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rocksdb/db/blob/db_blob_basic_test.cc
Yanqin Jin b92cef2d1d Sort per-file blob read requests by offset (#8953) 
Summary:
`RandomAccessFileReader::MultiRead()` tries to merge requests in direct IO, assuming input IO requests are
sorted by offsets.

Add a test in direct IO mode.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8953

Test Plan: make check

Reviewed By: ltamasi

Differential Revision: D31183546

Pulled By: riversand963

fbshipit-source-id: 5d043ec68e2daa47a3149066150afd41ee3d73e6
2021-09-24 22:14:30 -07:00

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// 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 <array>
#include <sstream>
#include "db/blob/blob_index.h"
#include "db/blob/blob_log_format.h"
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "test_util/sync_point.h"
#include "utilities/fault_injection_env.h"
namespace ROCKSDB_NAMESPACE {
class DBBlobBasicTest : public DBTestBase {
protected:
DBBlobBasicTest()
: DBTestBase("db_blob_basic_test", /* env_do_fsync */ false) {}
};
TEST_F(DBBlobBasicTest, GetBlob) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key[] = "key";
constexpr char blob_value[] = "blob_value";
ASSERT_OK(Put(key, blob_value));
ASSERT_OK(Flush());
ASSERT_EQ(Get(key), blob_value);
// Try again with no I/O allowed. The table and the necessary blocks should
// already be in their respective caches; however, the blob itself can only be
// read from the blob file, so the read should return Incomplete.
ReadOptions read_options;
read_options.read_tier = kBlockCacheTier;
PinnableSlice result;
ASSERT_TRUE(db_->Get(read_options, db_->DefaultColumnFamily(), key, &result)
.IsIncomplete());
}
TEST_F(DBBlobBasicTest, MultiGetBlobs) {
constexpr size_t min_blob_size = 6;
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = min_blob_size;
Reopen(options);
// Put then retrieve three key-values. The first value is below the size limit
// and is thus stored inline; the other two are stored separately as blobs.
constexpr size_t num_keys = 3;
constexpr char first_key[] = "first_key";
constexpr char first_value[] = "short";
static_assert(sizeof(first_value) - 1 < min_blob_size,
"first_value too long to be inlined");
ASSERT_OK(Put(first_key, first_value));
constexpr char second_key[] = "second_key";
constexpr char second_value[] = "long_value";
static_assert(sizeof(second_value) - 1 >= min_blob_size,
"second_value too short to be stored as blob");
ASSERT_OK(Put(second_key, second_value));
constexpr char third_key[] = "third_key";
constexpr char third_value[] = "other_long_value";
static_assert(sizeof(third_value) - 1 >= min_blob_size,
"third_value too short to be stored as blob");
ASSERT_OK(Put(third_key, third_value));
ASSERT_OK(Flush());
ReadOptions read_options;
std::array<Slice, num_keys> keys{{first_key, second_key, third_key}};
{
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
db_->MultiGet(read_options, db_->DefaultColumnFamily(), num_keys, &keys[0],
&values[0], &statuses[0]);
ASSERT_OK(statuses[0]);
ASSERT_EQ(values[0], first_value);
ASSERT_OK(statuses[1]);
ASSERT_EQ(values[1], second_value);
ASSERT_OK(statuses[2]);
ASSERT_EQ(values[2], third_value);
}
// Try again with no I/O allowed. The table and the necessary blocks should
// already be in their respective caches. The first (inlined) value should be
// successfully read; however, the two blob values could only be read from the
// blob file, so for those the read should return Incomplete.
read_options.read_tier = kBlockCacheTier;
{
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
db_->MultiGet(read_options, db_->DefaultColumnFamily(), num_keys, &keys[0],
&values[0], &statuses[0]);
ASSERT_OK(statuses[0]);
ASSERT_EQ(values[0], first_value);
ASSERT_TRUE(statuses[1].IsIncomplete());
ASSERT_TRUE(statuses[2].IsIncomplete());
}
}
#ifndef ROCKSDB_LITE
TEST_F(DBBlobBasicTest, MultiGetWithDirectIO) {
Options options = GetDefaultOptions();
// First, create an external SST file ["b"].
