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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 "cache/compressed_secondary_cache.h"
#include <iterator>
#include <memory>
#include <tuple>
#include "memory/jemalloc_nodump_allocator.h"
#include "rocksdb/convenience.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
namespace ROCKSDB_NAMESPACE {
class CompressedSecondaryCacheTest : public testing::Test,
public Cache::CreateContext {
public:
CompressedSecondaryCacheTest() : fail_create_(false) {}
~CompressedSecondaryCacheTest() override = default;
protected:
class TestItem {
public:
TestItem(const char* buf, size_t size) : buf_(new char[size]), size_(size) {
memcpy(buf_.get(), buf, size);
}
~TestItem() = default;
char* Buf() { return buf_.get(); }
[[nodiscard]] size_t Size() const { return size_; }
private:
std::unique_ptr<char[]> buf_;
size_t size_;
};
static size_t SizeCallback(Cache::ObjectPtr obj) {
return static_cast<TestItem*>(obj)->Size();
}
static Status SaveToCallback(Cache::ObjectPtr from_obj, size_t from_offset,
size_t length, char* out) {
auto item = static_cast<TestItem*>(from_obj);
const char* buf = item->Buf();
EXPECT_EQ(length, item->Size());
EXPECT_EQ(from_offset, 0);
memcpy(out, buf, length);
return Status::OK();
}
static void DeletionCallback(Cache::ObjectPtr obj,
MemoryAllocator* /*alloc*/) {
delete static_cast<TestItem*>(obj);
obj = nullptr;
}
static Status SaveToCallbackFail(Cache::ObjectPtr /*obj*/, size_t /*offset*/,
size_t /*size*/, char* /*out*/) {
return Status::NotSupported();
}
static Status CreateCallback(const Slice& data, Cache::CreateContext* context,
MemoryAllocator* /*allocator*/,
Cache::ObjectPtr* out_obj, size_t* out_charge) {
auto t = static_cast<CompressedSecondaryCacheTest*>(context);
if (t->fail_create_) {
return Status::NotSupported();
}
*out_obj = new TestItem(data.data(), data.size());
*out_charge = data.size();
return Status::OK();
}
static constexpr Cache::CacheItemHelper kHelper{
CacheEntryRole::kMisc, &DeletionCallback, &SizeCallback, &SaveToCallback,
&CreateCallback};
static constexpr Cache::CacheItemHelper kHelperFail{
CacheEntryRole::kMisc, &DeletionCallback, &SizeCallback,
&SaveToCallbackFail, &CreateCallback};
void SetFailCreate(bool fail) { fail_create_ = fail; }
void BasicTestHelper(std::shared_ptr<SecondaryCache> sec_cache,
bool sec_cache_is_compressed) {
get_perf_context()->Reset();
bool is_in_sec_cache{true};
// Lookup an non-existent key.
std::unique_ptr<SecondaryCacheResultHandle> handle0 = sec_cache->Lookup(
"k0", &kHelper, this, true, /*advise_erase=*/true, is_in_sec_cache);
ASSERT_EQ(handle0, nullptr);
Random rnd(301);
// Insert and Lookup the item k1 for the first time.
std::string str1(rnd.RandomString(1000));
TestItem item1(str1.data(), str1.length());
// A dummy handle is inserted if the item is inserted for the first time.
ASSERT_OK(sec_cache->Insert("k1", &item1, &kHelper));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
std::unique_ptr<SecondaryCacheResultHandle> handle1_1 = sec_cache->Lookup(
"k1", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_EQ(handle1_1, nullptr);
// Insert and Lookup the item k1 for the second time and advise erasing it.
