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rocksdb/table/block_based/block_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).
//
#include "table/block_based/block.h"
#include <stdio.h>
#include <algorithm>
#include <set>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>
#include "db/db_test_util.h"
#include "db/dbformat.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/iterator.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/table.h"
#include "table/block_based/block_based_table_reader.h"
#include "table/block_based/block_builder.h"
#include "table/format.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
std::string GenerateInternalKey(int primary_key, int secondary_key,
int padding_size, Random *rnd,
size_t ts_sz = 0) {
char buf[50];
char *p = &buf[0];
snprintf(buf, sizeof(buf), "%6d%4d", primary_key, secondary_key);
std::string k(p);
if (padding_size) {
k += rnd->RandomString(padding_size);
}
AppendInternalKeyFooter(&k, 0 /* seqno */, kTypeValue);
std::string key_with_ts;
if (ts_sz > 0) {
PadInternalKeyWithMinTimestamp(&key_with_ts, k, ts_sz);
return key_with_ts;
}
return k;
}
// Generate random key value pairs.
// The generated key will be sorted. You can tune the parameters to generated
// different kinds of test key/value pairs for different scenario.
void GenerateRandomKVs(std::vector<std::string> *keys,
std::vector<std::string> *values, const int from,
const int len, const int step = 1,
const int padding_size = 0,
const int keys_share_prefix = 1, size_t ts_sz = 0) {
Random rnd(302);
// generate different prefix
for (int i = from; i < from + len; i += step) {
// generating keys that shares the prefix
for (int j = 0; j < keys_share_prefix; ++j) {
// `DataBlockIter` assumes it reads only internal keys.
keys->emplace_back(GenerateInternalKey(i, j, padding_size, &rnd, ts_sz));
// 100 bytes values
values->emplace_back(rnd.RandomString(100));
}
}
}
// Test Param 1): key use delta encoding.
// Test Param 2): user-defined timestamp test mode.
// Test Param 3): data block index type.
class BlockTest : public testing::Test,
public testing::WithParamInterface<
std::tuple<bool, test::UserDefinedTimestampTestMode,
BlockBasedTableOptions::DataBlockIndexType>> {
public:
bool keyUseDeltaEncoding() const { return std::get<0>(GetParam()); }
bool isUDTEnabled() const {
return test::IsUDTEnabled(std::get<1>(GetParam()));
}
bool shouldPersistUDT() const {
return test::ShouldPersistUDT(std::get<1>(GetParam()));
}
BlockBasedTableOptions::DataBlockIndexType dataBlockIndexType() const {
return std::get<2>(GetParam());
}
};
// block test
TEST_P(BlockTest, SimpleTest) {
Random rnd(301);
Options options = Options();
if (isUDTEnabled()) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
}
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::string> keys;
std::vector<std::string> values;
BlockBasedTableOptions::DataBlockIndexType index_type =
isUDTEnabled() ? BlockBasedTableOptions::kDataBlockBinarySearch
: dataBlockIndexType();
BlockBuilder builder(16, keyUseDeltaEncoding(),
false /* use_value_delta_encoding */, index_type,
0.75 /* data_block_hash_table_util_ratio */, ts_sz,
shouldPersistUDT(), false /* is_user_key */);
int num_records = 100000;
GenerateRandomKVs(&keys, &values, 0, num_records, 1 /* step */,
0 /* padding_size */, 1 /* keys_share_prefix */, ts_sz);
// add a bunch of records to a block
for (int i = 0; i < num_records; i++) {
builder.Add(keys[i], values[i]);
}
// read serialized contents of the block
Slice rawblock = builder.Finish();
// create block reader
BlockContents contents;
contents.data = rawblock;
Block reader(std::move(contents));
// read contents of block sequentially
int count = 0;
InternalIterator *iter = reader.NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr /* iter */,
nullptr /* stats */, false /* block_contents_pinned */,
shouldPersistUDT());
for (iter->SeekToFirst(); iter->Valid(); count++, iter->Next()) {
// read kv from block
Slice k = iter->key();
Slice v = iter->value();
// compare with lookaside array
ASSERT_EQ(k.ToString().compare(keys[count]), 0);
ASSERT_EQ(v.ToString().compare(values[count]), 0);
}
delete iter;
// read block contents randomly
iter = reader.NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr /* iter */,
nullptr /* stats */, false /* block_contents_pinned */,
shouldPersistUDT());
for (int i = 0; i < num_records; i++) {
// find a random key in the lookaside array
int index = rnd.Uniform(num_records);
Slice k(keys[index]);
// search in block for this key
iter->Seek(k);
ASSERT_TRUE(iter->Valid());
Slice v = iter->value();
ASSERT_EQ(v.ToString().compare(values[index]), 0);
}
delete iter;
}
// return the block contents
BlockContents GetBlockContents(
std::unique_ptr<BlockBuilder> *builder,
const std::vector<std::string> &keys,
const std::vector<std::string> &values, bool key_use_delta_encoding,
size_t ts_sz, bool should_persist_udt, const int /*prefix_group_size*/ = 1,
BlockBasedTableOptions::DataBlockIndexType dblock_index_type =
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch) {
builder->reset(
new BlockBuilder(1 /* restart interval */, key_use_delta_encoding,
false /* use_value_delta_encoding */, dblock_index_type,
0.75 /* data_block_hash_table_util_ratio */, ts_sz,
should_persist_udt, false /* is_user_key */));
// Add only half of the keys
for (size_t i = 0; i < keys.size(); ++i) {
(*builder)->Add(keys[i], values[i]);
}
Slice rawblock = (*builder)->Finish();
BlockContents contents;
contents.data = rawblock;
return contents;
}
void CheckBlockContents(BlockContents contents, const int max_key,
const std::vector<std::string> &keys,
const std::vector<std::string> &values,
bool is_udt_enabled, bool should_persist_udt) {
const size_t prefix_size = 6;
// create block reader
BlockContents contents_ref(contents.data);
Block reader1(std::move(contents));
Block reader2(std::move(contents_ref));
std::unique_ptr<const SliceTransform> prefix_extractor(
NewFixedPrefixTransform(prefix_size));
std::unique_ptr<InternalIterator> regular_iter(reader2.NewDataIterator(
is_udt_enabled ? test::BytewiseComparatorWithU64TsWrapper()
: BytewiseComparator(),
kDisableGlobalSequenceNumber, nullptr /* iter */, nullptr /* stats */,
false /* block_contents_pinned */, should_persist_udt));
// Seek existent keys
for (size_t i = 0; i < keys.size(); i++) {
regular_iter->Seek(keys[i]);
ASSERT_OK(regular_iter->status());
ASSERT_TRUE(regular_iter->Valid());
Slice v = regular_iter->value();
ASSERT_EQ(v.ToString().compare(values[i]), 0);
}
// Seek non-existent keys.
// For hash index, if no key with a given prefix is not found, iterator will
// simply be set as invalid; whereas the binary search based iterator will
// return the one that is closest.
for (int i = 1; i < max_key - 1; i += 2) {
// `DataBlockIter` assumes its APIs receive only internal keys.
auto key = GenerateInternalKey(i, 0, 0, nullptr,
is_udt_enabled ? 8 : 0 /* ts_sz */);
regular_iter->Seek(key);
ASSERT_TRUE(regular_iter->Valid());
}
}
// In this test case, no two key share same prefix.
