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rocksdb/table/cuckoo_table_builder_test.cc
Andrew Kryczka 2391ef7214 Embed column family name in SST file 
Summary:
Added the column family name to the properties block. This property
is omitted only if the property is unavailable, such as when RepairDB()
writes SST files.

In a next diff, I will change RepairDB to use this new property for
deciding to which column family an existing SST file belongs. If this
property is missing, it will add it to the "unknown" column family (same
as its existing behavior).

Test Plan:
New unit test:

  $ ./db_table_properties_test --gtest_filter=DBTablePropertiesTest.GetColumnFamilyNameProperty

Reviewers: IslamAbdelRahman, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D55605
2016-04-06 23:10:32 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef ROCKSDB_LITE
#include <vector>
#include <string>
#include <map>
#include <utility>
#include "table/meta_blocks.h"
#include "table/cuckoo_table_builder.h"
#include "util/file_reader_writer.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
extern const uint64_t kCuckooTableMagicNumber;
namespace {
std::unordered_map<std::string, std::vector<uint64_t>> hash_map;
uint64_t GetSliceHash(const Slice& s, uint32_t index,
uint64_t max_num_buckets) {
return hash_map[s.ToString()][index];
}
} // namespace
class CuckooBuilderTest : public testing::Test {
public:
CuckooBuilderTest() {
env_ = Env::Default();
Options options;
options.allow_mmap_reads = true;
env_options_ = EnvOptions(options);
}
void CheckFileContents(const std::vector<std::string>& keys,
const std::vector<std::string>& values,
const std::vector<uint64_t>& expected_locations,
std::string expected_unused_bucket, uint64_t expected_table_size,
uint32_t expected_num_hash_func, bool expected_is_last_level,
uint32_t expected_cuckoo_block_size = 1) {
// Read file
unique_ptr<RandomAccessFile> read_file;
ASSERT_OK(env_->NewRandomAccessFile(fname, &read_file, env_options_));
uint64_t read_file_size;
ASSERT_OK(env_->GetFileSize(fname, &read_file_size));
// Assert Table Properties.
TableProperties* props = nullptr;
unique_ptr<RandomAccessFileReader> file_reader(
new RandomAccessFileReader(std::move(read_file)));
ASSERT_OK(ReadTableProperties(file_reader.get(), read_file_size,
kCuckooTableMagicNumber, env_, nullptr,
&props));
// Check unused bucket.
std::string unused_key = props->user_collected_properties[
CuckooTablePropertyNames::kEmptyKey];
ASSERT_EQ(expected_unused_bucket.substr(0,
props->fixed_key_len), unused_key);
uint32_t value_len_found =
*reinterpret_cast<const uint32_t*>(props->user_collected_properties[
CuckooTablePropertyNames::kValueLength].data());
ASSERT_EQ(values.empty() ? 0 : values[0].size(), value_len_found);
ASSERT_EQ(props->raw_value_size, values.size()*value_len_found);
const uint64_t table_size =
*reinterpret_cast<const uint64_t*>(props->user_collected_properties[
CuckooTablePropertyNames::kHashTableSize].data());
ASSERT_EQ(expected_table_size, table_size);
const uint32_t num_hash_func_found =
*reinterpret_cast<const uint32_t*>(props->user_collected_properties[
CuckooTablePropertyNames::kNumHashFunc].data());
ASSERT_EQ(expected_num_hash_func, num_hash_func_found);
const uint32_t cuckoo_block_size =
*reinterpret_cast<const uint32_t*>(props->user_collected_properties[
CuckooTablePropertyNames::kCuckooBlockSize].data());
ASSERT_EQ(expected_cuckoo_block_size, cuckoo_block_size);
const bool is_last_level_found =
*reinterpret_cast<const bool*>(props->user_collected_properties[
CuckooTablePropertyNames::kIsLastLevel].data());
ASSERT_EQ(expected_is_last_level, is_last_level_found);
ASSERT_EQ(props->num_entries, keys.size());
ASSERT_EQ(props->fixed_key_len, keys.empty() ? 0 : keys[0].size());
ASSERT_EQ(props->data_size, expected_unused_bucket.size() *
(expected_table_size + expected_cuckoo_block_size - 1));
ASSERT_EQ(props->raw_key_size, keys.size()*props->fixed_key_len);
ASSERT_EQ(props->column_family_id, 0);
ASSERT_EQ(props->column_family_name, kDefaultColumnFamilyName);
delete props;
// Check contents of the bucket.
