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rocksdb/db/blob/db_blob_index_test.cc

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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).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <functional>
#include <string>
#include <utility>
#include <vector>
#include "db/arena_wrapped_db_iter.h"
#include "db/blob/blob_index.h"
#include "db/column_family.h"
#include "db/db_iter.h"
#include "db/db_test_util.h"
#include "db/dbformat.h"
#include "db/write_batch_internal.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "util/string_util.h"
#include "utilities/merge_operators.h"
namespace ROCKSDB_NAMESPACE {
// kTypeBlobIndex is a value type used by BlobDB only. The base rocksdb
// should accept the value type on write, and report not supported value
// for reads, unless caller request for it explicitly. The base rocksdb
// doesn't understand format of actual blob index (the value).
class DBBlobIndexTest : public DBTestBase {
public:
enum Tier {
kMemtable = 0,
kImmutableMemtables = 1,
kL0SstFile = 2,
kLnSstFile = 3,
};
const std::vector<Tier> kAllTiers = {Tier::kMemtable,
Tier::kImmutableMemtables,
Tier::kL0SstFile, Tier::kLnSstFile};
DBBlobIndexTest() : DBTestBase("db_blob_index_test", /*env_do_fsync=*/true) {}
ColumnFamilyHandle* cfh() { return dbfull()->DefaultColumnFamily(); }
ColumnFamilyData* cfd() {
return static_cast_with_check<ColumnFamilyHandleImpl>(cfh())->cfd();
}
Status PutBlobIndex(WriteBatch* batch, const Slice& key,
const Slice& blob_index) {
return WriteBatchInternal::PutBlobIndex(batch, cfd()->GetID(), key,
blob_index);
}
Status Write(WriteBatch* batch) {
return dbfull()->Write(WriteOptions(), batch);
}
std::string GetImpl(const Slice& key, bool* is_blob_index = nullptr,
const Snapshot* snapshot = nullptr) {
ReadOptions read_options;
read_options.snapshot = snapshot;
PinnableSlice value;
DBImpl::GetImplOptions get_impl_options;
get_impl_options.column_family = cfh();
get_impl_options.value = &value;
get_impl_options.is_blob_index = is_blob_index;
auto s = dbfull()->GetImpl(read_options, key, get_impl_options);
if (s.IsNotFound()) {
return "NOT_FOUND";
}
if (s.IsCorruption()) {
return "CORRUPTION";
}
if (s.IsNotSupported()) {
return "NOT_SUPPORTED";
}
if (!s.ok()) {
return s.ToString();
}
return value.ToString();
}
std::string GetBlobIndex(const Slice& key,
const Snapshot* snapshot = nullptr) {
bool is_blob_index = false;
std::string value = GetImpl(key, &is_blob_index, snapshot);
if (!is_blob_index) {
return "NOT_BLOB";
}
return value;
}
ArenaWrappedDBIter* GetBlobIterator() {
return dbfull()->NewIteratorImpl(
ReadOptions(), cfd(), dbfull()->GetLatestSequenceNumber(),
nullptr /*read_callback*/, true /*expose_blob_index*/);
}
Options GetTestOptions() {
Options options;
options.env = CurrentOptions().env;
options.create_if_missing = true;
options.num_levels = 2;
options.disable_auto_compactions = true;
// Disable auto flushes.
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 10;
options.merge_operator = MergeOperators::CreateStringAppendOperator();
return options;
}
void MoveDataTo(Tier tier) {
switch (tier) {
case Tier::kMemtable:
break;
case Tier::kImmutableMemtables:
ASSERT_OK(dbfull()->TEST_SwitchMemtable());
break;
case Tier::kL0SstFile:
ASSERT_OK(Flush());
break;
case Tier::kLnSstFile:
ASSERT_OK(Flush());
ASSERT_OK(Put("a", "dummy"));
ASSERT_OK(Put("z", "dummy"));
ASSERT_OK(Flush());
ASSERT_OK(
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel());
break;
}
}
};
// Note: the following test case pertains to the StackableDB-based BlobDB
// implementation. We should be able to write kTypeBlobIndex to memtables and
// SST files.