ASSERT_OK(sec_cache->Insert("k1", &item1, &kHelper));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 1);
std::unique_ptr<SecondaryCacheResultHandle> handle1_2 = sec_cache->Lookup(
"k1", &kHelper, this, true, /*advise_erase=*/true, is_in_sec_cache);
ASSERT_NE(handle1_2, nullptr);
ASSERT_FALSE(is_in_sec_cache);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
1000);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
1007);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
std::unique_ptr<TestItem> val1 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle1_2->Value()));
ASSERT_NE(val1, nullptr);
ASSERT_EQ(memcmp(val1->Buf(), item1.Buf(), item1.Size()), 0);
// Lookup the item k1 again.
std::unique_ptr<SecondaryCacheResultHandle> handle1_3 = sec_cache->Lookup(
"k1", &kHelper, this, true, /*advise_erase=*/true, is_in_sec_cache);
ASSERT_EQ(handle1_3, nullptr);
// Insert and Lookup the item k2.
std::string str2(rnd.RandomString(1000));
TestItem item2(str2.data(), str2.length());
ASSERT_OK(sec_cache->Insert("k2", &item2, &kHelper));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 2);
std::unique_ptr<SecondaryCacheResultHandle> handle2_1 = sec_cache->Lookup(
"k2", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_EQ(handle2_1, nullptr);
ASSERT_OK(sec_cache->Insert("k2", &item2, &kHelper));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 2);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
2000);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
2014);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
std::unique_ptr<SecondaryCacheResultHandle> handle2_2 = sec_cache->Lookup(
"k2", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_NE(handle2_2, nullptr);
std::unique_ptr<TestItem> val2 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2_2->Value()));
ASSERT_NE(val2, nullptr);
ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
std::vector<SecondaryCacheResultHandle*> handles = {handle1_2.get(),
handle2_2.get()};
sec_cache->WaitAll(handles);
sec_cache.reset();
}
void BasicTest(bool sec_cache_is_compressed, bool use_jemalloc) {
CompressedSecondaryCacheOptions opts;
opts.capacity = 2048;
opts.num_shard_bits = 0;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
opts.compression_type = CompressionType::kNoCompression;
sec_cache_is_compressed = false;
}
} else {
opts.compression_type = CompressionType::kNoCompression;
}
if (use_jemalloc) {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (s.ok()) {
opts.memory_allocator = allocator;
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
}
std::shared_ptr<SecondaryCache> sec_cache =
NewCompressedSecondaryCache(opts);
BasicTestHelper(sec_cache, sec_cache_is_compressed);
}
void FailsTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 1100;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> sec_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
// Insert and Lookup the first item.
Random rnd(301);
std::string str1(rnd.RandomString(1000));
TestItem item1(str1.data(), str1.length());
// Insert a dummy handle.
ASSERT_OK(sec_cache->Insert("k1", &item1, &kHelper));
// Insert k1.
ASSERT_OK(sec_cache->Insert("k1", &item1, &kHelper));
// Insert and Lookup the second item.
std::string str2(rnd.RandomString(200));
TestItem item2(str2.data(), str2.length());
// Insert a dummy handle, k1 is not evicted.
ASSERT_OK(sec_cache->Insert("k2", &item2, &kHelper));
bool is_in_sec_cache{false};
std::unique_ptr<SecondaryCacheResultHandle> handle1 = sec_cache->Lookup(
"k1", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_EQ(handle1, nullptr);
// Insert k2 and k1 is evicted.
ASSERT_OK(sec_cache->Insert("k2", &item2, &kHelper));
std::unique_ptr<SecondaryCacheResultHandle> handle2 = sec_cache->Lookup(
"k2", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_NE(handle2, nullptr);
std::unique_ptr<TestItem> val2 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2->Value()));
ASSERT_NE(val2, nullptr);
ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
// Insert k1 again and a dummy handle is inserted.
ASSERT_OK(sec_cache->Insert("k1", &item1, &kHelper));
std::unique_ptr<SecondaryCacheResultHandle> handle1_1 = sec_cache->Lookup(
"k1", &kHelper, this, true, /*advise_erase=*/false, is_in_sec_cache);
ASSERT_EQ(handle1_1, nullptr);
// Create Fails.
SetFailCreate(true);
std::unique_ptr<SecondaryCacheResultHandle> handle2_1 = sec_cache->Lookup(
"k2", &kHelper, this, true, /*advise_erase=*/true, is_in_sec_cache);
ASSERT_EQ(handle2_1, nullptr);
// Save Fails.
std::string str3 = rnd.RandomString(10);
TestItem item3(str3.data(), str3.length());
// The Status is OK because a dummy handle is inserted.