std::vector<bool> keys_found(keys.size(), false);
size_t bucket_size = expected_unused_bucket.size();
for (uint32_t i = 0; i < table_size + cuckoo_block_size - 1; ++i) {
Slice read_slice;
ASSERT_OK(file_reader->Read(i * bucket_size, bucket_size, &read_slice,
nullptr));
size_t key_idx =
std::find(expected_locations.begin(), expected_locations.end(), i) -
expected_locations.begin();
if (key_idx == keys.size()) {
// i is not one of the expected locaitons. Empty bucket.
ASSERT_EQ(read_slice.compare(expected_unused_bucket), 0);
} else {
keys_found[key_idx] = true;
ASSERT_EQ(read_slice.compare(keys[key_idx] + values[key_idx]), 0);
}
}
for (auto key_found : keys_found) {
// Check that all keys wereReader found.
ASSERT_TRUE(key_found);
}
}
std::string GetInternalKey(Slice user_key, bool zero_seqno) {
IterKey ikey;
ikey.SetInternalKey(user_key, zero_seqno ? 0 : 1000, kTypeValue);
return ikey.GetKey().ToString();
}
uint64_t NextPowOf2(uint64_t num) {
uint64_t n = 2;
while (n <= num) {
n *= 2;
}
return n;
}
uint64_t GetExpectedTableSize(uint64_t num) {
return NextPowOf2(static_cast<uint64_t>(num / kHashTableRatio));
}
Env* env_;
EnvOptions env_options_;
std::string fname;
const double kHashTableRatio = 0.9;
};
TEST_F(CuckooBuilderTest, SuccessWithEmptyFile) {
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/EmptyFile";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, 4, 100,
BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
ASSERT_EQ(0UL, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
CheckFileContents({}, {}, {}, "", 2, 2, false);
}
TEST_F(CuckooBuilderTest, WriteSuccessNoCollisionFullKey) {
uint32_t num_hash_fun = 4;
std::vector<std::string> user_keys = {"key01", "key02", "key03", "key04"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1, 2, 3}},
{user_keys[1], {1, 2, 3, 4}},
{user_keys[2], {2, 3, 4, 5}},
{user_keys[3], {3, 4, 5, 6}}};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 2, 3};
std::vector<std::string> keys;
for (auto& user_key : user_keys) {
keys.push_back(GetInternalKey(user_key, false));
}
uint64_t expected_table_size = GetExpectedTableSize(keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/NoCollisionFullKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(keys[i]), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = GetInternalKey("key00", true);
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 2, false);
}
TEST_F(CuckooBuilderTest, WriteSuccessWithCollisionFullKey) {
uint32_t num_hash_fun = 4;
std::vector<std::string> user_keys = {"key01", "key02", "key03", "key04"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1, 2, 3}},
{user_keys[1], {0, 1, 2, 3}},
{user_keys[2], {0, 1, 2, 3}},
{user_keys[3], {0, 1, 2, 3}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 2, 3};
std::vector<std::string> keys;
for (auto& user_key : user_keys) {
keys.push_back(GetInternalKey(user_key, false));
}
uint64_t expected_table_size = GetExpectedTableSize(keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionFullKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(keys[i]), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = GetInternalKey("key00", true);
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 4, false);
}
TEST_F(CuckooBuilderTest, WriteSuccessWithCollisionAndCuckooBlock) {
uint32_t num_hash_fun = 4;
std::vector<std::string> user_keys = {"key01", "key02", "key03", "key04"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1, 2, 3}},
{user_keys[1], {0, 1, 2, 3}},
{user_keys[2], {0, 1, 2, 3}},
{user_keys[3], {0, 1, 2, 3}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 2, 3};
std::vector<std::string> keys;
for (auto& user_key : user_keys) {
keys.push_back(GetInternalKey(user_key, false));
}
uint64_t expected_table_size = GetExpectedTableSize(keys.size());
unique_ptr<WritableFile> writable_file;
uint32_t cuckoo_block_size = 2;
fname = test::TmpDir() + "/WithCollisionFullKey2";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(
file_writer.get(), kHashTableRatio, num_hash_fun, 100,
BytewiseComparator(), cuckoo_block_size, false, false, GetSliceHash,
0 /* column_family_id */, kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(keys[i]), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = GetInternalKey("key00", true);
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 3, false, cuckoo_block_size);
}
TEST_F(CuckooBuilderTest, WithCollisionPathFullKey) {
// Have two hash functions. Insert elements with overlapping hashes.
