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6fb56c582c
rocksdb/utilities/blob_db/blob_db_test.cc
Yi Wu 6fb56c582c Blob DB: Add compaction filter to remove expired blob index entries 
Summary:
After adding expiration to blob index in #3066, we are now able to add a compaction filter to cleanup expired blob index entries.
Closes https://github.com/facebook/rocksdb/pull/3090

Differential Revision: D6183812

Pulled By: yiwu-arbug

fbshipit-source-id: 9cb03267a9702975290e758c9c176a2c03530b83
2017-11-02 23:42:39 -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).
#ifndef ROCKSDB_LITE
#include <algorithm>
#include <cstdlib>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "db/db_test_util.h"
#include "port/port.h"
#include "rocksdb/utilities/debug.h"
#include "util/cast_util.h"
#include "util/random.h"
#include "util/string_util.h"
#include "util/sync_point.h"
#include "util/testharness.h"
#include "utilities/blob_db/blob_db.h"
#include "utilities/blob_db/blob_db_impl.h"
#include "utilities/blob_db/blob_index.h"
namespace rocksdb {
namespace blob_db {
class BlobDBTest : public testing::Test {
public:
const int kMaxBlobSize = 1 << 14;
struct BlobRecord {
std::string key;
std::string value;
uint64_t expiration = 0;
};
BlobDBTest()
: dbname_(test::TmpDir() + "/blob_db_test"),
mock_env_(new MockTimeEnv(Env::Default())),
blob_db_(nullptr) {
Status s = DestroyBlobDB(dbname_, Options(), BlobDBOptions());
assert(s.ok());
}
~BlobDBTest() { Destroy(); }
Status TryOpen(BlobDBOptions bdb_options = BlobDBOptions(),
Options options = Options()) {
options.create_if_missing = true;
return BlobDB::Open(options, bdb_options, dbname_, &blob_db_);
}
void Open(BlobDBOptions bdb_options = BlobDBOptions(),
Options options = Options()) {
ASSERT_OK(TryOpen(bdb_options, options));
}
void Destroy() {
if (blob_db_) {
Options options = blob_db_->GetOptions();
BlobDBOptions bdb_options = blob_db_->GetBlobDBOptions();
delete blob_db_;
ASSERT_OK(DestroyBlobDB(dbname_, options, bdb_options));
blob_db_ = nullptr;
}
}
BlobDBImpl *blob_db_impl() {
return reinterpret_cast<BlobDBImpl *>(blob_db_);
}
Status Put(const Slice &key, const Slice &value) {
return blob_db_->Put(WriteOptions(), key, value);
}
void Delete(const std::string &key,
std::map<std::string, std::string> *data = nullptr) {
ASSERT_OK(blob_db_->Delete(WriteOptions(), key));
if (data != nullptr) {
data->erase(key);
}
}
Status PutUntil(const Slice &key, const Slice &value, uint64_t expiration) {
return blob_db_->PutUntil(WriteOptions(), key, value, expiration);
}
void PutRandomWithTTL(const std::string &key, uint64_t ttl, Random *rnd,
std::map<std::string, std::string> *data = nullptr) {
int len = rnd->Next() % kMaxBlobSize + 1;
std::string value = test::RandomHumanReadableString(rnd, len);
ASSERT_OK(
blob_db_->PutWithTTL(WriteOptions(), Slice(key), Slice(value), ttl));
if (data != nullptr) {
(*data)[key] = value;
}
}
void PutRandomUntil(const std::string &key, uint64_t expiration, Random *rnd,
std::map<std::string, std::string> *data = nullptr) {
int len = rnd->Next() % kMaxBlobSize + 1;
std::string value = test::RandomHumanReadableString(rnd, len);
ASSERT_OK(blob_db_->PutUntil(WriteOptions(), Slice(key), Slice(value),
expiration));
if (data != nullptr) {
(*data)[key] = value;
}
}
void PutRandom(const std::string &key, Random *rnd,
std::map<std::string, std::string> *data = nullptr) {
PutRandom(blob_db_, key, rnd, data);
}
void PutRandom(DB *db, const std::string &key, Random *rnd,
std::map<std::string, std::string> *data = nullptr) {
int len = rnd->Next() % kMaxBlobSize + 1;
std::string value = test::RandomHumanReadableString(rnd, len);
ASSERT_OK(db->Put(WriteOptions(), Slice(key), Slice(value)));
if (data != nullptr) {
(*data)[key] = value;
}
}
void PutRandomToWriteBatch(
const std::string &key, Random *rnd, WriteBatch *batch,
std::map<std::string, std::string> *data = nullptr) {
int len = rnd->Next() % kMaxBlobSize + 1;
std::string value = test::RandomHumanReadableString(rnd, len);
ASSERT_OK(batch->Put(key, value));
if (data != nullptr) {
(*data)[key] = value;
}
}
// Verify blob db contain expected data and nothing more.