TEST_P(BlockTest, SimpleIndexHash) {
const int kMaxKey = 100000;
size_t ts_sz = isUDTEnabled() ? 8 : 0;
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0 /* first key id */,
kMaxKey /* last key id */, 2 /* step */,
8 /* padding size (8 bytes randomly generated suffix) */,
1 /* keys_share_prefix */, ts_sz);
std::unique_ptr<BlockBuilder> builder;
auto contents = GetBlockContents(
&builder, keys, values, keyUseDeltaEncoding(), ts_sz, shouldPersistUDT(),
1 /* prefix_group_size */,
isUDTEnabled()
? BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch
: dataBlockIndexType());
CheckBlockContents(std::move(contents), kMaxKey, keys, values, isUDTEnabled(),
shouldPersistUDT());
}
TEST_P(BlockTest, IndexHashWithSharedPrefix) {
const int kMaxKey = 100000;
// for each prefix, there will be 5 keys starts with it.
const int kPrefixGroup = 5;
size_t ts_sz = isUDTEnabled() ? 8 : 0;
std::vector<std::string> keys;
std::vector<std::string> values;
// Generate keys with same prefix.
GenerateRandomKVs(&keys, &values, 0, // first key id
kMaxKey, // last key id
2 /* step */,
10 /* padding size (8 bytes randomly generated suffix) */,
kPrefixGroup /* keys_share_prefix */, ts_sz);
std::unique_ptr<BlockBuilder> builder;
auto contents = GetBlockContents(
&builder, keys, values, keyUseDeltaEncoding(), isUDTEnabled(),
shouldPersistUDT(), kPrefixGroup,
isUDTEnabled()
? BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch
: dataBlockIndexType());
CheckBlockContents(std::move(contents), kMaxKey, keys, values, isUDTEnabled(),
shouldPersistUDT());
}
// Param 0: key use delta encoding
// Param 1: user-defined timestamp test mode
// Param 2: data block index type. User-defined timestamp feature is not
// compatible with `kDataBlockBinaryAndHash` data block index type because the
// user comparator doesn't provide a `CanKeysWithDifferentByteContentsBeEqual`
// override. This combination is disabled.
INSTANTIATE_TEST_CASE_P(
P, BlockTest,
::testing::Combine(
::testing::Bool(), ::testing::ValuesIn(test::GetUDTTestModes()),
::testing::Values(
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch,
BlockBasedTableOptions::DataBlockIndexType::
kDataBlockBinaryAndHash)));
// A slow and accurate version of BlockReadAmpBitmap that simply store
// all the marked ranges in a set.
class BlockReadAmpBitmapSlowAndAccurate {
public:
void Mark(size_t start_offset, size_t end_offset) {
assert(end_offset >= start_offset);
marked_ranges_.emplace(end_offset, start_offset);
}
void ResetCheckSequence() { iter_valid_ = false; }
// Return true if any byte in this range was Marked
// This does linear search from the previous position. When calling
// multiple times, `offset` needs to be incremental to get correct results.
// Call ResetCheckSequence() to reset it.
bool IsPinMarked(size_t offset) {
if (iter_valid_) {
// Has existing iterator, try linear search from
// the iterator.
for (int i = 0; i < 64; i++) {
if (offset < iter_->second) {
return false;
}
if (offset <= iter_->first) {
return true;
}
iter_++;
if (iter_ == marked_ranges_.end()) {
iter_valid_ = false;
return false;
}
}
}
// Initial call or have linear searched too many times.
// Do binary search.
iter_ = marked_ranges_.lower_bound(
std::make_pair(offset, static_cast<size_t>(0)));
if (iter_ == marked_ranges_.end()) {
iter_valid_ = false;
return false;
}
iter_valid_ = true;
return offset <= iter_->first && offset >= iter_->second;
}
private:
std::set<std::pair<size_t, size_t>> marked_ranges_;
std::set<std::pair<size_t, size_t>>::iterator iter_;
bool iter_valid_ = false;
};
TEST_F(BlockTest, BlockReadAmpBitmap) {
uint32_t pin_offset = 0;
SyncPoint::GetInstance()->SetCallBack(
"BlockReadAmpBitmap:rnd", [&pin_offset](void *arg) {
pin_offset = *(static_cast<uint32_t *>(arg));
});
SyncPoint::GetInstance()->EnableProcessing();
std::vector<size_t> block_sizes = {
1, // 1 byte
32, // 32 bytes
61, // 61 bytes
64, // 64 bytes
512, // 0.5 KB
1024, // 1 KB
1024 * 4, // 4 KB
1024 * 10, // 10 KB
1024 * 50, // 50 KB
1024 * 1024 * 4, // 5 MB
777,
124653,
};
const size_t kBytesPerBit = 64;
Random rnd(301);
for (size_t block_size : block_sizes) {
std::shared_ptr<Statistics> stats = ROCKSDB_NAMESPACE::CreateDBStatistics();
BlockReadAmpBitmap read_amp_bitmap(block_size, kBytesPerBit, stats.get());
BlockReadAmpBitmapSlowAndAccurate read_amp_slow_and_accurate;
size_t needed_bits = (block_size / kBytesPerBit);
if (block_size % kBytesPerBit != 0) {
needed_bits++;
}
ASSERT_EQ(stats->getTickerCount(READ_AMP_TOTAL_READ_BYTES), block_size);
// Generate some random entries
std::vector<size_t> random_entry_offsets;
for (int i = 0; i < 1000; i++) {
random_entry_offsets.push_back(rnd.Next() % block_size);
}
std::sort(random_entry_offsets.begin(), random_entry_offsets.end());
auto it =
std::unique(random_entry_offsets.begin(), random_entry_offsets.end());
random_entry_offsets.resize(
std::distance(random_entry_offsets.begin(), it));
std::vector<std::pair<size_t, size_t>> random_entries;
for (size_t i = 0; i < random_entry_offsets.size(); i++) {
size_t entry_start = random_entry_offsets[i];
size_t entry_end;
if (i + 1 < random_entry_offsets.size()) {
entry_end = random_entry_offsets[i + 1] - 1;
} else {
entry_end = block_size - 1;
}
random_entries.emplace_back(entry_start, entry_end);
}
for (size_t i = 0; i < random_entries.size(); i++) {
read_amp_slow_and_accurate.ResetCheckSequence();
auto &current_entry = random_entries[rnd.Next() % random_entries.size()];
read_amp_bitmap.Mark(static_cast<uint32_t>(current_entry.first),
static_cast<uint32_t>(current_entry.second));
read_amp_slow_and_accurate.Mark(current_entry.first,
current_entry.second);
size_t total_bits = 0;
for (size_t bit_idx = 0; bit_idx < needed_bits; bit_idx++) {
total_bits += read_amp_slow_and_accurate.IsPinMarked(
bit_idx * kBytesPerBit + pin_offset);