ASSERT_OK(sec_cache->Insert("k3", &item3, &kHelperFail));
ASSERT_NOK(sec_cache->Insert("k3", &item3, &kHelperFail));
sec_cache.reset();
}
void BasicIntegrationTest(bool sec_cache_is_compressed,
bool enable_custom_split_merge) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
sec_cache_is_compressed = false;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
secondary_cache_opts.enable_custom_split_merge = enable_custom_split_merge;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
LRUCacheOptions lru_cache_opts(
/*_capacity =*/1300, /*_num_shard_bits =*/0,
/*_strict_capacity_limit =*/false, /*_high_pri_pool_ratio =*/0.5,
/*_memory_allocator =*/nullptr, kDefaultToAdaptiveMutex,
kDefaultCacheMetadataChargePolicy, /*_low_pri_pool_ratio =*/0.0);
lru_cache_opts.secondary_cache = secondary_cache;
std::shared_ptr<Cache> cache = NewLRUCache(lru_cache_opts);
std::shared_ptr<Statistics> stats = CreateDBStatistics();
get_perf_context()->Reset();
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1_1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1_1, &kHelper, str1.length()));
std::string str2 = rnd.RandomString(1012);
auto item2_1 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert("k2", item2_1, &kHelper, str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
std::string str3 = rnd.RandomString(1024);
auto item3_1 = new TestItem(str3.data(), str3.length());
// After this Insert, primary cache contains k3 and secondary cache contains
// k1's dummy item and k2's dummy item.
ASSERT_OK(cache->Insert("k3", item3_1, &kHelper, str3.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 2);
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item, k2's dummy item, and k3's dummy item.
auto item1_2 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1_2, &kHelper, str1.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 3);
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's item, k2's dummy item, and k3's dummy item.
auto item2_2 = new TestItem(str2.data(), str2.length());
ASSERT_OK(cache->Insert("k2", item2_2, &kHelper, str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 1);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
str1.length());
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
1008);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
// After this Insert, primary cache contains k3 and secondary cache contains
// k1's item and k2's item.
auto item3_2 = new TestItem(str3.data(), str3.length());
ASSERT_OK(cache->Insert("k3", item3_2, &kHelper, str3.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 2);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
str1.length() + str2.length());
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
2027);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
Cache::Handle* handle;
handle = cache->Lookup("k3", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_NE(handle, nullptr);
auto val3 = static_cast<TestItem*>(cache->Value(handle));
ASSERT_NE(val3, nullptr);
ASSERT_EQ(memcmp(val3->Buf(), item3_2->Buf(), item3_2->Size()), 0);
cache->Release(handle);
// Lookup an non-existent key.
handle = cache->Lookup("k0", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_EQ(handle, nullptr);
// This Lookup should just insert a dummy handle in the primary cache
// and the k1 is still in the secondary cache.
handle = cache->Lookup("k1", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 1);
auto val1_1 = static_cast<TestItem*>(cache->Value(handle));
ASSERT_NE(val1_1, nullptr);
ASSERT_EQ(memcmp(val1_1->Buf(), str1.data(), str1.size()), 0);
cache->Release(handle);
// This Lookup should erase k1 from the secondary cache and insert
// it into primary cache; then k3 is demoted.
// k2 and k3 are in secondary cache.
handle = cache->Lookup("k1", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 3);
cache->Release(handle);
// k2 is still in secondary cache.
handle = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 2);
cache->Release(handle);
// Testing SetCapacity().
ASSERT_OK(secondary_cache->SetCapacity(0));
handle = cache->Lookup("k3", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_EQ(handle, nullptr);
ASSERT_OK(secondary_cache->SetCapacity(7000));
size_t capacity;
ASSERT_OK(secondary_cache->GetCapacity(capacity));
ASSERT_EQ(capacity, 7000);
auto item1_3 = new TestItem(str1.data(), str1.length());
// After this Insert, primary cache contains k1.
ASSERT_OK(cache->Insert("k1", item1_3, &kHelper, str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 3);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 4);
auto item2_3 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert("k2", item2_3, &kHelper, str1.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 4);
auto item1_4 = new TestItem(str1.data(), str1.length());
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item and k2's dummy item.