void VerifyDB(const std::map<std::string, std::string> &data) {
VerifyDB(blob_db_, data);
}
void VerifyDB(DB *db, const std::map<std::string, std::string> &data) {
Iterator *iter = db->NewIterator(ReadOptions());
iter->SeekToFirst();
for (auto &p : data) {
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(p.first, iter->key().ToString());
ASSERT_EQ(p.second, iter->value().ToString());
iter->Next();
}
ASSERT_FALSE(iter->Valid());
ASSERT_OK(iter->status());
delete iter;
}
void VerifyBaseDB(
const std::map<std::string, KeyVersion> &expected_versions) {
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
DB *db = blob_db_->GetRootDB();
std::vector<KeyVersion> versions;
GetAllKeyVersions(db, "", "", &versions);
ASSERT_EQ(expected_versions.size(), versions.size());
size_t i = 0;
for (auto &key_version : expected_versions) {
const KeyVersion &expected_version = key_version.second;
ASSERT_EQ(expected_version.user_key, versions[i].user_key);
ASSERT_EQ(expected_version.sequence, versions[i].sequence);
ASSERT_EQ(expected_version.type, versions[i].type);
if (versions[i].type == kTypeValue) {
ASSERT_EQ(expected_version.value, versions[i].value);
} else {
ASSERT_EQ(kTypeBlobIndex, versions[i].type);
PinnableSlice value;
ASSERT_OK(bdb_impl->TEST_GetBlobValue(versions[i].user_key,
versions[i].value, &value));
ASSERT_EQ(expected_version.value, value.ToString());
}
i++;
}
}
void InsertBlobs() {
WriteOptions wo;
std::string value;
Random rnd(301);
for (size_t i = 0; i < 100000; i++) {
uint64_t ttl = rnd.Next() % 86400;
PutRandomWithTTL("key" + ToString(i % 500), ttl, &rnd, nullptr);
}
for (size_t i = 0; i < 10; i++) {
Delete("key" + ToString(i % 500));
}
}
const std::string dbname_;
std::unique_ptr<MockTimeEnv> mock_env_;
std::shared_ptr<TTLExtractor> ttl_extractor_;
BlobDB *blob_db_;
}; // class BlobDBTest
TEST_F(BlobDBTest, Put) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
VerifyDB(data);
}
TEST_F(BlobDBTest, PutWithTTL) {
Random rnd(301);
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
std::map<std::string, std::string> data;
mock_env_->set_current_time(50);
for (size_t i = 0; i < 100; i++) {
uint64_t ttl = rnd.Next() % 100;
PutRandomWithTTL("key" + ToString(i), ttl, &rnd,
(ttl <= 50 ? nullptr : &data));
}
mock_env_->set_current_time(100);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(100 - data.size(), gc_stats.num_deletes);
ASSERT_EQ(data.size(), gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, PutUntil) {
Random rnd(301);
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
std::map<std::string, std::string> data;
mock_env_->set_current_time(50);
for (size_t i = 0; i < 100; i++) {
uint64_t expiration = rnd.Next() % 100 + 50;
PutRandomUntil("key" + ToString(i), expiration, &rnd,
(expiration <= 100 ? nullptr : &data));
}
mock_env_->set_current_time(100);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(100 - data.size(), gc_stats.num_deletes);
ASSERT_EQ(data.size(), gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, TTLExtrator_NoTTL) {
// The default ttl extractor return no ttl for every key.
ttl_extractor_.reset(new TTLExtractor());
Random rnd(301);
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.ttl_extractor = ttl_extractor_;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
std::map<std::string, std::string> data;
mock_env_->set_current_time(0);
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
// very far in the future..