}
size_t expected_estimate_useful = total_bits * kBytesPerBit;
size_t got_estimate_useful =
stats->getTickerCount(READ_AMP_ESTIMATE_USEFUL_BYTES);
ASSERT_EQ(expected_estimate_useful, got_estimate_useful);
}
}
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_F(BlockTest, BlockWithReadAmpBitmap) {
Random rnd(301);
Options options = Options();
std::vector<std::string> keys;
std::vector<std::string> values;
BlockBuilder builder(16);
int num_records = 10000;
GenerateRandomKVs(&keys, &values, 0, num_records, 1 /* step */);
// add a bunch of records to a block
for (int i = 0; i < num_records; i++) {
builder.Add(keys[i], values[i]);
}
Slice rawblock = builder.Finish();
const size_t kBytesPerBit = 8;
// Read the block sequentially using Next()
{
std::shared_ptr<Statistics> stats = ROCKSDB_NAMESPACE::CreateDBStatistics();
// create block reader
BlockContents contents;
contents.data = rawblock;
Block reader(std::move(contents), kBytesPerBit, stats.get());
// read contents of block sequentially
size_t read_bytes = 0;
DataBlockIter *iter = reader.NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr, stats.get());
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
iter->value();
read_bytes += iter->TEST_CurrentEntrySize();
double semi_acc_read_amp =
static_cast<double>(read_bytes) / rawblock.size();
double read_amp = static_cast<double>(stats->getTickerCount(
READ_AMP_ESTIMATE_USEFUL_BYTES)) /
stats->getTickerCount(READ_AMP_TOTAL_READ_BYTES);
// Error in read amplification will be less than 1% if we are reading
// sequentially
double error_pct = fabs(semi_acc_read_amp - read_amp) * 100;
EXPECT_LT(error_pct, 1);
}
delete iter;
}
// Read the block sequentially using Seek()
{
std::shared_ptr<Statistics> stats = ROCKSDB_NAMESPACE::CreateDBStatistics();
// create block reader
BlockContents contents;
contents.data = rawblock;
Block reader(std::move(contents), kBytesPerBit, stats.get());
size_t read_bytes = 0;
DataBlockIter *iter = reader.NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr, stats.get());
for (int i = 0; i < num_records; i++) {
Slice k(keys[i]);
// search in block for this key
iter->Seek(k);
iter->value();
read_bytes += iter->TEST_CurrentEntrySize();
double semi_acc_read_amp =
static_cast<double>(read_bytes) / rawblock.size();
double read_amp = static_cast<double>(stats->getTickerCount(
READ_AMP_ESTIMATE_USEFUL_BYTES)) /
stats->getTickerCount(READ_AMP_TOTAL_READ_BYTES);
// Error in read amplification will be less than 1% if we are reading
// sequentially
double error_pct = fabs(semi_acc_read_amp - read_amp) * 100;
EXPECT_LT(error_pct, 1);
}
delete iter;
}
// Read the block randomly
{
std::shared_ptr<Statistics> stats = ROCKSDB_NAMESPACE::CreateDBStatistics();
// create block reader
BlockContents contents;
contents.data = rawblock;
Block reader(std::move(contents), kBytesPerBit, stats.get());
size_t read_bytes = 0;
DataBlockIter *iter = reader.NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr, stats.get());
std::unordered_set<int> read_keys;
for (int i = 0; i < num_records; i++) {
int index = rnd.Uniform(num_records);
Slice k(keys[index]);
iter->Seek(k);
iter->value();
if (read_keys.find(index) == read_keys.end()) {
read_keys.insert(index);
read_bytes += iter->TEST_CurrentEntrySize();
}
double semi_acc_read_amp =
static_cast<double>(read_bytes) / rawblock.size();
double read_amp = static_cast<double>(stats->getTickerCount(
READ_AMP_ESTIMATE_USEFUL_BYTES)) /
stats->getTickerCount(READ_AMP_TOTAL_READ_BYTES);
double error_pct = fabs(semi_acc_read_amp - read_amp) * 100;
// Error in read amplification will be less than 2% if we are reading
// randomly
EXPECT_LT(error_pct, 2);
}
delete iter;
}
}
TEST_F(BlockTest, ReadAmpBitmapPow2) {
std::shared_ptr<Statistics> stats = ROCKSDB_NAMESPACE::CreateDBStatistics();
ASSERT_EQ(BlockReadAmpBitmap(100, 1, stats.get()).GetBytesPerBit(), 1u);
ASSERT_EQ(BlockReadAmpBitmap(100, 2, stats.get()).GetBytesPerBit(), 2u);
ASSERT_EQ(BlockReadAmpBitmap(100, 4, stats.get()).GetBytesPerBit(), 4u);
ASSERT_EQ(BlockReadAmpBitmap(100, 8, stats.get()).GetBytesPerBit(), 8u);
ASSERT_EQ(BlockReadAmpBitmap(100, 16, stats.get()).GetBytesPerBit(), 16u);
ASSERT_EQ(BlockReadAmpBitmap(100, 32, stats.get()).GetBytesPerBit(), 32u);
ASSERT_EQ(BlockReadAmpBitmap(100, 3, stats.get()).GetBytesPerBit(), 2u);
ASSERT_EQ(BlockReadAmpBitmap(100, 7, stats.get()).GetBytesPerBit(), 4u);
ASSERT_EQ(BlockReadAmpBitmap(100, 11, stats.get()).GetBytesPerBit(), 8u);
ASSERT_EQ(BlockReadAmpBitmap(100, 17, stats.get()).GetBytesPerBit(), 16u);
ASSERT_EQ(BlockReadAmpBitmap(100, 33, stats.get()).GetBytesPerBit(), 32u);
ASSERT_EQ(BlockReadAmpBitmap(100, 35, stats.get()).GetBytesPerBit(), 32u);
}
class IndexBlockTest
: public testing::Test,
public testing::WithParamInterface<
std::tuple<bool, bool, bool, test::UserDefinedTimestampTestMode>> {
public:
IndexBlockTest() = default;
bool keyIncludesSeq() const { return std::get<0>(GetParam()); }
bool useValueDeltaEncoding() const { return std::get<1>(GetParam()); }
bool includeFirstKey() const { return std::get<2>(GetParam()); }
bool isUDTEnabled() const {
return test::IsUDTEnabled(std::get<3>(GetParam()));
}
bool shouldPersistUDT() const {
return test::ShouldPersistUDT(std::get<3>(GetParam()));
}
};
// Similar to GenerateRandomKVs but for index block contents.
void GenerateRandomIndexEntries(std::vector<std::string> *separators,
std::vector<BlockHandle> *block_handles,
std::vector<std::string> *first_keys,
const int len, size_t ts_sz = 0,
bool zero_seqno = false) {
Random rnd(42);
// For each of `len` blocks, we need to generate a first and last key.
// Let's generate n*2 random keys, sort them, group into consecutive pairs.
std::set<std::string> keys;
while ((int)keys.size() < len * 2) {
// Keys need to be at least 8 bytes long to look like internal keys.
