::GetInstance()->SetCallBack(
"BlobFileCache::GetBlobFileReader:DoubleCheck", [&](void* /* arg */) {
// Disabling sync points to prevent infinite recursion
SyncPoint::GetInstance()->DisableProcessing();
ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &second));
ASSERT_NE(second.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
});
SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &first));
ASSERT_NE(first.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
ASSERT_EQ(first.GetValue(), second.GetValue());
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_F(BlobFileCacheTest, GetBlobFileReader_IOError) {
Options options;
options.env = mock_env_.get();
options.statistics = CreateDBStatistics();
options.cf_paths.emplace_back(
test::PerThreadDBPath(mock_env_.get(),
"BlobFileCacheTest_GetBlobFileReader_IOError"),
0);
options.enable_blob_files = true;
constexpr size_t capacity = 10;
std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
ImmutableOptions immutable_options(options);
FileOptions file_options;
constexpr uint32_t column_family_id = 1;
constexpr HistogramImpl* blob_file_read_hist = nullptr;
BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
&file_options, column_family_id,
blob_file_read_hist, nullptr /*IOTracer*/);
// Note: there is no blob file with the below number
constexpr uint64_t blob_file_number = 123;
CacheHandleGuard<BlobFileReader> reader;
ASSERT_TRUE(
blob_file_cache.GetBlobFileReader(blob_file_number, &reader).IsIOError());
ASSERT_EQ(reader.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 1);
}
TEST_F(BlobFileCacheTest, GetBlobFileReader_CacheFull) {
Options options;
options.env = mock_env_.get();
options.statistics = CreateDBStatistics();
options.cf_paths.emplace_back(
test::PerThreadDBPath(mock_env_.get(),
"BlobFileCacheTest_GetBlobFileReader_CacheFull"),
0);
options.enable_blob_files = true;
constexpr uint32_t column_family_id = 1;
ImmutableOptions immutable_options(options);
constexpr uint64_t blob_file_number = 123;
WriteBlobFile(column_family_id, immutable_options, blob_file_number);
constexpr size_t capacity = 0;
constexpr int num_shard_bits = -1; // determined automatically
constexpr bool strict_capacity_limit = true;
std::shared_ptr<Cache> backing_cache =
NewLRUCache(capacity, num_shard_bits, strict_capacity_limit);
FileOptions file_options;
constexpr HistogramImpl* blob_file_read_hist = nullptr;
BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
&file_options, column_family_id,
blob_file_read_hist, nullptr /*IOTracer*/);
// Insert into cache should fail since it has zero capacity and
// strict_capacity_limit is set
CacheHandleGuard<BlobFileReader> reader;
ASSERT_TRUE(blob_file_cache.GetBlobFileReader(blob_file_number, &reader)
.IsIncomplete());
ASSERT_EQ(reader.GetValue(), nullptr);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 1);
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}