// Finally insert an element with hash value somewhere in the middle
// so that it displaces all the elements after that.
uint32_t num_hash_fun = 2;
std::vector<std::string> user_keys = {"key01", "key02", "key03",
"key04", "key05"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04", "v05"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1}},
{user_keys[1], {1, 2}},
{user_keys[2], {2, 3}},
{user_keys[3], {3, 4}},
{user_keys[4], {0, 2}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 3, 4, 2};
std::vector<std::string> keys;
for (auto& user_key : user_keys) {
keys.push_back(GetInternalKey(user_key, false));
}
uint64_t expected_table_size = GetExpectedTableSize(keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionPathFullKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(keys[i]), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = GetInternalKey("key00", true);
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 2, false);
}
TEST_F(CuckooBuilderTest, WithCollisionPathFullKeyAndCuckooBlock) {
uint32_t num_hash_fun = 2;
std::vector<std::string> user_keys = {"key01", "key02", "key03",
"key04", "key05"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04", "v05"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1}},
{user_keys[1], {1, 2}},
{user_keys[2], {3, 4}},
{user_keys[3], {4, 5}},
{user_keys[4], {0, 3}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {2, 1, 3, 4, 0};
std::vector<std::string> keys;
for (auto& user_key : user_keys) {
keys.push_back(GetInternalKey(user_key, false));
}
uint64_t expected_table_size = GetExpectedTableSize(keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionPathFullKeyAndCuckooBlock";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 2, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(keys[i]), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = GetInternalKey("key00", true);
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 2, false, 2);
}
TEST_F(CuckooBuilderTest, WriteSuccessNoCollisionUserKey) {
uint32_t num_hash_fun = 4;
std::vector<std::string> user_keys = {"key01", "key02", "key03", "key04"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1, 2, 3}},
{user_keys[1], {1, 2, 3, 4}},
{user_keys[2], {2, 3, 4, 5}},
{user_keys[3], {3, 4, 5, 6}}};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 2, 3};
uint64_t expected_table_size = GetExpectedTableSize(user_keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/NoCollisionUserKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(GetInternalKey(user_keys[i], true)), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = user_keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = "key00";
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(user_keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 2, true);
}
TEST_F(CuckooBuilderTest, WriteSuccessWithCollisionUserKey) {
uint32_t num_hash_fun = 4;
std::vector<std::string> user_keys = {"key01", "key02", "key03", "key04"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1, 2, 3}},
{user_keys[1], {0, 1, 2, 3}},
{user_keys[2], {0, 1, 2, 3}},
{user_keys[3], {0, 1, 2, 3}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 2, 3};
uint64_t expected_table_size = GetExpectedTableSize(user_keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionUserKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(GetInternalKey(user_keys[i], true)), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = user_keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = "key00";
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(user_keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 4, true);
}
TEST_F(CuckooBuilderTest, WithCollisionPathUserKey) {
uint32_t num_hash_fun = 2;