std::string new_key = test::RandomKey(&rnd, 12);
if (zero_seqno) {
AppendInternalKeyFooter(&new_key, 0 /* seqno */, kTypeValue);
}
if (ts_sz > 0) {
std::string key;
PadInternalKeyWithMinTimestamp(&key, new_key, ts_sz);
keys.insert(std::move(key));
} else {
keys.insert(std::move(new_key));
}
}
uint64_t offset = 0;
for (auto it = keys.begin(); it != keys.end();) {
first_keys->emplace_back(*it++);
separators->emplace_back(*it++);
uint64_t size = rnd.Uniform(1024 * 16);
BlockHandle handle(offset, size);
offset += size + BlockBasedTable::kBlockTrailerSize;
block_handles->emplace_back(handle);
}
}
TEST_P(IndexBlockTest, IndexValueEncodingTest) {
Random rnd(301);
Options options = Options();
if (isUDTEnabled()) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
}
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::string> separators;
std::vector<BlockHandle> block_handles;
std::vector<std::string> first_keys;
const bool kUseDeltaEncoding = true;
BlockBuilder builder(16, kUseDeltaEncoding, useValueDeltaEncoding(),
BlockBasedTableOptions::kDataBlockBinarySearch,
0.75 /* data_block_hash_table_util_ratio */, ts_sz,
shouldPersistUDT(), !keyIncludesSeq());
int num_records = 100;
GenerateRandomIndexEntries(&separators, &block_handles, &first_keys,
num_records, ts_sz, false /* zero_seqno */);
BlockHandle last_encoded_handle;
for (int i = 0; i < num_records; i++) {
std::string first_key_to_persist_buf;
Slice first_internal_key = first_keys[i];
if (ts_sz > 0 && !shouldPersistUDT()) {
StripTimestampFromInternalKey(&first_key_to_persist_buf, first_keys[i],
ts_sz);
first_internal_key = first_key_to_persist_buf;
}
IndexValue entry(block_handles[i], first_internal_key);
std::string encoded_entry;
std::string delta_encoded_entry;
entry.EncodeTo(&encoded_entry, includeFirstKey(), nullptr);
if (useValueDeltaEncoding() && i > 0) {
entry.EncodeTo(&delta_encoded_entry, includeFirstKey(),
&last_encoded_handle);
}
last_encoded_handle = entry.handle;
const Slice delta_encoded_entry_slice(delta_encoded_entry);
if (keyIncludesSeq()) {
builder.Add(separators[i], encoded_entry, &delta_encoded_entry_slice);
} else {
const Slice user_key = ExtractUserKey(separators[i]);
builder.Add(user_key, encoded_entry, &delta_encoded_entry_slice);
}
}
// read serialized contents of the block
Slice rawblock = builder.Finish();
// create block reader
BlockContents contents;
contents.data = rawblock;
Block reader(std::move(contents));
const bool kTotalOrderSeek = true;
IndexBlockIter *kNullIter = nullptr;
Statistics *kNullStats = nullptr;
// read contents of block sequentially
InternalIteratorBase<IndexValue> *iter = reader.NewIndexIterator(
options.comparator, kDisableGlobalSequenceNumber, kNullIter, kNullStats,
kTotalOrderSeek, includeFirstKey(), keyIncludesSeq(),
!useValueDeltaEncoding(), false /* block_contents_pinned */,
shouldPersistUDT());
iter->SeekToFirst();
for (int index = 0; index < num_records; ++index) {
ASSERT_TRUE(iter->Valid());
Slice k = iter->key();
IndexValue v = iter->value();
if (keyIncludesSeq()) {
EXPECT_EQ(separators[index], k.ToString());
} else {
const Slice user_key = ExtractUserKey(separators[index]);
EXPECT_EQ(user_key, k);
}
EXPECT_EQ(block_handles[index].offset(), v.handle.offset());
EXPECT_EQ(block_handles[index].size(), v.handle.size());
EXPECT_EQ(includeFirstKey() ? first_keys[index] : "",
v.first_internal_key.ToString());
iter->Next();
}
delete iter;
// read block contents randomly
iter = reader.NewIndexIterator(
options.comparator, kDisableGlobalSequenceNumber, kNullIter, kNullStats,
kTotalOrderSeek, includeFirstKey(), keyIncludesSeq(),
!useValueDeltaEncoding(), false /* block_contents_pinned */,
shouldPersistUDT());
for (int i = 0; i < num_records * 2; i++) {
// find a random key in the lookaside array
int index = rnd.Uniform(num_records);
Slice k(separators[index]);
// search in block for this key
iter->Seek(k);
ASSERT_TRUE(iter->Valid());
IndexValue v = iter->value();
if (keyIncludesSeq()) {
EXPECT_EQ(separators[index], iter->key().ToString());
} else {
const Slice user_key = ExtractUserKey(separators[index]);
EXPECT_EQ(user_key, iter->key());
}
EXPECT_EQ(block_handles[index].offset(), v.handle.offset());
EXPECT_EQ(block_handles[index].size(), v.handle.size());
EXPECT_EQ(includeFirstKey() ? first_keys[index] : "",
v.first_internal_key.ToString());
}
delete iter;
}
// Param 0: key includes sequence number (whether to use user key or internal
// key as key entry in index block).
// Param 1: use value delta encoding
// Param 2: include first key
// Param 3: user-defined timestamp test mode
INSTANTIATE_TEST_CASE_P(
P, IndexBlockTest,
::testing::Combine(::testing::Bool(), ::testing::Bool(), ::testing::Bool(),
::testing::ValuesIn(test::GetUDTTestModes())));
class BlockPerKVChecksumTest : public DBTestBase {
public:
BlockPerKVChecksumTest()
: DBTestBase("block_per_kv_checksum", /*env_do_fsync=*/false) {}
template <typename TBlockIter>
void TestIterateForward(std::unique_ptr<TBlockIter> &biter,
size_t &verification_count) {
while (biter->Valid()) {
verification_count = 0;
biter->Next();
if (biter->Valid()) {
ASSERT_GE(verification_count, 1);
}
}
}
template <typename TBlockIter>
void TestIterateBackward(std::unique_ptr<TBlockIter> &biter,
size_t &verification_count) {
while (biter->Valid()) {
verification_count = 0;
biter->Prev();
if (biter->Valid()) {
ASSERT_GE(verification_count, 1);
}
}
}
template <typename TBlockIter>
void TestSeekToFirst(std::unique_ptr<TBlockIter> &biter,
size_t &verification_count) {
verification_count = 0;
biter->SeekToFirst();
ASSERT_GE(verification_count, 1);
TestIterateForward(biter, verification_count);
}
template <typename TBlockIter>
void TestSeekToLast(std::unique_ptr<TBlockIter> &biter,
size_t &verification_count) {
verification_count = 0;
biter->SeekToLast();
ASSERT_GE(verification_count, 1);
TestIterateBackward(biter, verification_count);
}
template <typename TBlockIter>
void TestSeekForPrev(std::unique_ptr<TBlockIter> &biter,
size_t &verification_count, std::string k) {
verification_count = 0;
biter->SeekForPrev(k);
ASSERT_GE(verification_count, 1);
TestIterateBackward(biter, verification_count);
}
template <typename TBlockIter>
void TestSeek(std::unique_ptr<TBlockIter> &biter, size_t &verification_count,
std::string k) {
verification_count = 0;
biter->Seek(k);
ASSERT_GE(verification_count, 1);
TestIterateForward(biter, verification_count);
}
bool VerifyChecksum(uint32_t checksum_len, const char *checksum_ptr,
const Slice &key, const Slice &val) {
if (!checksum_len) {
return checksum_ptr == nullptr;
}
return ProtectionInfo64().ProtectKV(key, val).Verify(
static_cast<uint8_t>(checksum_len), checksum_ptr);
}
};
TEST_F(BlockPerKVChecksumTest, EmptyBlock) {
// Tests that empty block code path is not broken by per kv checksum.
BlockBuilder builder(
16 /* block_restart_interval */, true /* use_delta_encoding */,
false /* use_value_delta_encoding */,
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch);
Slice raw_block = builder.Finish();
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kData> data_block;
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = 8;
BlockCreateContext create_context{
&tbo, nullptr /* statistics */, false /* using_zstd */,
protection_bytes_per_key, options.comparator};
create_context.Create(&data_block, std::move(contents));
std::unique_ptr<DataBlockIter> biter{data_block->NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber)};
biter->SeekToFirst();
ASSERT_FALSE(biter->Valid());
ASSERT_OK(biter->status());
Random rnd(33);
biter->SeekForGet(GenerateInternalKey(1, 1, 10, &rnd));
ASSERT_FALSE(biter->Valid());
ASSERT_OK(biter->status());
biter->SeekToLast();
ASSERT_FALSE(biter->Valid());
ASSERT_OK(biter->status());
biter->Seek(GenerateInternalKey(1, 1, 10, &rnd));
ASSERT_FALSE(biter->Valid());
ASSERT_OK(biter->status());
biter->SeekForPrev(GenerateInternalKey(1, 1, 10, &rnd));
ASSERT_FALSE(biter->Valid());
ASSERT_OK(biter->status());
}
TEST_F(BlockPerKVChecksumTest, UnsupportedOptionValue) {
Options options = Options();
options.block_protection_bytes_per_key = 128;
Destroy(options);
ASSERT_TRUE(TryReopen(options).IsNotSupported());
}
TEST_F(BlockPerKVChecksumTest, InitializeProtectionInfo) {
// Make sure that the checksum construction code path does not break
// when the block is itself already corrupted.