mock_env_->set_current_time(std::numeric_limits<uint64_t>::max() / 1000000 -
10);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_FALSE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(0, gc_stats.num_deletes);
ASSERT_EQ(100, gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, TTLExtractor_ExtractTTL) {
Random rnd(301);
class TestTTLExtractor : public TTLExtractor {
public:
explicit TestTTLExtractor(Random *r) : rnd(r) {}
virtual bool ExtractTTL(const Slice &key, const Slice &value, uint64_t *ttl,
std::string * /*new_value*/,
bool * /*value_changed*/) override {
*ttl = rnd->Next() % 100;
if (*ttl > 50) {
data[key.ToString()] = value.ToString();
}
return true;
}
Random *rnd;
std::map<std::string, std::string> data;
};
ttl_extractor_.reset(new TestTTLExtractor(&rnd));
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.ttl_extractor = ttl_extractor_;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
mock_env_->set_current_time(50);
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd);
}
mock_env_->set_current_time(100);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
auto &data = static_cast<TestTTLExtractor *>(ttl_extractor_.get())->data;
ASSERT_EQ(100 - data.size(), gc_stats.num_deletes);
ASSERT_EQ(data.size(), gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, TTLExtractor_ExtractExpiration) {
Random rnd(301);
class TestTTLExtractor : public TTLExtractor {
public:
explicit TestTTLExtractor(Random *r) : rnd(r) {}
virtual bool ExtractExpiration(const Slice &key, const Slice &value,
uint64_t /*now*/, uint64_t *expiration,
std::string * /*new_value*/,
bool * /*value_changed*/) override {
*expiration = rnd->Next() % 100 + 50;
if (*expiration > 100) {
data[key.ToString()] = value.ToString();
}
return true;
}
Random *rnd;
std::map<std::string, std::string> data;
};
ttl_extractor_.reset(new TestTTLExtractor(&rnd));
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.ttl_extractor = ttl_extractor_;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
mock_env_->set_current_time(50);
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd);
}
mock_env_->set_current_time(100);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
auto &data = static_cast<TestTTLExtractor *>(ttl_extractor_.get())->data;
ASSERT_EQ(100 - data.size(), gc_stats.num_deletes);
ASSERT_EQ(data.size(), gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, TTLExtractor_ChangeValue) {
class TestTTLExtractor : public TTLExtractor {
public:
const Slice kTTLSuffix = Slice("ttl:");
bool ExtractTTL(const Slice & /*key*/, const Slice &value, uint64_t *ttl,
std::string *new_value, bool *value_changed) override {
if (value.size() < 12) {
return false;
}
const char *p = value.data() + value.size() - 12;
if (kTTLSuffix != Slice(p, 4)) {
return false;
}
*ttl = DecodeFixed64(p + 4);
*new_value = Slice(value.data(), value.size() - 12).ToString();
*value_changed = true;
return true;
}
};
Random rnd(301);
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = 1000;
bdb_options.min_blob_size = 0;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.ttl_extractor = std::make_shared<TestTTLExtractor>();
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
std::map<std::string, std::string> data;
mock_env_->set_current_time(50);
for (size_t i = 0; i < 100; i++) {
int len = rnd.Next() % kMaxBlobSize + 1;
std::string key = "key" + ToString(i);
std::string value = test::RandomHumanReadableString(&rnd, len);
uint64_t ttl = rnd.Next() % 100;
std::string value_ttl = value + "ttl:";
PutFixed64(&value_ttl, ttl);
ASSERT_OK(blob_db_->Put(WriteOptions(), Slice(key), Slice(value_ttl)));
if (ttl > 50) {
data[key] = value;
}
}
mock_env_->set_current_time(100);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_OK(bdb_impl->TEST_CloseBlobFile(blob_files[0]));
GCStats gc_stats;
ASSERT_OK(bdb_impl->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(100 - data.size(), gc_stats.num_deletes);
ASSERT_EQ(data.size(), gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, StackableDBGet) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
for (size_t i = 0; i < 100; i++) {
StackableDB *db = blob_db_;
ColumnFamilyHandle *column_family = db->DefaultColumnFamily();
std::string key = "key" + ToString(i);
PinnableSlice pinnable_value;
ASSERT_OK(db->Get(ReadOptions(), column_family, key, &pinnable_value));
std::string string_value;
ASSERT_OK(db->Get(ReadOptions(), column_family, key, &string_value));
ASSERT_EQ(string_value, pinnable_value.ToString());
ASSERT_EQ(string_value, data[key]);
}
}
TEST_F(BlobDBTest, WriteBatch) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
WriteBatch batch;
for (size_t j = 0; j < 10; j++) {
PutRandomToWriteBatch("key" + ToString(j * 100 + i), &rnd, &batch, &data);
}
blob_db_->Write(WriteOptions(), &batch);
}
VerifyDB(data);
}
TEST_F(BlobDBTest, Delete) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
for (size_t i = 0; i < 100; i += 5) {
Delete("key" + ToString(i), &data);
}
VerifyDB(data);
}
TEST_F(BlobDBTest, DeleteBatch) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd);
}
WriteBatch batch;
for (size_t i = 0; i < 100; i++) {
batch.Delete("key" + ToString(i));
}
ASSERT_OK(blob_db_->Write(WriteOptions(), &batch));
// DB should be empty.