std::vector<std::string> user_keys = {"key01", "key02", "key03",
"key04", "key05"};
std::vector<std::string> values = {"v01", "v02", "v03", "v04", "v05"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1}},
{user_keys[1], {1, 2}},
{user_keys[2], {2, 3}},
{user_keys[3], {3, 4}},
{user_keys[4], {0, 2}},
};
hash_map = std::move(hm);
std::vector<uint64_t> expected_locations = {0, 1, 3, 4, 2};
uint64_t expected_table_size = GetExpectedTableSize(user_keys.size());
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionPathUserKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
2, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(GetInternalKey(user_keys[i], true)), Slice(values[i]));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
size_t bucket_size = user_keys[0].size() + values[0].size();
ASSERT_EQ(expected_table_size * bucket_size - 1, builder.FileSize());
ASSERT_OK(builder.Finish());
ASSERT_OK(file_writer->Close());
ASSERT_LE(expected_table_size * bucket_size, builder.FileSize());
std::string expected_unused_bucket = "key00";
expected_unused_bucket += std::string(values[0].size(), 'a');
CheckFileContents(user_keys, values, expected_locations,
expected_unused_bucket, expected_table_size, 2, true);
}
TEST_F(CuckooBuilderTest, FailWhenCollisionPathTooLong) {
// Have two hash functions. Insert elements with overlapping hashes.
// Finally try inserting an element with hash value somewhere in the middle
// and it should fail because the no. of elements to displace is too high.
uint32_t num_hash_fun = 2;
std::vector<std::string> user_keys = {"key01", "key02", "key03",
"key04", "key05"};
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{user_keys[0], {0, 1}},
{user_keys[1], {1, 2}},
{user_keys[2], {2, 3}},
{user_keys[3], {3, 4}},
{user_keys[4], {0, 1}},
};
hash_map = std::move(hm);
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/WithCollisionPathUserKey";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
2, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
for (uint32_t i = 0; i < user_keys.size(); i++) {
builder.Add(Slice(GetInternalKey(user_keys[i], false)), Slice("value"));
ASSERT_EQ(builder.NumEntries(), i + 1);
ASSERT_OK(builder.status());
}
ASSERT_TRUE(builder.Finish().IsNotSupported());
ASSERT_OK(file_writer->Close());
}
TEST_F(CuckooBuilderTest, FailWhenSameKeyInserted) {
// Need to have a temporary variable here as VS compiler does not currently
// support operator= with initializer_list as a parameter
std::unordered_map<std::string, std::vector<uint64_t>> hm = {
{"repeatedkey", {0, 1, 2, 3}}};
hash_map = std::move(hm);
uint32_t num_hash_fun = 4;
std::string user_key = "repeatedkey";
unique_ptr<WritableFile> writable_file;
fname = test::TmpDir() + "/FailWhenSameKeyInserted";
ASSERT_OK(env_->NewWritableFile(fname, &writable_file, env_options_));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(writable_file), EnvOptions()));
CuckooTableBuilder builder(file_writer.get(), kHashTableRatio, num_hash_fun,
100, BytewiseComparator(), 1, false, false,
GetSliceHash, 0 /* column_family_id */,
kDefaultColumnFamilyName);
ASSERT_OK(builder.status());
builder.Add(Slice(GetInternalKey(user_key, false)), Slice("value1"));
ASSERT_EQ(builder.NumEntries(), 1u);
ASSERT_OK(builder.status());
builder.Add(Slice(GetInternalKey(user_key, true)), Slice("value2"));
ASSERT_EQ(builder.NumEntries(), 2u);
ASSERT_OK(builder.status());
ASSERT_TRUE(builder.Finish().IsNotSupported());
ASSERT_OK(file_writer->Close());
}
} // namespace 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 Cuckoo table is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // ROCKSDB_LITE
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