const std::string file_path = dbname_ + "/test.sst";
{
SstFileWriter sst_file_writer(EnvOptions(), GetDefaultOptions());
Status s = sst_file_writer.Open(file_path);
ASSERT_OK(s);
ASSERT_OK(sst_file_writer.Put("b", "b_value"));
ASSERT_OK(sst_file_writer.Finish());
}
options.enable_blob_files = true;
options.min_blob_size = 1000;
options.use_direct_reads = true;
options.allow_ingest_behind = true;
// Open DB with fixed-prefix sst-partitioner so that compaction will cut
// new table file when encountering a new key whose 1-byte prefix changes.
constexpr size_t key_len = 1;
options.sst_partitioner_factory =
NewSstPartitionerFixedPrefixFactory(key_len);
Status s = TryReopen(options);
if (s.IsInvalidArgument()) {
ROCKSDB_GTEST_SKIP("This test requires direct IO support");
return;
}
ASSERT_OK(s);
constexpr size_t num_keys = 3;
constexpr size_t blob_size = 3000;
constexpr char first_key[] = "a";
const std::string first_blob(blob_size, 'a');
ASSERT_OK(Put(first_key, first_blob));
constexpr char second_key[] = "b";
const std::string second_blob(2 * blob_size, 'b');
ASSERT_OK(Put(second_key, second_blob));
constexpr char third_key[] = "d";
const std::string third_blob(blob_size, 'd');
ASSERT_OK(Put(third_key, third_blob));
// first_blob, second_blob and third_blob in the same blob file.
// SST Blob file
// L0 ["a", "b", "d"] |'aaaa', 'bbbb', 'dddd'|
// | | | ^ ^ ^
// | | | | | |
// | | +---------|-------|--------+
// | +-----------------|-------+
// +-------------------------+
ASSERT_OK(Flush());
constexpr char fourth_key[] = "c";
const std::string fourth_blob(blob_size, 'c');
ASSERT_OK(Put(fourth_key, fourth_blob));
// fourth_blob in another blob file.
// SST Blob file SST Blob file
// L0 ["a", "b", "d"] |'aaaa', 'bbbb', 'dddd'| ["c"] |'cccc'|
// | | | ^ ^ ^ | ^
// | | | | | | | |
// | | +---------|-------|--------+ +-------+
// | +-----------------|-------+
// +-------------------------+
ASSERT_OK(Flush());
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), /*begin=*/nullptr,
/*end=*/nullptr));
// Due to the above sst partitioner, we get 4 L1 files. The blob files are
// unchanged.
// |'aaaa', 'bbbb', 'dddd'| |'cccc'|
// ^ ^ ^ ^
// | | | |
// L0 | | | |
// L1 ["a"] ["b"] ["c"] | | ["d"] |
// | | | | | |
// | | +---------|-------|---------------+
// | +-----------------|-------+
// +-------------------------+
ASSERT_EQ(4, NumTableFilesAtLevel(/*level=*/1));
{
// Ingest the external SST file into bottommost level.
std::vector<std::string> ext_files{file_path};
IngestExternalFileOptions opts;
opts.ingest_behind = true;
ASSERT_OK(
db_->IngestExternalFile(db_->DefaultColumnFamily(), ext_files, opts));
}
// Now the database becomes as follows.
// |'aaaa', 'bbbb', 'dddd'| |'cccc'|
// ^ ^ ^ ^
// | | | |
// L0 | | | |
// L1 ["a"] ["b"] ["c"] | | ["d"] |
// | | | | | |
// | | +---------|-------|---------------+
// | +-----------------|-------+
// +-------------------------+
//
// L6 ["b"]
{
// Compact ["b"] to bottommost level.