VerifyDB({});
}
TEST_F(BlobDBTest, Override) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (int i = 0; i < 10000; i++) {
PutRandom("key" + ToString(i), &rnd, nullptr);
}
// override all the keys
for (int i = 0; i < 10000; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
VerifyDB(data);
}
#ifdef SNAPPY
TEST_F(BlobDBTest, Compression) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
bdb_options.compression = CompressionType::kSnappyCompression;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
PutRandom("put-key" + ToString(i), &rnd, &data);
}
for (int i = 0; i < 100; i++) {
WriteBatch batch;
for (size_t j = 0; j < 10; j++) {
PutRandomToWriteBatch("write-batch-key" + ToString(j * 100 + i), &rnd,
&batch, &data);
}
blob_db_->Write(WriteOptions(), &batch);
}
VerifyDB(data);
}
#endif
TEST_F(BlobDBTest, MultipleWriters) {
Open(BlobDBOptions());
std::vector<port::Thread> workers;
std::vector<std::map<std::string, std::string>> data_set(10);
for (uint32_t i = 0; i < 10; i++)
workers.push_back(port::Thread(
[&](uint32_t id) {
Random rnd(301 + id);
for (int j = 0; j < 100; j++) {
std::string key = "key" + ToString(id) + "_" + ToString(j);
if (id < 5) {
PutRandom(key, &rnd, &data_set[id]);
} else {
WriteBatch batch;
PutRandomToWriteBatch(key, &rnd, &batch, &data_set[id]);
blob_db_->Write(WriteOptions(), &batch);
}
}
},
i));
std::map<std::string, std::string> data;
for (size_t i = 0; i < 10; i++) {
workers[i].join();
data.insert(data_set[i].begin(), data_set[i].end());
}
VerifyDB(data);
}
TEST_F(BlobDBTest, GCAfterOverwriteKeys) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
DBImpl *db_impl = static_cast_with_check<DBImpl, DB>(blob_db_->GetBaseDB());
std::map<std::string, std::string> data;
for (int i = 0; i < 200; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(blob_files[0]));
// Test for data in SST
size_t new_keys = 0;
for (int i = 0; i < 100; i++) {
if (rnd.Next() % 2 == 1) {
new_keys++;
PutRandom("key" + ToString(i), &rnd, &data);
}
}
db_impl->TEST_FlushMemTable(true /*wait*/);
// Test for data in memtable
for (int i = 100; i < 200; i++) {
if (rnd.Next() % 2 == 1) {
new_keys++;
PutRandom("key" + ToString(i), &rnd, &data);
}
}
GCStats gc_stats;
ASSERT_OK(blob_db_impl()->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(200, gc_stats.blob_count);
ASSERT_EQ(0, gc_stats.num_deletes);
ASSERT_EQ(200 - new_keys, gc_stats.num_relocate);
VerifyDB(data);
}
TEST_F(BlobDBTest, GCRelocateKeyWhileOverwriting) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
ASSERT_OK(blob_db_->Put(WriteOptions(), "foo", "v1"));
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(blob_files[0]));
SyncPoint::GetInstance()->LoadDependency(
{{"BlobDBImpl::GCFileAndUpdateLSM:AfterGetFromBaseDB",
"BlobDBImpl::PutUntil:Start"},
{"BlobDBImpl::PutUntil:Finish",
"BlobDBImpl::GCFileAndUpdateLSM:BeforeRelocate"}});
SyncPoint::GetInstance()->EnableProcessing();
auto writer = port::Thread(
[this]() { ASSERT_OK(blob_db_->Put(WriteOptions(), "foo", "v2")); });
GCStats gc_stats;
ASSERT_OK(blob_db_impl()->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(1, gc_stats.blob_count);
ASSERT_EQ(0, gc_stats.num_deletes);
ASSERT_EQ(1, gc_stats.num_relocate);
ASSERT_EQ(0, gc_stats.relocate_succeeded);
ASSERT_EQ(1, gc_stats.overwritten_while_relocate);
writer.join();
VerifyDB({{"foo", "v2"}});
}
TEST_F(BlobDBTest, GCExpiredKeyWhileOverwriting) {
Random rnd(301);
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options, options);
mock_env_->set_current_time(100);
ASSERT_OK(blob_db_->PutUntil(WriteOptions(), "foo", "v1", 200));
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(blob_files[0]));
mock_env_->set_current_time(300);
SyncPoint::GetInstance()->LoadDependency(
{{"BlobDBImpl::GCFileAndUpdateLSM:AfterGetFromBaseDB",
"BlobDBImpl::PutUntil:Start"},
{"BlobDBImpl::PutUntil:Finish",
"BlobDBImpl::GCFileAndUpdateLSM:BeforeDelete"}});
SyncPoint::GetInstance()->EnableProcessing();
auto writer = port::Thread([this]() {
ASSERT_OK(blob_db_->PutUntil(WriteOptions(), "foo", "v2", 400));
});
GCStats gc_stats;
ASSERT_OK(blob_db_impl()->TEST_GCFileAndUpdateLSM(blob_files[0], &gc_stats));
ASSERT_EQ(1, gc_stats.blob_count);
ASSERT_EQ(1, gc_stats.num_deletes);
ASSERT_EQ(0, gc_stats.delete_succeeded);
ASSERT_EQ(1, gc_stats.overwritten_while_delete);
ASSERT_EQ(0, gc_stats.num_relocate);
writer.join();
VerifyDB({{"foo", "v2"}});
}
// This test is no longer valid since we now return an error when we go
// over the configured blob_dir_size.
// The test needs to be re-written later in such a way that writes continue
// after a GC happens.
TEST_F(BlobDBTest, DISABLED_GCOldestSimpleBlobFileWhenOutOfSpace) {
// Use mock env to stop wall clock.