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = 8;
BlockCreateContext create_context{
&tbo, nullptr /* statistics */, false /* using_zstd */,
protection_bytes_per_key, options.comparator};
{
std::string invalid_content = "1";
Slice raw_block = invalid_content;
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kData> data_block;
create_context.Create(&data_block, std::move(contents));
std::unique_ptr<DataBlockIter> iter{data_block->NewDataIterator(
options.comparator, kDisableGlobalSequenceNumber)};
ASSERT_TRUE(iter->status().IsCorruption());
}
{
std::string invalid_content = "1";
Slice raw_block = invalid_content;
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kIndex> index_block;
create_context.Create(&index_block, std::move(contents));
std::unique_ptr<IndexBlockIter> iter{index_block->NewIndexIterator(
options.comparator, kDisableGlobalSequenceNumber, nullptr, nullptr,
true, false, true, true)};
ASSERT_TRUE(iter->status().IsCorruption());
}
{
std::string invalid_content = "1";
Slice raw_block = invalid_content;
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kMetaIndex> meta_block;
create_context.Create(&meta_block, std::move(contents));
std::unique_ptr<MetaBlockIter> iter{meta_block->NewMetaIterator(true)};
ASSERT_TRUE(iter->status().IsCorruption());
}
}
TEST_F(BlockPerKVChecksumTest, ApproximateMemory) {
// Tests that ApproximateMemoryUsage() includes memory used by block kv
// checksum.
const int kNumRecords = 20;
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0, kNumRecords, 1 /* step */,
24 /* padding_size */);
std::unique_ptr<BlockBuilder> builder;
auto generate_block_content = [&]() {
builder = std::make_unique<BlockBuilder>(16 /* restart_interval */);
for (int i = 0; i < kNumRecords; ++i) {
builder->Add(keys[i], values[i]);
}
Slice raw_block = builder->Finish();
BlockContents contents;
contents.data = raw_block;
return contents;
};
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = 8;
BlockCreateContext with_checksum_create_context{
&tbo,
nullptr /* statistics */,
false /* using_zstd */,
protection_bytes_per_key,
options.comparator,
true /* index_value_is_full */};
BlockCreateContext create_context{
&tbo, nullptr /* statistics */, false /* using_zstd */,
0, options.comparator, true /* index_value_is_full */};
{
std::unique_ptr<Block_kData> data_block;
create_context.Create(&data_block, generate_block_content());
size_t block_memory = data_block->ApproximateMemoryUsage();
std::unique_ptr<Block_kData> with_checksum_data_block;
with_checksum_create_context.Create(&with_checksum_data_block,
generate_block_content());
ASSERT_GT(with_checksum_data_block->ApproximateMemoryUsage() - block_memory,
100);
}
{
std::unique_ptr<Block_kData> meta_block;
create_context.Create(&meta_block, generate_block_content());
size_t block_memory = meta_block->ApproximateMemoryUsage();
std::unique_ptr<Block_kData> with_checksum_meta_block;
with_checksum_create_context.Create(&with_checksum_meta_block,
generate_block_content());
// Rough comparison to avoid flaky test due to memory allocation alignment.
ASSERT_GT(with_checksum_meta_block->ApproximateMemoryUsage() - block_memory,
100);
}
{
// Index block has different contents.
std::vector<std::string> separators;
std::vector<BlockHandle> block_handles;
std::vector<std::string> first_keys;
GenerateRandomIndexEntries(&separators, &block_handles, &first_keys,
kNumRecords);
auto generate_index_content = [&]() {
builder = std::make_unique<BlockBuilder>(16 /* restart_interval */);
BlockHandle last_encoded_handle;
for (int i = 0; i < kNumRecords; ++i) {
IndexValue entry(block_handles[i], first_keys[i]);
std::string encoded_entry;
std::string delta_encoded_entry;
entry.EncodeTo(&encoded_entry, false, nullptr);
last_encoded_handle = entry.handle;
const Slice delta_encoded_entry_slice(delta_encoded_entry);
builder->Add(separators[i], encoded_entry, &delta_encoded_entry_slice);
}
Slice raw_block = builder->Finish();
BlockContents contents;
contents.data = raw_block;
return contents;
};
std::unique_ptr<Block_kIndex> index_block;
create_context.Create(&index_block, generate_index_content());
size_t block_memory = index_block->ApproximateMemoryUsage();
std::unique_ptr<Block_kIndex> with_checksum_index_block;
with_checksum_create_context.Create(&with_checksum_index_block,
generate_index_content());
ASSERT_GT(
with_checksum_index_block->ApproximateMemoryUsage() - block_memory,
100);
}
}
std::string GetDataBlockIndexTypeStr(
BlockBasedTableOptions::DataBlockIndexType t) {
return t == BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch
? "BinarySearch"
: "BinaryAndHash";
}
class DataBlockKVChecksumTest
: public BlockPerKVChecksumTest,
public testing::WithParamInterface<std::tuple<
BlockBasedTableOptions::DataBlockIndexType,
uint8_t /* block_protection_bytes_per_key */,
uint32_t /* restart_interval*/, bool /* use_delta_encoding */>> {
public:
DataBlockKVChecksumTest() = default;
BlockBasedTableOptions::DataBlockIndexType GetDataBlockIndexType() const {
return std::get<0>(GetParam());
}
uint8_t GetChecksumLen() const { return std::get<1>(GetParam()); }
uint32_t GetRestartInterval() const { return std::get<2>(GetParam()); }
bool GetUseDeltaEncoding() const { return std::get<3>(GetParam()); }
std::unique_ptr<Block_kData> GenerateDataBlock(
std::vector<std::string> &keys, std::vector<std::string> &values,
int num_record) {
BlockBasedTableOptions tbo;
BlockCreateContext create_context{&tbo, nullptr /* statistics */,
false /* using_zstd */, GetChecksumLen(),
Options().comparator};
builder_ = std::make_unique<BlockBuilder>(
static_cast<int>(GetRestartInterval()),
GetUseDeltaEncoding() /* use_delta_encoding */,
false /* use_value_delta_encoding */, GetDataBlockIndexType());
for (int i = 0; i < num_record; i++) {
builder_->Add(keys[i], values[i]);
}
Slice raw_block = builder_->Finish();
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kData> data_block;
create_context.Create(&data_block, std::move(contents));
return data_block;
}
std::unique_ptr<BlockBuilder> builder_;
};
INSTANTIATE_TEST_CASE_P(
P, DataBlockKVChecksumTest,
::testing::Combine(
::testing::Values(
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch,
BlockBasedTableOptions::DataBlockIndexType::
kDataBlockBinaryAndHash),
::testing::Values(0, 1, 2, 4, 8) /* protection_bytes_per_key */,
::testing::Values(1, 2, 3, 8, 16) /* restart_interval */,
::testing::Values(false, true)) /* delta_encoding */,
[](const testing::TestParamInfo<std::tuple<
BlockBasedTableOptions::DataBlockIndexType, uint8_t, uint32_t, bool>>
&args) {
std::ostringstream oss;
oss << GetDataBlockIndexTypeStr(std::get<0>(args.param))
<< "ProtectionPerKey" << std::to_string(std::get<1>(args.param))
<< "RestartInterval" << std::to_string(std::get<2>(args.param))
<< "DeltaEncode" << std::to_string(std::get<3>(args.param));
return oss.str();
});
TEST_P(DataBlockKVChecksumTest, ChecksumConstructionAndVerification) {
uint8_t protection_bytes_per_key = GetChecksumLen();
std::vector<int> num_restart_intervals = {1, 16};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords =
num_restart_interval * static_cast<int>(GetRestartInterval());
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0, kNumRecords + 1, 1 /* step */,
24 /* padding_size */);
SyncPoint::GetInstance()->DisableProcessing();
std::unique_ptr<Block_kData> data_block =
GenerateDataBlock(keys, values, kNumRecords);
const char *checksum_ptr = data_block->TEST_GetKVChecksum();
// Check checksum of correct length is generated
for (int i = 0; i < kNumRecords; i++) {
ASSERT_TRUE(VerifyChecksum(protection_bytes_per_key,
checksum_ptr + i * protection_bytes_per_key,
keys[i], values[i]));
}
std::vector<SequenceNumber> seqnos{kDisableGlobalSequenceNumber, 0};
// Could just use a boolean flag. Use a counter here just to keep open the
// possibility of checking the exact number of verifications in the future.
size_t verification_count = 0;
// The SyncPoint is placed before checking checksum_len == 0 in
// Block::VerifyChecksum(). So verification count is incremented even with
// protection_bytes_per_key = 0. No actual checksum computation is done in
// that case (see Block::VerifyChecksum()).