TEST_F(DBBlobIndexTest, Write) {
for (auto tier : kAllTiers) {
DestroyAndReopen(GetTestOptions());
std::vector<std::pair<std::string, std::string>> key_values;
constexpr size_t num_key_values = 5;
key_values.reserve(num_key_values);
for (size_t i = 1; i <= num_key_values; ++i) {
std::string key = "key" + std::to_string(i);
std::string blob_index;
BlobIndex::EncodeInlinedTTL(&blob_index, /* expiration */ 9876543210,
"blob" + std::to_string(i));
key_values.emplace_back(std::move(key), std::move(blob_index));
}
for (const auto& key_value : key_values) {
WriteBatch batch;
ASSERT_OK(PutBlobIndex(&batch, key_value.first, key_value.second));
ASSERT_OK(Write(&batch));
}
MoveDataTo(tier);
for (const auto& key_value : key_values) {
ASSERT_EQ(GetBlobIndex(key_value.first), key_value.second);
}
}
}
// Note: the following test case pertains to the StackableDB-based BlobDB
// implementation. Get should be able to return blob index if is_blob_index is
// provided, otherwise it should return Status::NotSupported (when reading from
// memtable) or Status::Corruption (when reading from SST). Reading from SST
// returns Corruption because we can't differentiate between the application
// accidentally opening the base DB of a stacked BlobDB and actual corruption
// when using the integrated BlobDB.
TEST_F(DBBlobIndexTest, Get) {
std::string blob_index;
BlobIndex::EncodeInlinedTTL(&blob_index, /* expiration */ 9876543210, "blob");
for (auto tier : kAllTiers) {
DestroyAndReopen(GetTestOptions());
WriteBatch batch;
ASSERT_OK(batch.Put("key", "value"));
ASSERT_OK(PutBlobIndex(&batch, "blob_key", blob_index));
ASSERT_OK(Write(&batch));
MoveDataTo(tier);
// Verify normal value
bool is_blob_index = false;
PinnableSlice value;
ASSERT_EQ("value", Get("key"));
ASSERT_EQ("value", GetImpl("key"));
ASSERT_EQ("value", GetImpl("key", &is_blob_index));
ASSERT_FALSE(is_blob_index);
// Verify blob index
if (tier <= kImmutableMemtables) {
ASSERT_TRUE(Get("blob_key", &value).IsNotSupported());
ASSERT_EQ("NOT_SUPPORTED", GetImpl("blob_key"));
} else {
ASSERT_TRUE(Get("blob_key", &value).IsCorruption());
ASSERT_EQ("CORRUPTION", GetImpl("blob_key"));
}
ASSERT_EQ(blob_index, GetImpl("blob_key", &is_blob_index));
ASSERT_TRUE(is_blob_index);
}
}
// Note: the following test case pertains to the StackableDB-based BlobDB
// implementation. Get should NOT return Status::NotSupported/Status::Corruption
// if blob index is updated with a normal value. See the test case above for
// more details.
TEST_F(DBBlobIndexTest, Updated) {
std::string blob_index;
BlobIndex::EncodeInlinedTTL(&blob_index, /* expiration */ 9876543210, "blob");
for (auto tier : kAllTiers) {
DestroyAndReopen(GetTestOptions());
WriteBatch batch;
for (int i = 0; i < 10; i++) {
ASSERT_OK(PutBlobIndex(&batch, "key" + std::to_string(i), blob_index));
}
ASSERT_OK(Write(&batch));
// Avoid blob values from being purged.