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.blob_dir_size = 100;
bdb_options.blob_file_size = 100;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::string value(100, 'v');
ASSERT_OK(blob_db_->PutWithTTL(WriteOptions(), "key_with_ttl", value, 60));
for (int i = 0; i < 10; i++) {
ASSERT_OK(blob_db_->Put(WriteOptions(), "key" + ToString(i), value));
}
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(11, blob_files.size());
ASSERT_TRUE(blob_files[0]->HasTTL());
ASSERT_TRUE(blob_files[0]->Immutable());
for (int i = 1; i <= 10; i++) {
ASSERT_FALSE(blob_files[i]->HasTTL());
if (i < 10) {
ASSERT_TRUE(blob_files[i]->Immutable());
}
}
blob_db_impl()->TEST_RunGC();
// The oldest simple blob file (i.e. blob_files[1]) has been selected for GC.
auto obsolete_files = blob_db_impl()->TEST_GetObsoleteFiles();
ASSERT_EQ(1, obsolete_files.size());
ASSERT_EQ(blob_files[1]->BlobFileNumber(),
obsolete_files[0]->BlobFileNumber());
}
TEST_F(BlobDBTest, ReadWhileGC) {
// run the same test for Get(), MultiGet() and Iterator each.
for (int i = 0; i < 2; i++) {
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
blob_db_->Put(WriteOptions(), "foo", "bar");
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
std::shared_ptr<BlobFile> bfile = blob_files[0];
uint64_t bfile_number = bfile->BlobFileNumber();
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(bfile));
switch (i) {
case 0:
SyncPoint::GetInstance()->LoadDependency(
{{"BlobDBImpl::Get:AfterIndexEntryGet:1",
"BlobDBTest::ReadWhileGC:1"},
{"BlobDBTest::ReadWhileGC:2",
"BlobDBImpl::Get:AfterIndexEntryGet:2"}});
break;
case 1:
SyncPoint::GetInstance()->LoadDependency(
{{"BlobDBIterator::UpdateBlobValue:Start:1",
"BlobDBTest::ReadWhileGC:1"},
{"BlobDBTest::ReadWhileGC:2",
"BlobDBIterator::UpdateBlobValue:Start:2"}});
break;
}
SyncPoint::GetInstance()->EnableProcessing();
auto reader = port::Thread([this, i]() {
std::string value;
std::vector<std::string> values;
std::vector<Status> statuses;
switch (i) {
case 0:
ASSERT_OK(blob_db_->Get(ReadOptions(), "foo", &value));
ASSERT_EQ("bar", value);
break;
case 1:
// VerifyDB use iterator to scan the DB.
VerifyDB({{"foo", "bar"}});
break;
}
});
TEST_SYNC_POINT("BlobDBTest::ReadWhileGC:1");
GCStats gc_stats;
ASSERT_OK(blob_db_impl()->TEST_GCFileAndUpdateLSM(bfile, &gc_stats));
ASSERT_EQ(1, gc_stats.blob_count);
ASSERT_EQ(1, gc_stats.num_relocate);
ASSERT_EQ(1, gc_stats.relocate_succeeded);
blob_db_impl()->TEST_DeleteObsoleteFiles();
// The file shouln't be deleted
blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(2, blob_files.size());
ASSERT_EQ(bfile_number, blob_files[0]->BlobFileNumber());
auto obsolete_files = blob_db_impl()->TEST_GetObsoleteFiles();
ASSERT_EQ(1, obsolete_files.size());
ASSERT_EQ(bfile_number, obsolete_files[0]->BlobFileNumber());
TEST_SYNC_POINT("BlobDBTest::ReadWhileGC:2");
reader.join();
SyncPoint::GetInstance()->DisableProcessing();
// The file is deleted this time
blob_db_impl()->TEST_DeleteObsoleteFiles();
blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_NE(bfile_number, blob_files[0]->BlobFileNumber());
ASSERT_EQ(0, blob_db_impl()->TEST_GetObsoleteFiles().size());
VerifyDB({{"foo", "bar"}});
Destroy();
}
}
TEST_F(BlobDBTest, SnapshotAndGarbageCollection) {
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
// i = when to take snapshot
for (int i = 0; i < 4; i++) {
for (bool delete_key : {true, false}) {
const Snapshot *snapshot = nullptr;
Destroy();
Open(bdb_options);
// First file
ASSERT_OK(Put("key1", "value"));
if (i == 0) {
snapshot = blob_db_->GetSnapshot();
}
auto blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(blob_files[0]));
// Second file
ASSERT_OK(Put("key2", "value"));
if (i == 1) {
snapshot = blob_db_->GetSnapshot();
}
blob_files = blob_db_impl()->TEST_GetBlobFiles();
ASSERT_EQ(2, blob_files.size());
auto bfile = blob_files[1];
ASSERT_FALSE(bfile->Immutable());
ASSERT_OK(blob_db_impl()->TEST_CloseBlobFile(bfile));
// Third file
ASSERT_OK(Put("key3", "value"));
if (i == 2) {
snapshot = blob_db_->GetSnapshot();
}
if (delete_key) {
Delete("key2");
}
GCStats gc_stats;