Slice begin = Slice(second_key);
Slice end = Slice(second_key);
CompactRangeOptions cro;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForce;
ASSERT_OK(db_->CompactRange(cro, &begin, &end));
}
// |'aaaa', 'bbbb', 'dddd'| |'cccc'|
// ^ ^ ^ ^
// | | | |
// L0 | | | |
// L1 ["a"] ["c"] | | ["d"] |
// | | | | |
// | +---------|-------|---------------+
// | +-----------------|-------+
// +-------|-----------------+
// |
// L6 ["b"]
ASSERT_EQ(3, NumTableFilesAtLevel(/*level=*/1));
ASSERT_EQ(1, NumTableFilesAtLevel(/*level=*/6));
bool called = false;
SyncPoint::GetInstance()->ClearAllCallBacks();
SyncPoint::GetInstance()->SetCallBack(
"RandomAccessFileReader::MultiRead:AlignedReqs", [&](void* arg) {
auto* aligned_reqs = static_cast<std::vector<FSReadRequest>*>(arg);
assert(aligned_reqs);
ASSERT_EQ(1, aligned_reqs->size());
called = true;
});
SyncPoint::GetInstance()->EnableProcessing();
std::array<Slice, num_keys> keys{{first_key, third_key, second_key}};
{
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
// The MultiGet(), when constructing the KeyContexts, will process the keys
// in such order: a, d, b. The reason is that ["a"] and ["d"] are in L1,
// while ["b"] resides in L6.
// Consequently, the original FSReadRequest list prepared by
// Version::MultiGetblob() will be for "a", "d" and "b". It is unsorted as
// follows:
//
// ["a", offset=30, len=3033],
// ["d", offset=9096, len=3033],
// ["b", offset=3063, len=6033]
//
// If we do not sort them before calling MultiRead() in DirectIO, then the
// underlying IO merging logic will yield two requests.
//
// [offset=0, len=4096] (for "a")
// [offset=0, len=12288] (result of merging the request for "d" and "b")
//
// We need to sort them in Version::MultiGetBlob() so that the underlying
// IO merging logic in DirectIO mode works as expected. The correct
// behavior will be one aligned request:
//
// [offset=0, len=12288]
db_->MultiGet(ReadOptions(), db_->DefaultColumnFamily(), num_keys, &keys[0],
&values[0], &statuses[0]);
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
ASSERT_TRUE(called);
ASSERT_OK(statuses[0]);
ASSERT_EQ(values[0], first_blob);
ASSERT_OK(statuses[1]);
ASSERT_EQ(values[1], third_blob);
ASSERT_OK(statuses[2]);
ASSERT_EQ(values[2], second_blob);
}
}
#endif // !ROCKSDB_LITE
TEST_F(DBBlobBasicTest, MultiGetBlobsFromMultipleFiles) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr size_t kNumBlobFiles = 3;
constexpr size_t kNumBlobsPerFile = 3;
constexpr size_t kNumKeys = kNumBlobsPerFile * kNumBlobFiles;
std::vector<std::string> key_strs;
std::vector<std::string> value_strs;
for (size_t i = 0; i < kNumBlobFiles; ++i) {
for (size_t j = 0; j < kNumBlobsPerFile; ++j) {
std::string key = "key" + std::to_string(i) + "_" + std::to_string(j);
std::string value =
"value_as_blob" + std::to_string(i) + "_" + std::to_string(j);
ASSERT_OK(Put(key, value));
key_strs.push_back(key);
value_strs.push_back(value);
}
ASSERT_OK(Flush());
}
assert(key_strs.size() == kNumKeys);
std::array<Slice, kNumKeys> keys;
for (size_t i = 0; i < keys.size(); ++i) {
keys[i] = key_strs[i];
}
std::array<PinnableSlice, kNumKeys> values;
std::array<Status, kNumKeys> statuses;
db_->MultiGet(ReadOptions(), db_->DefaultColumnFamily(), kNumKeys, &keys[0],
&values[0], &statuses[0]);
for (size_t i = 0; i < kNumKeys; ++i) {
ASSERT_OK(statuses[i]);
ASSERT_EQ(value_strs[i], values[i]);
}
}
TEST_F(DBBlobBasicTest, GetBlob_CorruptIndex) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key[] = "key";
// Fake a corrupt blob index.
const std::string blob_index("foobar");
WriteBatch batch;
ASSERT_OK(WriteBatchInternal::PutBlobIndex(&batch, 0, key, blob_index));
ASSERT_OK(db_->Write(WriteOptions(), &batch));
ASSERT_OK(Flush());
PinnableSlice result;
ASSERT_TRUE(db_->Get(ReadOptions(), db_->DefaultColumnFamily(), key, &result)
.IsCorruption());
}
TEST_F(DBBlobBasicTest, MultiGetBlob_CorruptIndex) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
options.create_if_missing = true;
DestroyAndReopen(options);
constexpr size_t kNumOfKeys = 3;
std::array<std::string, kNumOfKeys> key_strs;
std::array<std::string, kNumOfKeys> value_strs;
std::array<Slice, kNumOfKeys + 1> keys;
for (size_t i = 0; i < kNumOfKeys; ++i) {
key_strs[i] = "foo" + std::to_string(i);
value_strs[i] = "blob_value" + std::to_string(i);
ASSERT_OK(Put(key_strs[i], value_strs[i]));
keys[i] = key_strs[i];
}
constexpr char key[] = "key";
{
// Fake a corrupt blob index.