const Snapshot* snapshot = dbfull()->GetSnapshot();
ASSERT_OK(Put("key1", "new_value"));
ASSERT_OK(Merge("key2", "a"));
ASSERT_OK(Merge("key2", "b"));
ASSERT_OK(Merge("key2", "c"));
ASSERT_OK(Delete("key3"));
ASSERT_OK(SingleDelete("key4"));
ASSERT_OK(Delete("key5"));
ASSERT_OK(Merge("key5", "a"));
ASSERT_OK(Merge("key5", "b"));
ASSERT_OK(Merge("key5", "c"));
ASSERT_OK(dbfull()->DeleteRange(WriteOptions(), cfh(), "key6", "key9"));
MoveDataTo(tier);
for (int i = 0; i < 10; i++) {
ASSERT_EQ(blob_index, GetBlobIndex("key" + std::to_string(i), snapshot));
}
ASSERT_EQ("new_value", Get("key1"));
if (tier <= kImmutableMemtables) {
ASSERT_EQ("NOT_SUPPORTED", GetImpl("key2"));
} else {
ASSERT_EQ("CORRUPTION", GetImpl("key2"));
}
ASSERT_EQ("NOT_FOUND", Get("key3"));
ASSERT_EQ("NOT_FOUND", Get("key4"));
ASSERT_EQ("a,b,c", GetImpl("key5"));
for (int i = 6; i < 9; i++) {
ASSERT_EQ("NOT_FOUND", Get("key" + std::to_string(i)));
}
ASSERT_EQ(blob_index, GetBlobIndex("key9"));
dbfull()->ReleaseSnapshot(snapshot);
}
}
// Note: the following test case pertains to the StackableDB-based BlobDB
// implementation. When a blob iterator is used, it should set the
// expose_blob_index flag for the underlying DBIter, and retrieve/return the
// corresponding blob value. If a regular DBIter is created (i.e.
// expose_blob_index is not set), it should return Status::Corruption.
TEST_F(DBBlobIndexTest, Iterate) {
const std::vector<std::vector<ValueType>> data = {
/*00*/ {kTypeValue},
/*01*/ {kTypeBlobIndex},
/*02*/ {kTypeValue},
/*03*/ {kTypeBlobIndex, kTypeValue},
/*04*/ {kTypeValue},
/*05*/ {kTypeValue, kTypeBlobIndex},
/*06*/ {kTypeValue},
/*07*/ {kTypeDeletion, kTypeBlobIndex},
/*08*/ {kTypeValue},
/*09*/ {kTypeSingleDeletion, kTypeBlobIndex},
/*10*/ {kTypeValue},
/*11*/ {kTypeMerge, kTypeMerge, kTypeMerge, kTypeBlobIndex},
/*12*/ {kTypeValue},
/*13*/
{kTypeMerge, kTypeMerge, kTypeMerge, kTypeDeletion, kTypeBlobIndex},
/*14*/ {kTypeValue},
/*15*/ {kTypeBlobIndex},
/*16*/ {kTypeValue},
};
auto get_key = [](int index) {
char buf[20];
snprintf(buf, sizeof(buf), "%02d", index);
return "key" + std::string(buf);
};
auto get_value = [&](int index, int version) {
return get_key(index) + "_value" + std::to_string(version);
};
auto check_iterator = [&](Iterator* iterator, Status::Code expected_status,
const Slice& expected_value) {
ASSERT_EQ(expected_status, iterator->status().code());
if (expected_status == Status::kOk) {
ASSERT_TRUE(iterator->Valid());
ASSERT_EQ(expected_value, iterator->value());
} else {
ASSERT_FALSE(iterator->Valid());
}
};
auto create_normal_iterator = [&]() -> Iterator* {
return dbfull()->NewIterator(ReadOptions());
};
auto create_blob_iterator = [&]() -> Iterator* { return GetBlobIterator(); };
auto check_is_blob = [&](bool is_blob) {
return [is_blob](Iterator* iterator) {
ASSERT_EQ(is_blob,
reinterpret_cast<ArenaWrappedDBIter*>(iterator)->IsBlob());
};
};
auto verify = [&](int index, Status::Code expected_status,
const Slice& forward_value, const Slice& backward_value,
std::function<Iterator*()> create_iterator,
std::function<void(Iterator*)> extra_check = nullptr) {
// Seek
auto* iterator = create_iterator();
ASSERT_OK(iterator->status());
ASSERT_OK(iterator->Refresh());
iterator->Seek(get_key(index));
check_iterator(iterator, expected_status, forward_value);
if (extra_check) {
extra_check(iterator);
}
delete iterator;
// Next
iterator = create_iterator();
ASSERT_OK(iterator->Refresh());
iterator->Seek(get_key(index - 1));
ASSERT_TRUE(iterator->Valid());
ASSERT_OK(iterator->status());
iterator->Next();
check_iterator(iterator, expected_status, forward_value);
if (extra_check) {
extra_check(iterator);
}
delete iterator;
// SeekForPrev
iterator = create_iterator();
ASSERT_OK(iterator->status());
ASSERT_OK(iterator->Refresh());
iterator->SeekForPrev(get_key(index));
check_iterator(iterator, expected_status, backward_value);
if (extra_check) {
extra_check(iterator);
}
delete iterator;
// Prev
iterator = create_iterator();
iterator->Seek(get_key(index + 1));
ASSERT_TRUE(iterator->Valid());
ASSERT_OK(iterator->status());
iterator->Prev();
check_iterator(iterator, expected_status, backward_value);
if (extra_check) {
extra_check(iterator);
}
delete iterator;
};
for (auto tier : {Tier::kMemtable} /*kAllTiers*/) {
// Avoid values from being purged.