ASSERT_OK(blob_db_impl()->TEST_GCFileAndUpdateLSM(bfile, &gc_stats));
ASSERT_TRUE(bfile->Obsolete());
ASSERT_EQ(1, gc_stats.blob_count);
if (delete_key) {
ASSERT_EQ(0, gc_stats.num_relocate);
ASSERT_EQ(bfile->GetSequenceRange().second + 1,
bfile->GetObsoleteSequence());
} else {
ASSERT_EQ(1, gc_stats.num_relocate);
ASSERT_EQ(blob_db_->GetLatestSequenceNumber(),
bfile->GetObsoleteSequence());
}
if (i == 3) {
snapshot = blob_db_->GetSnapshot();
}
size_t num_files = delete_key ? 3 : 4;
ASSERT_EQ(num_files, blob_db_impl()->TEST_GetBlobFiles().size());
blob_db_impl()->TEST_DeleteObsoleteFiles();
if (i == 0 || i == 3 || (i == 2 && delete_key)) {
// The snapshot shouldn't see data in bfile
ASSERT_EQ(num_files - 1, blob_db_impl()->TEST_GetBlobFiles().size());
} else {
// The snapshot will see data in bfile, so the file shouldn't be deleted
ASSERT_EQ(num_files, blob_db_impl()->TEST_GetBlobFiles().size());
blob_db_->ReleaseSnapshot(snapshot);
blob_db_impl()->TEST_DeleteObsoleteFiles();
ASSERT_EQ(num_files - 1, blob_db_impl()->TEST_GetBlobFiles().size());
}
}
}
}
TEST_F(BlobDBTest, ColumnFamilyNotSupported) {
Options options;
options.env = mock_env_.get();
mock_env_->set_current_time(0);
Open(BlobDBOptions(), options);
ColumnFamilyHandle *default_handle = blob_db_->DefaultColumnFamily();
ColumnFamilyHandle *handle = nullptr;
std::string value;
std::vector<std::string> values;
// The call simply pass through to base db. It should succeed.
ASSERT_OK(
blob_db_->CreateColumnFamily(ColumnFamilyOptions(), "foo", &handle));
ASSERT_TRUE(blob_db_->Put(WriteOptions(), handle, "k", "v").IsNotSupported());
ASSERT_TRUE(blob_db_->PutWithTTL(WriteOptions(), handle, "k", "v", 60)
.IsNotSupported());
ASSERT_TRUE(blob_db_->PutUntil(WriteOptions(), handle, "k", "v", 100)
.IsNotSupported());
WriteBatch batch;
batch.Put("k1", "v1");
batch.Put(handle, "k2", "v2");
ASSERT_TRUE(blob_db_->Write(WriteOptions(), &batch).IsNotSupported());
ASSERT_TRUE(blob_db_->Get(ReadOptions(), "k1", &value).IsNotFound());
ASSERT_TRUE(
blob_db_->Get(ReadOptions(), handle, "k", &value).IsNotSupported());
auto statuses = blob_db_->MultiGet(ReadOptions(), {default_handle, handle},
{"k1", "k2"}, &values);
ASSERT_EQ(2, statuses.size());
ASSERT_TRUE(statuses[0].IsNotSupported());
ASSERT_TRUE(statuses[1].IsNotSupported());
ASSERT_EQ(nullptr, blob_db_->NewIterator(ReadOptions(), handle));
delete handle;
}
TEST_F(BlobDBTest, GetLiveFilesMetaData) {
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = 0;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
std::map<std::string, std::string> data;
for (size_t i = 0; i < 100; i++) {
PutRandom("key" + ToString(i), &rnd, &data);
}
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
std::vector<LiveFileMetaData> metadata;
bdb_impl->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(1U, metadata.size());
std::string filename = dbname_ + "/blob_dir/000001.blob";
ASSERT_EQ(filename, metadata[0].name);
ASSERT_EQ("default", metadata[0].column_family_name);
std::vector<std::string> livefile;
uint64_t mfs;
bdb_impl->GetLiveFiles(livefile, &mfs, false);
ASSERT_EQ(4U, livefile.size());
ASSERT_EQ(filename, livefile[3]);
VerifyDB(data);
}
TEST_F(BlobDBTest, MigrateFromPlainRocksDB) {
constexpr size_t kNumKey = 20;
constexpr size_t kNumIteration = 10;
Random rnd(301);
std::map<std::string, std::string> data;
std::vector<bool> is_blob(kNumKey, false);
// Write to plain rocksdb.
Options options;
options.create_if_missing = true;
DB *db = nullptr;
ASSERT_OK(DB::Open(options, dbname_, &db));
for (size_t i = 0; i < kNumIteration; i++) {
auto key_index = rnd.Next() % kNumKey;
std::string key = "key" + ToString(key_index);
PutRandom(db, key, &rnd, &data);
}
VerifyDB(db, data);
delete db;
db = nullptr;
// Open as blob db. Verify it can read existing data.
Open();
VerifyDB(blob_db_, data);
for (size_t i = 0; i < kNumIteration; i++) {
auto key_index = rnd.Next() % kNumKey;
std::string key = "key" + ToString(key_index);
is_blob[key_index] = true;
PutRandom(blob_db_, key, &rnd, &data);
}
VerifyDB(blob_db_, data);
delete blob_db_;
blob_db_ = nullptr;
// Verify plain db return error for keys written by blob db.