SyncPoint::GetInstance()->SetCallBack(
"Block::VerifyChecksum::checksum_len",
[&verification_count, protection_bytes_per_key](void *checksum_len) {
ASSERT_EQ((*static_cast<uint8_t *>(checksum_len)),
protection_bytes_per_key);
++verification_count;
});
SyncPoint::GetInstance()->EnableProcessing();
for (const auto seqno : seqnos) {
std::unique_ptr<DataBlockIter> biter{
data_block->NewDataIterator(Options().comparator, seqno)};
// SeekForGet() some key that does not exist
biter->SeekForGet(keys[kNumRecords]);
TestIterateForward(biter, verification_count);
verification_count = 0;
biter->SeekForGet(keys[kNumRecords / 2]);
ASSERT_GE(verification_count, 1);
TestIterateForward(biter, verification_count);
TestSeekToFirst(biter, verification_count);
TestSeekToLast(biter, verification_count);
TestSeekForPrev(biter, verification_count, keys[kNumRecords / 2]);
TestSeek(biter, verification_count, keys[kNumRecords / 2]);
}
}
}
class IndexBlockKVChecksumTest
: public BlockPerKVChecksumTest,
public testing::WithParamInterface<
std::tuple<BlockBasedTableOptions::DataBlockIndexType, uint8_t,
uint32_t, bool, bool>> {
public:
IndexBlockKVChecksumTest() = default;
BlockBasedTableOptions::DataBlockIndexType GetDataBlockIndexType() const {
return std::get<0>(GetParam());
}
uint8_t GetChecksumLen() const { return std::get<1>(GetParam()); }
uint32_t GetRestartInterval() const { return std::get<2>(GetParam()); }
bool UseValueDeltaEncoding() const { return std::get<3>(GetParam()); }
bool IncludeFirstKey() const { return std::get<4>(GetParam()); }
std::unique_ptr<Block_kIndex> GenerateIndexBlock(
std::vector<std::string> &separators,
std::vector<BlockHandle> &block_handles,
std::vector<std::string> &first_keys, int num_record) {
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = GetChecksumLen();
BlockCreateContext create_context{
&tbo,
nullptr /* statistics */,
false /* _using_zstd */,
protection_bytes_per_key,
options.comparator,
!UseValueDeltaEncoding() /* value_is_full */,
IncludeFirstKey()};
builder_ = std::make_unique<BlockBuilder>(
static_cast<int>(GetRestartInterval()), true /* use_delta_encoding */,
UseValueDeltaEncoding() /* use_value_delta_encoding */,
GetDataBlockIndexType());
BlockHandle last_encoded_handle;
for (int i = 0; i < num_record; i++) {
IndexValue entry(block_handles[i], first_keys[i]);
std::string encoded_entry;
std::string delta_encoded_entry;
entry.EncodeTo(&encoded_entry, IncludeFirstKey(), nullptr);
if (UseValueDeltaEncoding() && i > 0) {
entry.EncodeTo(&delta_encoded_entry, IncludeFirstKey(),
&last_encoded_handle);
}
last_encoded_handle = entry.handle;
const Slice delta_encoded_entry_slice(delta_encoded_entry);
builder_->Add(separators[i], encoded_entry, &delta_encoded_entry_slice);
}
// read serialized contents of the block
Slice raw_block = builder_->Finish();
// create block reader
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kIndex> index_block;
create_context.Create(&index_block, std::move(contents));
return index_block;
}
std::unique_ptr<BlockBuilder> builder_;
};
INSTANTIATE_TEST_CASE_P(
P, IndexBlockKVChecksumTest,
::testing::Combine(
::testing::Values(
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch,
BlockBasedTableOptions::DataBlockIndexType::
kDataBlockBinaryAndHash),
::testing::Values(0, 1, 2, 4, 8), ::testing::Values(1, 3, 8, 16),
::testing::Values(true, false), ::testing::Values(true, false)),
[](const testing::TestParamInfo<
std::tuple<BlockBasedTableOptions::DataBlockIndexType, uint8_t,
uint32_t, bool, bool>> &args) {
std::ostringstream oss;
oss << GetDataBlockIndexTypeStr(std::get<0>(args.param)) << "ProtBytes"
<< std::to_string(std::get<1>(args.param)) << "RestartInterval"
<< std::to_string(std::get<2>(args.param)) << "ValueDeltaEncode"
<< std::to_string(std::get<3>(args.param)) << "IncludeFirstKey"
<< std::to_string(std::get<4>(args.param));
return oss.str();
});
TEST_P(IndexBlockKVChecksumTest, ChecksumConstructionAndVerification) {
Options options = Options();
uint8_t protection_bytes_per_key = GetChecksumLen();
std::vector<int> num_restart_intervals = {1, 16};
std::vector<SequenceNumber> seqnos{kDisableGlobalSequenceNumber, 10001};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords =
num_restart_interval * static_cast<int>(GetRestartInterval());
for (const auto seqno : seqnos) {
std::vector<std::string> separators;
std::vector<BlockHandle> block_handles;
std::vector<std::string> first_keys;
GenerateRandomIndexEntries(&separators, &block_handles, &first_keys,
kNumRecords, 0 /* ts_sz */,
seqno != kDisableGlobalSequenceNumber);
SyncPoint::GetInstance()->DisableProcessing();
std::unique_ptr<Block_kIndex> index_block = GenerateIndexBlock(
separators, block_handles, first_keys, kNumRecords);
IndexBlockIter *kNullIter = nullptr;
Statistics *kNullStats = nullptr;
// read contents of block sequentially
std::unique_ptr<IndexBlockIter> biter{index_block->NewIndexIterator(
options.comparator, seqno, kNullIter, kNullStats,
true /* total_order_seek */, IncludeFirstKey() /* have_first_key */,
true /* key_includes_seq */,
!UseValueDeltaEncoding() /* value_is_full */,
true /* block_contents_pinned*/,
true /* user_defined_timestamps_persisted */,
nullptr /* prefix_index */)};
biter->SeekToFirst();
const char *checksum_ptr = index_block->TEST_GetKVChecksum();
// Check checksum of correct length is generated
for (int i = 0; i < kNumRecords; i++) {
// Obtaining the actual content written as value to index block is not
// trivial: delta-encoded value is only persisted when not at block
// restart point and that keys share some byte (see more in
// BlockBuilder::AddWithLastKeyImpl()). So here we just do verification
// using value from iterator unlike tests for DataBlockIter or
// MetaBlockIter.
ASSERT_TRUE(VerifyChecksum(protection_bytes_per_key, checksum_ptr,
biter->key(), biter->raw_value()));
}
size_t verification_count = 0;
// The SyncPoint is placed before checking checksum_len == 0 in
// Block::VerifyChecksum(). To make the testing code below simpler and not
// having to differentiate 0 vs non-0 checksum_len, we do an explicit
// assert checking on checksum_len here.