std::vector<const Snapshot*> snapshots;
DestroyAndReopen(GetTestOptions());
// fill data
for (int i = 0; i < static_cast<int>(data.size()); i++) {
for (int j = static_cast<int>(data[i].size()) - 1; j >= 0; j--) {
std::string key = get_key(i);
std::string value = get_value(i, j);
WriteBatch batch;
switch (data[i][j]) {
case kTypeValue:
ASSERT_OK(Put(key, value));
break;
case kTypeDeletion:
ASSERT_OK(Delete(key));
break;
case kTypeSingleDeletion:
ASSERT_OK(SingleDelete(key));
break;
case kTypeMerge:
ASSERT_OK(Merge(key, value));
break;
case kTypeBlobIndex:
ASSERT_OK(PutBlobIndex(&batch, key, value));
ASSERT_OK(Write(&batch));
break;
default:
FAIL();
};
}
snapshots.push_back(dbfull()->GetSnapshot());
}
ASSERT_OK(
dbfull()->DeleteRange(WriteOptions(), cfh(), get_key(15), get_key(16)));
snapshots.push_back(dbfull()->GetSnapshot());
MoveDataTo(tier);
// Normal iterator
verify(1, Status::kCorruption, "", "", create_normal_iterator);
verify(3, Status::kCorruption, "", "", create_normal_iterator);
verify(5, Status::kOk, get_value(5, 0), get_value(5, 0),
create_normal_iterator);
verify(7, Status::kOk, get_value(8, 0), get_value(6, 0),
create_normal_iterator);
verify(9, Status::kOk, get_value(10, 0), get_value(8, 0),
create_normal_iterator);
verify(11, Status::kCorruption, "", "", create_normal_iterator);
verify(13, Status::kOk,
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
create_normal_iterator);
verify(15, Status::kOk, get_value(16, 0), get_value(14, 0),
create_normal_iterator);
// Iterator with blob support
verify(1, Status::kOk, get_value(1, 0), get_value(1, 0),
create_blob_iterator, check_is_blob(true));
verify(3, Status::kOk, get_value(3, 0), get_value(3, 0),
create_blob_iterator, check_is_blob(true));
verify(5, Status::kOk, get_value(5, 0), get_value(5, 0),
create_blob_iterator, check_is_blob(false));
verify(7, Status::kOk, get_value(8, 0), get_value(6, 0),
create_blob_iterator, check_is_blob(false));
verify(9, Status::kOk, get_value(10, 0), get_value(8, 0),
create_blob_iterator, check_is_blob(false));
if (tier <= kImmutableMemtables) {
verify(11, Status::kNotSupported, "", "", create_blob_iterator);
} else {
verify(11, Status::kCorruption, "", "", create_blob_iterator);
}
verify(13, Status::kOk,
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
create_blob_iterator, check_is_blob(false));
verify(15, Status::kOk, get_value(16, 0), get_value(14, 0),
create_blob_iterator, check_is_blob(false));
// Iterator with blob support and using seek.