ASSERT_OK(DB::Open(options, dbname_, &db));
std::string value;
for (size_t i = 0; i < kNumKey; i++) {
std::string key = "key" + ToString(i);
Status s = db->Get(ReadOptions(), key, &value);
if (data.count(key) == 0) {
ASSERT_TRUE(s.IsNotFound());
} else if (is_blob[i]) {
ASSERT_TRUE(s.IsNotSupported());
} else {
ASSERT_OK(s);
ASSERT_EQ(data[key], value);
}
}
delete db;
}
// Test to verify that a NoSpace IOError Status is returned on reaching
// blob_dir_size limit.
TEST_F(BlobDBTest, OutOfSpace) {
// Use mock env to stop wall clock.
Options options;
options.env = mock_env_.get();
BlobDBOptions bdb_options;
bdb_options.blob_dir_size = 150;
bdb_options.disable_background_tasks = true;
Open(bdb_options);
// Each stored blob has an overhead of about 42 bytes currently.
// So a small key + a 100 byte blob should take up ~150 bytes in the db.
std::string value(100, 'v');
ASSERT_OK(blob_db_->PutWithTTL(WriteOptions(), "key1", value, 60));
// Putting another blob should fail as ading it would exceed the blob_dir_size
// limit.
Status s = blob_db_->PutWithTTL(WriteOptions(), "key2", value, 60);
ASSERT_TRUE(s.IsIOError());
ASSERT_TRUE(s.IsNoSpace());
}
TEST_F(BlobDBTest, EvictOldestFileWhenCloseToSpaceLimit) {
// Use mock env to stop wall clock.
Options options;
BlobDBOptions bdb_options;
bdb_options.blob_dir_size = 270;
bdb_options.blob_file_size = 100;
bdb_options.disable_background_tasks = true;
bdb_options.is_fifo = true;
Open(bdb_options);
// Each stored blob has an overhead of 32 bytes currently.
// So a 100 byte blob should take up 132 bytes.
std::string value(100, 'v');
ASSERT_OK(blob_db_->PutWithTTL(WriteOptions(), "key1", value, 10));
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(1, blob_files.size());
// Adding another 100 byte blob would take the total size to 264 bytes
// (2*132), which is more than 90% of blob_dir_size. So, the oldest file
// should be evicted and put in obsolete files list.
ASSERT_OK(blob_db_->PutWithTTL(WriteOptions(), "key2", value, 60));
auto obsolete_files = bdb_impl->TEST_GetObsoleteFiles();
ASSERT_EQ(1, obsolete_files.size());
ASSERT_TRUE(obsolete_files[0]->Immutable());
ASSERT_EQ(blob_files[0]->BlobFileNumber(),
obsolete_files[0]->BlobFileNumber());
bdb_impl->TEST_DeleteObsoleteFiles();
obsolete_files = bdb_impl->TEST_GetObsoleteFiles();
ASSERT_TRUE(obsolete_files.empty());
}
TEST_F(BlobDBTest, InlineSmallValues) {
constexpr uint64_t kMaxExpiration = 1000;
Random rnd(301);
BlobDBOptions bdb_options;
bdb_options.ttl_range_secs = kMaxExpiration;
bdb_options.min_blob_size = 100;
bdb_options.blob_file_size = 256 * 1000 * 1000;
bdb_options.disable_background_tasks = true;
Options options;
options.env = mock_env_.get();
mock_env_->set_current_time(0);
Open(bdb_options, options);
std::map<std::string, std::string> data;
std::map<std::string, KeyVersion> versions;
SequenceNumber first_non_ttl_seq = kMaxSequenceNumber;
SequenceNumber first_ttl_seq = kMaxSequenceNumber;
SequenceNumber last_non_ttl_seq = 0;
SequenceNumber last_ttl_seq = 0;
for (size_t i = 0; i < 1000; i++) {
bool is_small_value = rnd.Next() % 2;
bool has_ttl = rnd.Next() % 2;
uint64_t expiration = rnd.Next() % kMaxExpiration;
int len = is_small_value ? 50 : 200;
std::string key = "key" + ToString(i);
std::string value = test::RandomHumanReadableString(&rnd, len);
std::string blob_index;
data[key] = value;
SequenceNumber sequence = blob_db_->GetLatestSequenceNumber() + 1;
if (!has_ttl) {
ASSERT_OK(blob_db_->Put(WriteOptions(), key, value));
} else {
ASSERT_OK(blob_db_->PutUntil(WriteOptions(), key, value, expiration));
}
ASSERT_EQ(blob_db_->GetLatestSequenceNumber(), sequence);
versions[key] =
KeyVersion(key, value, sequence,
(is_small_value && !has_ttl) ? kTypeValue : kTypeBlobIndex);
if (!is_small_value) {
if (!has_ttl) {
first_non_ttl_seq = std::min(first_non_ttl_seq, sequence);
last_non_ttl_seq = std::max(last_non_ttl_seq, sequence);
} else {
first_ttl_seq = std::min(first_ttl_seq, sequence);
last_ttl_seq = std::max(last_ttl_seq, sequence);