const std::string blob_index("foobar");
WriteBatch batch;
ASSERT_OK(WriteBatchInternal::PutBlobIndex(&batch, 0, key, blob_index));
ASSERT_OK(db_->Write(WriteOptions(), &batch));
keys[kNumOfKeys] = Slice(static_cast<const char*>(key), sizeof(key) - 1);
}
ASSERT_OK(Flush());
std::array<PinnableSlice, kNumOfKeys + 1> values;
std::array<Status, kNumOfKeys + 1> statuses;
db_->MultiGet(ReadOptions(), dbfull()->DefaultColumnFamily(), kNumOfKeys + 1,
keys.data(), values.data(), statuses.data(),
/*sorted_input=*/false);
for (size_t i = 0; i < kNumOfKeys + 1; ++i) {
if (i != kNumOfKeys) {
ASSERT_OK(statuses[i]);
ASSERT_EQ("blob_value" + std::to_string(i), values[i]);
} else {
ASSERT_TRUE(statuses[i].IsCorruption());
}
}
}
TEST_F(DBBlobBasicTest, MultiGetBlob_ExceedSoftLimit) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr size_t kNumOfKeys = 3;
std::array<std::string, kNumOfKeys> key_bufs;
std::array<std::string, kNumOfKeys> value_bufs;
std::array<Slice, kNumOfKeys> keys;
for (size_t i = 0; i < kNumOfKeys; ++i) {
key_bufs[i] = "foo" + std::to_string(i);
value_bufs[i] = "blob_value" + std::to_string(i);
ASSERT_OK(Put(key_bufs[i], value_bufs[i]));
keys[i] = key_bufs[i];
}
ASSERT_OK(Flush());
std::array<PinnableSlice, kNumOfKeys> values;
std::array<Status, kNumOfKeys> statuses;
ReadOptions read_opts;
read_opts.value_size_soft_limit = 1;
db_->MultiGet(read_opts, dbfull()->DefaultColumnFamily(), kNumOfKeys,
keys.data(), values.data(), statuses.data(),
/*sorted_input=*/true);
for (const auto& s : statuses) {
ASSERT_TRUE(s.IsAborted());
}
}
TEST_F(DBBlobBasicTest, GetBlob_InlinedTTLIndex) {
constexpr uint64_t min_blob_size = 10;
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = min_blob_size;
Reopen(options);
constexpr char key[] = "key";
constexpr char blob[] = "short";
static_assert(sizeof(short) - 1 < min_blob_size,
"Blob too long to be inlined");
// Fake an inlined TTL blob index.
std::string blob_index;
constexpr uint64_t expiration = 1234567890;
BlobIndex::EncodeInlinedTTL(&blob_index, expiration, blob);
WriteBatch batch;
ASSERT_OK(WriteBatchInternal::PutBlobIndex(&batch, 0, key, blob_index));
ASSERT_OK(db_->Write(WriteOptions(), &batch));
ASSERT_OK(Flush());
PinnableSlice result;
ASSERT_TRUE(db_->Get(ReadOptions(), db_->DefaultColumnFamily(), key, &result)
.IsCorruption());
}
TEST_F(DBBlobBasicTest, GetBlob_IndexWithInvalidFileNumber) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key[] = "key";
// Fake a blob index referencing a non-existent blob file.