SyncPoint::GetInstance()->SetCallBack(
"Block::VerifyChecksum::checksum_len",
[&verification_count, protection_bytes_per_key](void *checksum_len) {
ASSERT_EQ((*static_cast<uint8_t *>(checksum_len)),
protection_bytes_per_key);
++verification_count;
});
SyncPoint::GetInstance()->EnableProcessing();
TestSeekToFirst(biter, verification_count);
TestSeekToLast(biter, verification_count);
TestSeek(biter, verification_count, first_keys[kNumRecords / 2]);
}
}
}
class MetaIndexBlockKVChecksumTest
: public BlockPerKVChecksumTest,
public testing::WithParamInterface<
uint8_t /* block_protection_bytes_per_key */> {
public:
MetaIndexBlockKVChecksumTest() = default;
uint8_t GetChecksumLen() const { return GetParam(); }
uint32_t GetRestartInterval() const { return 1; }
std::unique_ptr<Block_kMetaIndex> GenerateMetaIndexBlock(
std::vector<std::string> &keys, std::vector<std::string> &values,
int num_record) {
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = GetChecksumLen();
BlockCreateContext create_context{
&tbo, nullptr /* statistics */, false /* using_zstd */,
protection_bytes_per_key, options.comparator};
builder_ =
std::make_unique<BlockBuilder>(static_cast<int>(GetRestartInterval()));
// add a bunch of records to a block
for (int i = 0; i < num_record; i++) {
builder_->Add(keys[i], values[i]);
}
Slice raw_block = builder_->Finish();
BlockContents contents;
contents.data = raw_block;
std::unique_ptr<Block_kMetaIndex> meta_block;
create_context.Create(&meta_block, std::move(contents));
return meta_block;
}
std::unique_ptr<BlockBuilder> builder_;
};
INSTANTIATE_TEST_CASE_P(P, MetaIndexBlockKVChecksumTest,
::testing::Values(0, 1, 2, 4, 8),
[](const testing::TestParamInfo<uint8_t> &args) {
std::ostringstream oss;
oss << "ProtBytes" << std::to_string(args.param);
return oss.str();
});
TEST_P(MetaIndexBlockKVChecksumTest, ChecksumConstructionAndVerification) {
Options options = Options();
BlockBasedTableOptions tbo;
uint8_t protection_bytes_per_key = GetChecksumLen();
BlockCreateContext create_context{
&tbo, nullptr /* statistics */, false /* using_zstd */,
protection_bytes_per_key, options.comparator};
std::vector<int> num_restart_intervals = {1, 16};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords = num_restart_interval * GetRestartInterval();
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0, kNumRecords + 1, 1 /* step */,
24 /* padding_size */);
SyncPoint::GetInstance()->DisableProcessing();
std::unique_ptr<Block_kMetaIndex> meta_block =
GenerateMetaIndexBlock(keys, values, kNumRecords);
const char *checksum_ptr = meta_block->TEST_GetKVChecksum();
// Check checksum of correct length is generated
for (int i = 0; i < kNumRecords; i++) {
ASSERT_TRUE(VerifyChecksum(protection_bytes_per_key,
checksum_ptr + i * protection_bytes_per_key,
keys[i], values[i]));
}
size_t verification_count = 0;
// The SyncPoint is placed before checking checksum_len == 0 in
// Block::VerifyChecksum(). To make the testing code below simpler and not
// having to differentiate 0 vs non-0 checksum_len, we do an explicit assert
// checking on checksum_len here.
SyncPoint::GetInstance()->SetCallBack(
"Block::VerifyChecksum::checksum_len",
[&verification_count, protection_bytes_per_key](void *checksum_len) {
ASSERT_EQ((*static_cast<uint8_t *>(checksum_len)),
protection_bytes_per_key);
++verification_count;
});
SyncPoint::GetInstance()->EnableProcessing();
// Check that block iterator does checksum verification
std::unique_ptr<MetaBlockIter> biter{
meta_block->NewMetaIterator(true /* block_contents_pinned */)};
TestSeekToFirst(biter, verification_count);
TestSeekToLast(biter, verification_count);
TestSeek(biter, verification_count, keys[kNumRecords / 2]);
TestSeekForPrev(biter, verification_count, keys[kNumRecords / 2]);
}
}
class DataBlockKVChecksumCorruptionTest : public DataBlockKVChecksumTest {
public:
DataBlockKVChecksumCorruptionTest() = default;
std::unique_ptr<DataBlockIter> GenerateDataBlockIter(
std::vector<std::string> &keys, std::vector<std::string> &values,
int num_record) {
// During Block construction, we may create block iter to initialize per kv
// checksum. Disable syncpoint that may be created for block iter methods.
SyncPoint::GetInstance()->DisableProcessing();
block_ = GenerateDataBlock(keys, values, num_record);
std::unique_ptr<DataBlockIter> biter{block_->NewDataIterator(
Options().comparator, kDisableGlobalSequenceNumber)};
SyncPoint::GetInstance()->EnableProcessing();
return biter;
}
protected:
std::unique_ptr<Block_kData> block_;
};
TEST_P(DataBlockKVChecksumCorruptionTest, CorruptEntry) {
std::vector<int> num_restart_intervals = {1, 3};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords =
num_restart_interval * static_cast<int>(GetRestartInterval());
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0, kNumRecords + 1, 1 /* step */,
24 /* padding_size */);
SyncPoint::GetInstance()->SetCallBack(
"BlockIter::UpdateKey::value", [](void *arg) {
char *value = static_cast<char *>(arg);
// values generated by GenerateRandomKVs are of length 100
++value[10];
});
// Purely for reducing the number of lines of code.
typedef std::unique_ptr<DataBlockIter> IterPtr;
typedef void(IterAPI)(IterPtr & iter, std::string &);
std::string seek_key = keys[kNumRecords / 2];
auto test_seek = [&](IterAPI iter_api) {
IterPtr biter = GenerateDataBlockIter(keys, values, kNumRecords);
ASSERT_OK(biter->status());
iter_api(biter, seek_key);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
test_seek([](IterPtr &iter, std::string &) { iter->SeekToFirst(); });
test_seek([](IterPtr &iter, std::string &) { iter->SeekToLast(); });
test_seek([](IterPtr &iter, std::string &k) { iter->Seek(k); });
test_seek([](IterPtr &iter, std::string &k) { iter->SeekForPrev(k); });
test_seek([](IterPtr &iter, std::string &k) { iter->SeekForGet(k); });
typedef void (DataBlockIter::*IterStepAPI)();
auto test_step = [&](IterStepAPI iter_api, std::string &k) {
IterPtr biter = GenerateDataBlockIter(keys, values, kNumRecords);
SyncPoint::GetInstance()->DisableProcessing();
biter->Seek(k);
ASSERT_TRUE(biter->Valid());
ASSERT_OK(biter->status());
SyncPoint::GetInstance()->EnableProcessing();
std::invoke(iter_api, biter);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
if (kNumRecords > 1) {
test_step(&DataBlockIter::Prev, seek_key);
test_step(&DataBlockIter::Next, seek_key);
}
}
}
INSTANTIATE_TEST_CASE_P(
P, DataBlockKVChecksumCorruptionTest,
::testing::Combine(
::testing::Values(
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch,
BlockBasedTableOptions::DataBlockIndexType::
kDataBlockBinaryAndHash),
::testing::Values(4, 8) /* block_protection_bytes_per_key */,
::testing::Values(1, 3, 8, 16) /* restart_interval */,
::testing::Values(false, true)),
[](const testing::TestParamInfo<std::tuple<
BlockBasedTableOptions::DataBlockIndexType, uint8_t, uint32_t, bool>>
&args) {
std::ostringstream oss;
oss << GetDataBlockIndexTypeStr(std::get<0>(args.param)) << "ProtBytes"