}
}
}
VerifyDB(data);
VerifyBaseDB(versions);
auto *bdb_impl = static_cast<BlobDBImpl *>(blob_db_);
auto blob_files = bdb_impl->TEST_GetBlobFiles();
ASSERT_EQ(2, blob_files.size());
std::shared_ptr<BlobFile> non_ttl_file;
std::shared_ptr<BlobFile> ttl_file;
if (blob_files[0]->HasTTL()) {
ttl_file = blob_files[0];
non_ttl_file = blob_files[1];
} else {
non_ttl_file = blob_files[0];
ttl_file = blob_files[1];
}
ASSERT_FALSE(non_ttl_file->HasTTL());
ASSERT_EQ(first_non_ttl_seq, non_ttl_file->GetSequenceRange().first);
ASSERT_EQ(last_non_ttl_seq, non_ttl_file->GetSequenceRange().second);
ASSERT_TRUE(ttl_file->HasTTL());
ASSERT_EQ(first_ttl_seq, ttl_file->GetSequenceRange().first);
ASSERT_EQ(last_ttl_seq, ttl_file->GetSequenceRange().second);
}
TEST_F(BlobDBTest, CompactionFilterNotSupported) {
class TestCompactionFilter : public CompactionFilter {
virtual const char *Name() const { return "TestCompactionFilter"; }
};
class TestCompactionFilterFactory : public CompactionFilterFactory {
virtual const char *Name() const { return "TestCompactionFilterFactory"; }
virtual std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context & /*context*/) {
return std::unique_ptr<CompactionFilter>(new TestCompactionFilter());
}
};
for (int i = 0; i < 2; i++) {
Options options;
if (i == 0) {
options.compaction_filter = new TestCompactionFilter();
} else {
options.compaction_filter_factory.reset(
new TestCompactionFilterFactory());
}
ASSERT_TRUE(TryOpen(BlobDBOptions(), options).IsNotSupported());
delete options.compaction_filter;
}
}
TEST_F(BlobDBTest, FilterExpiredBlobIndex) {
constexpr size_t kNumKeys = 100;
constexpr size_t kNumPuts = 1000;
constexpr uint64_t kMaxExpiration = 1000;
constexpr uint64_t kCompactTime = 500;
constexpr uint64_t kMinBlobSize = 100;
Random rnd(301);
mock_env_->set_current_time(0);
BlobDBOptions bdb_options;
bdb_options.min_blob_size = kMinBlobSize;
bdb_options.disable_background_tasks = true;
Options options;
options.env = mock_env_.get();
Open(bdb_options, options);
std::map<std::string, std::string> data;
std::map<std::string, std::string> data_after_compact;
for (size_t i = 0; i < kNumPuts; i++) {
bool is_small_value = rnd.Next() % 2;
bool has_ttl = rnd.Next() % 2;
uint64_t expiration = rnd.Next() % kMaxExpiration;
int len = is_small_value ? 10 : 200;
std::string key = "key" + ToString(rnd.Next() % kNumKeys);
std::string value = test::RandomHumanReadableString(&rnd, len);
if (!has_ttl) {
if (is_small_value) {
std::string blob_entry;
BlobIndex::EncodeInlinedTTL(&blob_entry, expiration, value);
// Fake blob index with TTL. See what it will do.
ASSERT_GT(kMinBlobSize, blob_entry.size());
value = blob_entry;
}
ASSERT_OK(Put(key, value));
data_after_compact[key] = value;
} else {
ASSERT_OK(PutUntil(key, value, expiration));
if (expiration <= kCompactTime) {
data_after_compact.erase(key);
} else {
data_after_compact[key] = value;
}
}
data[key] = value;
}
VerifyDB(data);
mock_env_->set_current_time(kCompactTime);
// Take a snapshot before compaction. Make sure expired blob indexes is
// filtered regardless of snapshot.
const Snapshot *snapshot = blob_db_->GetSnapshot();
// Issue manual compaction to trigger compaction filter.
ASSERT_OK(blob_db_->CompactRange(CompactRangeOptions(),
blob_db_->DefaultColumnFamily(), nullptr,
nullptr));
blob_db_->ReleaseSnapshot(snapshot);
// Verify expired blob index are filtered.
std::vector<KeyVersion> versions;
GetAllKeyVersions(blob_db_, "", "", &versions);
ASSERT_EQ(data_after_compact.size(), versions.size());
for (auto &version : versions) {
ASSERT_TRUE(data_after_compact.count(version.user_key) > 0);
}
VerifyDB(data_after_compact);
}
} // namespace blob_db
} // namespace rocksdb
// A black-box test for the ttl wrapper around rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <stdio.h>
int main(int argc, char** argv) {
fprintf(stderr, "SKIPPED as BlobDB is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // !ROCKSDB_LITE
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