ASSERT_OK(dbfull()->SetOptions(
cfh(), {{"max_sequential_skip_in_iterations", "0"}}));
verify(1, Status::kOk, get_value(1, 0), get_value(1, 0),
create_blob_iterator, check_is_blob(true));
verify(3, Status::kOk, get_value(3, 0), get_value(3, 0),
create_blob_iterator, check_is_blob(true));
verify(5, Status::kOk, get_value(5, 0), get_value(5, 0),
create_blob_iterator, check_is_blob(false));
verify(7, Status::kOk, get_value(8, 0), get_value(6, 0),
create_blob_iterator, check_is_blob(false));
verify(9, Status::kOk, get_value(10, 0), get_value(8, 0),
create_blob_iterator, check_is_blob(false));
if (tier <= kImmutableMemtables) {
verify(11, Status::kNotSupported, "", "", create_blob_iterator);
} else {
verify(11, Status::kCorruption, "", "", create_blob_iterator);
}
verify(13, Status::kOk,
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
get_value(13, 2) + "," + get_value(13, 1) + "," + get_value(13, 0),
create_blob_iterator, check_is_blob(false));
verify(15, Status::kOk, get_value(16, 0), get_value(14, 0),
create_blob_iterator, check_is_blob(false));
for (auto* snapshot : snapshots) {
dbfull()->ReleaseSnapshot(snapshot);
}
}
}
TEST_F(DBBlobIndexTest, IntegratedBlobIterate) {
const std::vector<std::vector<std::string>> data = {
/*00*/ {"Put"},
/*01*/ {"Put", "Merge", "Merge", "Merge"},
/*02*/ {"Put"}};
auto get_key = [](size_t index) { return ("key" + std::to_string(index)); };
auto get_value = [&](size_t index, size_t version) {
return get_key(index) + "_value" + std::to_string(version);
};
auto check_iterator = [&](Iterator* iterator, Status expected_status,
const Slice& expected_value) {
ASSERT_EQ(expected_status, iterator->status());
if (expected_status.ok()) {
ASSERT_TRUE(iterator->Valid());
ASSERT_EQ(expected_value, iterator->value());
} else {
ASSERT_FALSE(iterator->Valid());
}
};
auto verify = [&](size_t index, Status expected_status,
const Slice& expected_value) {
// Seek
{
Iterator* iterator = db_->NewIterator(ReadOptions());
std::unique_ptr<Iterator> iterator_guard(iterator);
ASSERT_OK(iterator->status());
ASSERT_OK(iterator->Refresh());
iterator->Seek(get_key(index));
check_iterator(iterator, expected_status, expected_value);
}
// Next
{
Iterator* iterator = db_->NewIterator(ReadOptions());
std::unique_ptr<Iterator> iterator_guard(iterator);
ASSERT_OK(iterator->Refresh());
iterator->Seek(get_key(index - 1));
ASSERT_TRUE(iterator->Valid());
ASSERT_OK(iterator->status());
iterator->Next();
check_iterator(iterator, expected_status, expected_value);
}
// SeekForPrev
{
Iterator* iterator = db_->NewIterator(ReadOptions());
std::unique_ptr<Iterator> iterator_guard(iterator);
ASSERT_OK(iterator->status());
ASSERT_OK(iterator->Refresh());
iterator->SeekForPrev(get_key(index));
check_iterator(iterator, expected_status, expected_value);
}
// Prev
{
Iterator* iterator = db_->NewIterator(ReadOptions());
std::unique_ptr<Iterator> iterator_guard(iterator);
iterator->Seek(get_key(index + 1));
ASSERT_TRUE(iterator->Valid());
ASSERT_OK(iterator->status());
iterator->Prev();
check_iterator(iterator, expected_status, expected_value);
}
};
Options options = GetTestOptions();
options.enable_blob_files = true;
options.min_blob_size = 0;
DestroyAndReopen(options);
// fill data
for (size_t i = 0; i < data.size(); i++) {
for (size_t j = 0; j < data[i].size(); j++) {
std::string key = get_key(i);
std::string value = get_value(i, j);
if (data[i][j] == "Put") {
ASSERT_OK(Put(key, value));
ASSERT_OK(Flush());
} else if (data[i][j] == "Merge") {
ASSERT_OK(Merge(key, value));
ASSERT_OK(Flush());
}
}
}
std::string expected_value = get_value(1, 0) + "," + get_value(1, 1) + "," +
get_value(1, 2) + "," + get_value(1, 3);
Status expected_status;
verify(1, expected_status, expected_value);
// Test DBIter::FindValueForCurrentKeyUsingSeek flow.
ASSERT_OK(dbfull()->SetOptions(cfh(),
{{"max_sequential_skip_in_iterations", "0"}}));
verify(1, expected_status, expected_value);
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
RegisterCustomObjects(argc, argv);
return RUN_ALL_TESTS();
}