std::string blob_index;
constexpr uint64_t blob_file_number = 1000;
constexpr uint64_t offset = 1234;
constexpr uint64_t size = 5678;
BlobIndex::EncodeBlob(&blob_index, blob_file_number, offset, size,
kNoCompression);
WriteBatch batch;
ASSERT_OK(WriteBatchInternal::PutBlobIndex(&batch, 0, key, blob_index));
ASSERT_OK(db_->Write(WriteOptions(), &batch));
ASSERT_OK(Flush());
PinnableSlice result;
ASSERT_TRUE(db_->Get(ReadOptions(), db_->DefaultColumnFamily(), key, &result)
.IsCorruption());
}
#ifndef ROCKSDB_LITE
TEST_F(DBBlobBasicTest, GenerateIOTracing) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
std::string trace_file = dbname_ + "/io_trace_file";
Reopen(options);
{
// Create IO trace file
std::unique_ptr<TraceWriter> trace_writer;
ASSERT_OK(
NewFileTraceWriter(env_, EnvOptions(), trace_file, &trace_writer));
ASSERT_OK(db_->StartIOTrace(TraceOptions(), std::move(trace_writer)));
constexpr char key[] = "key";
constexpr char blob_value[] = "blob_value";
ASSERT_OK(Put(key, blob_value));
ASSERT_OK(Flush());
ASSERT_EQ(Get(key), blob_value);
ASSERT_OK(db_->EndIOTrace());
ASSERT_OK(env_->FileExists(trace_file));
}
{
// Parse trace file to check file operations related to blob files are
// recorded.
std::unique_ptr<TraceReader> trace_reader;
ASSERT_OK(
NewFileTraceReader(env_, EnvOptions(), trace_file, &trace_reader));
IOTraceReader reader(std::move(trace_reader));
IOTraceHeader header;
ASSERT_OK(reader.ReadHeader(&header));
ASSERT_EQ(kMajorVersion, static_cast<int>(header.rocksdb_major_version));
ASSERT_EQ(kMinorVersion, static_cast<int>(header.rocksdb_minor_version));
// Read records.
int blob_files_op_count = 0;
Status status;
while (true) {
IOTraceRecord record;
status = reader.ReadIOOp(&record);
if (!status.ok()) {
break;
}
if (record.file_name.find("blob") != std::string::npos) {
blob_files_op_count++;
}
}
// Assuming blob files will have Append, Close and then Read operations.
ASSERT_GT(blob_files_op_count, 2);
}
}
#endif // !ROCKSDB_LITE
TEST_F(DBBlobBasicTest, BestEffortsRecovery_MissingNewestBlobFile) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
options.create_if_missing = true;
Reopen(options);
ASSERT_OK(dbfull()->DisableFileDeletions());
constexpr int kNumTableFiles = 2;
for (int i = 0; i < kNumTableFiles; ++i) {
for (char ch = 'a'; ch != 'c'; ++ch) {
std::string key(1, ch);
ASSERT_OK(Put(key, "value" + std::to_string(i)));
}
ASSERT_OK(Flush());
}
Close();
std::vector<std::string> files;
ASSERT_OK(env_->GetChildren(dbname_, &files));
std::string blob_file_path;
uint64_t max_blob_file_num = kInvalidBlobFileNumber;
for (const auto& fname : files) {
uint64_t file_num = 0;
FileType type;
if (ParseFileName(fname, &file_num, /*info_log_name_prefix=*/"", &type) &&
type == kBlobFile) {
if (file_num > max_blob_file_num) {
max_blob_file_num = file_num;
blob_file_path = dbname_ + "/" + fname;
}
}
}
ASSERT_OK(env_->DeleteFile(blob_file_path));
options.best_efforts_recovery = true;
Reopen(options);
std::string value;
ASSERT_OK(db_->Get(ReadOptions(), "a", &value));
ASSERT_EQ("value" + std::to_string(kNumTableFiles - 2), value);
}
TEST_F(DBBlobBasicTest, GetMergeBlobWithPut) {
Options options = GetDefaultOptions();
options.merge_operator = MergeOperators::CreateStringAppendOperator();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
ASSERT_OK(Put("Key1", "v1"));
ASSERT_OK(Flush());
ASSERT_OK(Merge("Key1", "v2"));
ASSERT_OK(Flush());
ASSERT_OK(Merge("Key1", "v3"));
ASSERT_OK(Flush());
std::string value;
ASSERT_OK(db_->Get(ReadOptions(), "Key1", &value));
ASSERT_EQ(Get("Key1"), "v1,v2,v3");
}
TEST_F(DBBlobBasicTest, MultiGetMergeBlobWithPut) {
constexpr size_t num_keys = 3;
Options options = GetDefaultOptions();
options.merge_operator = MergeOperators::CreateStringAppendOperator();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
ASSERT_OK(Put("Key0", "v0_0"));
ASSERT_OK(Put("Key1", "v1_0"));
ASSERT_OK(Put("Key2", "v2_0"));
ASSERT_OK(Flush());