<< std::to_string(std::get<1>(args.param)) << "RestartInterval"
<< std::to_string(std::get<2>(args.param)) << "DeltaEncode"
<< std::to_string(std::get<3>(args.param));
return oss.str();
});
class IndexBlockKVChecksumCorruptionTest : public IndexBlockKVChecksumTest {
public:
IndexBlockKVChecksumCorruptionTest() = default;
std::unique_ptr<IndexBlockIter> GenerateIndexBlockIter(
std::vector<std::string> &separators,
std::vector<BlockHandle> &block_handles,
std::vector<std::string> &first_keys, int num_record,
SequenceNumber seqno) {
SyncPoint::GetInstance()->DisableProcessing();
block_ =
GenerateIndexBlock(separators, block_handles, first_keys, num_record);
std::unique_ptr<IndexBlockIter> biter{block_->NewIndexIterator(
Options().comparator, seqno, nullptr, nullptr,
true /* total_order_seek */, IncludeFirstKey() /* have_first_key */,
true /* key_includes_seq */,
!UseValueDeltaEncoding() /* value_is_full */,
true /* block_contents_pinned */,
true /* user_defined_timestamps_persisted */,
nullptr /* prefix_index */)};
SyncPoint::GetInstance()->EnableProcessing();
return biter;
}
protected:
std::unique_ptr<Block_kIndex> block_;
};
INSTANTIATE_TEST_CASE_P(
P, IndexBlockKVChecksumCorruptionTest,
::testing::Combine(
::testing::Values(
BlockBasedTableOptions::DataBlockIndexType::kDataBlockBinarySearch,
BlockBasedTableOptions::DataBlockIndexType::
kDataBlockBinaryAndHash),
::testing::Values(4, 8) /* block_protection_bytes_per_key */,
::testing::Values(1, 3, 8, 16) /* restart_interval */,
::testing::Values(true, false), ::testing::Values(true, false)),
[](const testing::TestParamInfo<
std::tuple<BlockBasedTableOptions::DataBlockIndexType, uint8_t,
uint32_t, bool, bool>> &args) {
std::ostringstream oss;
oss << GetDataBlockIndexTypeStr(std::get<0>(args.param)) << "ProtBytes"
<< std::to_string(std::get<1>(args.param)) << "RestartInterval"
<< std::to_string(std::get<2>(args.param)) << "ValueDeltaEncode"
<< std::to_string(std::get<3>(args.param)) << "IncludeFirstKey"
<< std::to_string(std::get<4>(args.param));
return oss.str();
});
TEST_P(IndexBlockKVChecksumCorruptionTest, CorruptEntry) {
std::vector<int> num_restart_intervals = {1, 3};
std::vector<SequenceNumber> seqnos{kDisableGlobalSequenceNumber, 10001};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords =
num_restart_interval * static_cast<int>(GetRestartInterval());
for (const auto seqno : seqnos) {
std::vector<std::string> separators;
std::vector<BlockHandle> block_handles;
std::vector<std::string> first_keys;
GenerateRandomIndexEntries(&separators, &block_handles, &first_keys,
kNumRecords, 0 /* ts_sz */,
seqno != kDisableGlobalSequenceNumber);
SyncPoint::GetInstance()->SetCallBack(
"BlockIter::UpdateKey::value", [](void *arg) {
char *value = static_cast<char *>(arg);
// value can be delta-encoded with different lengths, so we corrupt
// first bytes here to be safe
++value[0];
});
typedef std::unique_ptr<IndexBlockIter> IterPtr;
typedef void(IterAPI)(IterPtr & iter, std::string &);
std::string seek_key = first_keys[kNumRecords / 2];
auto test_seek = [&](IterAPI iter_api) {
std::unique_ptr<IndexBlockIter> biter = GenerateIndexBlockIter(
separators, block_handles, first_keys, kNumRecords, seqno);
ASSERT_OK(biter->status());
iter_api(biter, seek_key);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
test_seek([](IterPtr &iter, std::string &) { iter->SeekToFirst(); });
test_seek([](IterPtr &iter, std::string &) { iter->SeekToLast(); });
test_seek([](IterPtr &iter, std::string &k) { iter->Seek(k); });
typedef void (IndexBlockIter::*IterStepAPI)();
auto test_step = [&](IterStepAPI iter_api, std::string &k) {
std::unique_ptr<IndexBlockIter> biter = GenerateIndexBlockIter(
separators, block_handles, first_keys, kNumRecords, seqno);
SyncPoint::GetInstance()->DisableProcessing();
biter->Seek(k);
ASSERT_TRUE(biter->Valid());
ASSERT_OK(biter->status());
SyncPoint::GetInstance()->EnableProcessing();
std::invoke(iter_api, biter);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
if (kNumRecords > 1) {
test_step(&IndexBlockIter::Prev, seek_key);
test_step(&IndexBlockIter::Next, seek_key);
}
}
}
}
class MetaIndexBlockKVChecksumCorruptionTest
: public MetaIndexBlockKVChecksumTest {
public:
MetaIndexBlockKVChecksumCorruptionTest() = default;
std::unique_ptr<MetaBlockIter> GenerateMetaIndexBlockIter(
std::vector<std::string> &keys, std::vector<std::string> &values,
int num_record) {
SyncPoint::GetInstance()->DisableProcessing();
block_ = GenerateMetaIndexBlock(keys, values, num_record);
std::unique_ptr<MetaBlockIter> biter{
block_->NewMetaIterator(true /* block_contents_pinned */)};
SyncPoint::GetInstance()->EnableProcessing();
return biter;
}
protected:
std::unique_ptr<Block_kMetaIndex> block_;
};
INSTANTIATE_TEST_CASE_P(
P, MetaIndexBlockKVChecksumCorruptionTest,
::testing::Values(4, 8) /* block_protection_bytes_per_key */,
[](const testing::TestParamInfo<uint8_t> &args) {
std::ostringstream oss;
oss << "ProtBytes" << std::to_string(args.param);
return oss.str();
});
TEST_P(MetaIndexBlockKVChecksumCorruptionTest, CorruptEntry) {
Options options = Options();
std::vector<int> num_restart_intervals = {1, 3};
for (const auto num_restart_interval : num_restart_intervals) {
const int kNumRecords =
num_restart_interval * static_cast<int>(GetRestartInterval());
std::vector<std::string> keys;
std::vector<std::string> values;
GenerateRandomKVs(&keys, &values, 0, kNumRecords + 1, 1 /* step */,
24 /* padding_size */);
SyncPoint::GetInstance()->SetCallBack(
"BlockIter::UpdateKey::value", [](void *arg) {
char *value = static_cast<char *>(arg);
// values generated by GenerateRandomKVs are of length 100
++value[10];
});
typedef std::unique_ptr<MetaBlockIter> IterPtr;
typedef void(IterAPI)(IterPtr & iter, std::string &);
typedef void (MetaBlockIter::*IterStepAPI)();
std::string seek_key = keys[kNumRecords / 2];
auto test_seek = [&](IterAPI iter_api) {
IterPtr biter = GenerateMetaIndexBlockIter(keys, values, kNumRecords);
ASSERT_OK(biter->status());
iter_api(biter, seek_key);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
test_seek([](IterPtr &iter, std::string &) { iter->SeekToFirst(); });
test_seek([](IterPtr &iter, std::string &) { iter->SeekToLast(); });
test_seek([](IterPtr &iter, std::string &k) { iter->Seek(k); });
test_seek([](IterPtr &iter, std::string &k) { iter->SeekForPrev(k); });
auto test_step = [&](IterStepAPI iter_api, const std::string &k) {
IterPtr biter = GenerateMetaIndexBlockIter(keys, values, kNumRecords);
SyncPoint::GetInstance()->DisableProcessing();
biter->Seek(k);
ASSERT_TRUE(biter->Valid());
ASSERT_OK(biter->status());
SyncPoint::GetInstance()->EnableProcessing();
std::invoke(iter_api, biter);
ASSERT_FALSE(biter->Valid());
ASSERT_TRUE(biter->status().IsCorruption());
};
if (kNumRecords > 1) {
test_step(&MetaBlockIter::Prev, seek_key);
test_step(&MetaBlockIter::Next, seek_key);
}
}
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char **argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}