ASSERT_OK(Merge("Key0", "v0_1"));
ASSERT_OK(Merge("Key1", "v1_1"));
ASSERT_OK(Flush());
ASSERT_OK(Merge("Key0", "v0_2"));
ASSERT_OK(Flush());
std::array<Slice, num_keys> keys{{"Key0", "Key1", "Key2"}};
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
db_->MultiGet(ReadOptions(), db_->DefaultColumnFamily(), num_keys, &keys[0],
&values[0], &statuses[0]);
ASSERT_OK(statuses[0]);
ASSERT_EQ(values[0], "v0_0,v0_1,v0_2");
ASSERT_OK(statuses[1]);
ASSERT_EQ(values[1], "v1_0,v1_1");
ASSERT_OK(statuses[2]);
ASSERT_EQ(values[2], "v2_0");
}
#ifndef ROCKSDB_LITE
TEST_F(DBBlobBasicTest, Properties) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key1[] = "key1";
constexpr size_t key1_size = sizeof(key1) - 1;
constexpr char key2[] = "key2";
constexpr size_t key2_size = sizeof(key2) - 1;
constexpr char key3[] = "key3";
constexpr size_t key3_size = sizeof(key3) - 1;
constexpr char blob[] = "0000000000";
constexpr size_t blob_size = sizeof(blob) - 1;
ASSERT_OK(Put(key1, blob));
ASSERT_OK(Put(key2, blob));
ASSERT_OK(Flush());
constexpr size_t first_blob_file_expected_size =
BlobLogHeader::kSize +
BlobLogRecord::CalculateAdjustmentForRecordHeader(key1_size) + blob_size +
BlobLogRecord::CalculateAdjustmentForRecordHeader(key2_size) + blob_size +
BlobLogFooter::kSize;
ASSERT_OK(Put(key3, blob));
ASSERT_OK(Flush());
constexpr size_t second_blob_file_expected_size =
BlobLogHeader::kSize +
BlobLogRecord::CalculateAdjustmentForRecordHeader(key3_size) + blob_size +
BlobLogFooter::kSize;
constexpr size_t total_expected_size =
first_blob_file_expected_size + second_blob_file_expected_size;
// Number of blob files
uint64_t num_blob_files = 0;
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kNumBlobFiles, &num_blob_files));
ASSERT_EQ(num_blob_files, 2);
// Total size of live blob files
uint64_t live_blob_file_size = 0;
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kLiveBlobFileSize,
&live_blob_file_size));
ASSERT_EQ(live_blob_file_size, total_expected_size);
// Total size of all blob files across all versions
// Note: this should be the same as above since we only have one
// version at this point.
uint64_t total_blob_file_size = 0;
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kTotalBlobFileSize,
&total_blob_file_size));
ASSERT_EQ(total_blob_file_size, total_expected_size);
// Delete key2 to create some garbage
ASSERT_OK(Delete(key2));
ASSERT_OK(Flush());
constexpr Slice* begin = nullptr;
constexpr Slice* end = nullptr;
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), begin, end));
constexpr size_t expected_garbage_size =
BlobLogRecord::CalculateAdjustmentForRecordHeader(key2_size) + blob_size;
// Blob file stats
std::string blob_stats;
ASSERT_TRUE(db_->GetProperty(DB::Properties::kBlobStats, &blob_stats));
std::ostringstream oss;
oss << "Number of blob files: 2\nTotal size of blob files: "
<< total_expected_size
<< "\nTotal size of garbage in blob files: " << expected_garbage_size
<< '\n';
ASSERT_EQ(blob_stats, oss.str());
}
TEST_F(DBBlobBasicTest, PropertiesMultiVersion) {
Options options = GetDefaultOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key1[] = "key1";
constexpr char key2[] = "key2";
constexpr char key3[] = "key3";
constexpr size_t key_size = sizeof(key1) - 1;
static_assert(sizeof(key2) - 1 == key_size, "unexpected size: key2");
static_assert(sizeof(key3) - 1 == key_size, "unexpected size: key3");
constexpr char blob[] = "0000000000";
constexpr size_t blob_size = sizeof(blob) - 1;
ASSERT_OK(Put(key1, blob));
ASSERT_OK(Flush());
ASSERT_OK(Put(key2, blob));
ASSERT_OK(Flush());
// Create an iterator to keep the current version alive
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
ASSERT_OK(iter->status());
// Note: the Delete and subsequent compaction results in the first blob file
// not making it to the final version. (It is still part of the previous
// version kept alive by the iterator though.) On the other hand, the Put
// results in a third blob file.
ASSERT_OK(Delete(key1));
ASSERT_OK(Put(key3, blob));
ASSERT_OK(Flush());
constexpr Slice* begin = nullptr;
constexpr Slice* end = nullptr;
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), begin, end));
// Total size of all blob files across all versions: between the two versions,
// we should have three blob files of the same size with one blob each.
// The version kept alive by the iterator contains the first and the second
// blob file, while the final version contains the second and the third blob
// file. (The second blob file is thus shared by the two versions but should
// be counted only once.)
uint64_t total_blob_file_size = 0;
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kTotalBlobFileSize,
&total_blob_file_size));
ASSERT_EQ(total_blob_file_size,
3 * (BlobLogHeader::kSize +
BlobLogRecord::CalculateAdjustmentForRecordHeader(key_size) +
blob_size + BlobLogFooter::kSize));
}
#endif // !ROCKSDB_LITE
class DBBlobBasicIOErrorTest : public DBBlobBasicTest,
public testing::WithParamInterface<std::string> {
protected:
DBBlobBasicIOErrorTest() : sync_point_(GetParam()) {
fault_injection_env_.reset(new FaultInjectionTestEnv(env_));
}
~DBBlobBasicIOErrorTest() { Close(); }
std::unique_ptr<FaultInjectionTestEnv> fault_injection_env_;
std::string sync_point_;
};
class DBBlobBasicIOErrorMultiGetTest : public DBBlobBasicIOErrorTest {
public:
DBBlobBasicIOErrorMultiGetTest() : DBBlobBasicIOErrorTest() {}
};
INSTANTIATE_TEST_CASE_P(DBBlobBasicTest, DBBlobBasicIOErrorTest,
::testing::ValuesIn(std::vector<std::string>{
"BlobFileReader::OpenFile:NewRandomAccessFile",
"BlobFileReader::GetBlob:ReadFromFile"}));
INSTANTIATE_TEST_CASE_P(DBBlobBasicTest, DBBlobBasicIOErrorMultiGetTest,
::testing::ValuesIn(std::vector<std::string>{
"BlobFileReader::OpenFile:NewRandomAccessFile",
"BlobFileReader::MultiGetBlob:ReadFromFile"}));
TEST_P(DBBlobBasicIOErrorTest, GetBlob_IOError) {
Options options;
options.env = fault_injection_env_.get();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr char key[] = "key";
constexpr char blob_value[] = "blob_value";
ASSERT_OK(Put(key, blob_value));
ASSERT_OK(Flush());
SyncPoint::GetInstance()->SetCallBack(sync_point_, [this](void* /* arg */) {
fault_injection_env_->SetFilesystemActive(false,
Status::IOError(sync_point_));
});
SyncPoint::GetInstance()->EnableProcessing();
PinnableSlice result;
ASSERT_TRUE(db_->Get(ReadOptions(), db_->DefaultColumnFamily(), key, &result)
.IsIOError());
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_P(DBBlobBasicIOErrorMultiGetTest, MultiGetBlobs_IOError) {
Options options = GetDefaultOptions();
options.env = fault_injection_env_.get();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr size_t num_keys = 2;
constexpr char first_key[] = "first_key";
constexpr char first_value[] = "first_value";
ASSERT_OK(Put(first_key, first_value));
constexpr char second_key[] = "second_key";
constexpr char second_value[] = "second_value";
ASSERT_OK(Put(second_key, second_value));
ASSERT_OK(Flush());
std::array<Slice, num_keys> keys{{first_key, second_key}};
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
SyncPoint::GetInstance()->SetCallBack(sync_point_, [this](void* /* arg */) {
fault_injection_env_->SetFilesystemActive(false,
Status::IOError(sync_point_));
});
SyncPoint::GetInstance()->EnableProcessing();
db_->MultiGet(ReadOptions(), db_->DefaultColumnFamily(), num_keys, &keys[0],
&values[0], &statuses[0]);
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
ASSERT_TRUE(statuses[0].IsIOError());
ASSERT_TRUE(statuses[1].IsIOError());
}
TEST_P(DBBlobBasicIOErrorMultiGetTest, MultipleBlobFiles) {
Options options = GetDefaultOptions();
options.env = fault_injection_env_.get();
options.enable_blob_files = true;
options.min_blob_size = 0;
Reopen(options);
constexpr size_t num_keys = 2;
constexpr char key1[] = "key1";
constexpr char value1[] = "blob1";
ASSERT_OK(Put(key1, value1));
ASSERT_OK(Flush());
constexpr char key2[] = "key2";
constexpr char value2[] = "blob2";
ASSERT_OK(Put(key2, value2));
ASSERT_OK(Flush());
std::array<Slice, num_keys> keys{{key1, key2}};
std::array<PinnableSlice, num_keys> values;
std::array<Status, num_keys> statuses;
bool first_blob_file = true;
SyncPoint::GetInstance()->SetCallBack(
sync_point_, [&first_blob_file, this](void* /* arg */) {
if (first_blob_file) {
first_blob_file = false;
return;
}
fault_injection_env_->SetFilesystemActive(false,
Status::IOError(sync_point_));
});
SyncPoint::GetInstance()->EnableProcessing();
db_->MultiGet(ReadOptions(), db_->DefaultColumnFamily(), num_keys,
keys.data(), values.data(), statuses.data());
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
ASSERT_OK(statuses[0]);
ASSERT_EQ(value1, values[0]);
ASSERT_TRUE(statuses[1].IsIOError());
}
namespace {
class ReadBlobCompactionFilter : public CompactionFilter {
public:
ReadBlobCompactionFilter() = default;
const char* Name() const override {
return "rocksdb.compaction.filter.read.blob";
}
CompactionFilter::Decision FilterV2(
int /*level*/, const Slice& /*key*/, ValueType value_type,
const Slice& existing_value, std::string* new_value,
std::string* /*skip_until*/) const override {
if (value_type != CompactionFilter::ValueType::kValue) {
return CompactionFilter::Decision::kKeep;
}
assert(new_value);
new_value->assign(existing_value.data(), existing_value.size());
return CompactionFilter::Decision::kChangeValue;
}
};
} // anonymous namespace
TEST_P(DBBlobBasicIOErrorTest, CompactionFilterReadBlob_IOError) {
Options options = GetDefaultOptions();
options.env = fault_injection_env_.get();
options.enable_blob_files = true;
options.min_blob_size = 0;
options.create_if_missing = true;
std::unique_ptr<CompactionFilter> compaction_filter_guard(
new ReadBlobCompactionFilter);
options.compaction_filter = compaction_filter_guard.get();
DestroyAndReopen(options);
constexpr char key[] = "foo";
constexpr char blob_value[] = "foo_blob_value";
ASSERT_OK(Put(key, blob_value));
ASSERT_OK(Flush());
SyncPoint::GetInstance()->SetCallBack(sync_point_, [this](void* /* arg */) {
fault_injection_env_->SetFilesystemActive(false,
Status::IOError(sync_point_));
});
SyncPoint::GetInstance()->EnableProcessing();
ASSERT_TRUE(db_->CompactRange(CompactRangeOptions(), /*begin=*/nullptr,
/*end=*/nullptr)
.IsIOError());
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
}
} // namespace ROCKSDB_NAMESPACE
#ifdef ROCKSDB_UNITTESTS_WITH_CUSTOM_OBJECTS_FROM_STATIC_LIBS
extern "C" {
void RegisterCustomObjects(int argc, char** argv);
}
#else
void RegisterCustomObjects(int /*argc*/, char** /*argv*/) {}
#endif // !ROCKSDB_UNITTESTS_WITH_CUSTOM_OBJECTS_FROM_STATIC_LIBS
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
RegisterCustomObjects(argc, argv);
return RUN_ALL_TESTS();
}
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