ASSERT_OK(cache->Insert("k1", item1_4, &kHelper, str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 5);
auto item2_4 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's real item and k2's dummy item.
ASSERT_OK(cache->Insert("k2", item2_4, &kHelper, str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 5);
// This Lookup should just insert a dummy handle in the primary cache
// and the k1 is still in the secondary cache.
handle = cache->Lookup("k1", &kHelper, this, Cache::Priority::LOW, true,
stats.get());
ASSERT_NE(handle, nullptr);
cache->Release(handle);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 3);
cache.reset();
secondary_cache.reset();
}
void BasicIntegrationFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
LRUCacheOptions opts(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, /*_high_pri_pool_ratio=*/0.5,
/*_memory_allocator=*/nullptr, kDefaultToAdaptiveMutex,
kDefaultCacheMetadataChargePolicy, /*_low_pri_pool_ratio=*/0.0);
opts.secondary_cache = secondary_cache;
std::shared_ptr<Cache> cache = NewLRUCache(opts);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = std::make_unique<TestItem>(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1.get(), &kHelper, str1.length()));
item1.release(); // Appease clang-analyze "potential memory leak"
Cache::Handle* handle;
handle = cache->Lookup("k2", nullptr, this, Cache::Priority::LOW, true);
ASSERT_EQ(handle, nullptr);
handle = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, false);
ASSERT_EQ(handle, nullptr);
cache.reset();
secondary_cache.reset();
}
void IntegrationSaveFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
LRUCacheOptions opts(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, /*_high_pri_pool_ratio=*/0.5,
/*_memory_allocator=*/nullptr, kDefaultToAdaptiveMutex,
kDefaultCacheMetadataChargePolicy, /*_low_pri_pool_ratio=*/0.0);
opts.secondary_cache = secondary_cache;
std::shared_ptr<Cache> cache = NewLRUCache(opts);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1, &kHelperFail, str1.length()));
std::string str2 = rnd.RandomString(1002);
auto item2 = new TestItem(str2.data(), str2.length());
// k1 should be demoted to the secondary cache.
ASSERT_OK(cache->Insert("k2", item2, &kHelperFail, str2.length()));
Cache::Handle* handle;
handle =
cache->Lookup("k2", &kHelperFail, this, Cache::Priority::LOW, true);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
// This lookup should fail, since k1 demotion would have failed.
handle =
cache->Lookup("k1", &kHelperFail, this, Cache::Priority::LOW, true);
ASSERT_EQ(handle, nullptr);
// Since k1 was not promoted, k2 should still be in cache.
handle =
cache->Lookup("k2", &kHelperFail, this, Cache::Priority::LOW, true);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
cache.reset();
secondary_cache.reset();
}
void IntegrationCreateFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
LRUCacheOptions opts(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, /*_high_pri_pool_ratio=*/0.5,
/*_memory_allocator=*/nullptr, kDefaultToAdaptiveMutex,
kDefaultCacheMetadataChargePolicy, /*_low_pri_pool_ratio=*/0.0);
opts.secondary_cache = secondary_cache;
std::shared_ptr<Cache> cache = NewLRUCache(opts);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1, &kHelper, str1.length()));
std::string str2 = rnd.RandomString(1002);
auto item2 = new TestItem(str2.data(), str2.length());
// k1 should be demoted to the secondary cache.
ASSERT_OK(cache->Insert("k2", item2, &kHelper, str2.length()));
Cache::Handle* handle;
SetFailCreate(true);
handle = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
// This lookup should fail, since k1 creation would have failed
handle = cache->Lookup("k1", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_EQ(handle, nullptr);
// Since k1 didn't get promoted, k2 should still be in cache
handle = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
cache.reset();
secondary_cache.reset();
}
void IntegrationFullCapacityTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
LRUCacheOptions opts(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, /*_high_pri_pool_ratio=*/0.5,
/*_memory_allocator=*/nullptr, kDefaultToAdaptiveMutex,
kDefaultCacheMetadataChargePolicy, /*_low_pri_pool_ratio=*/0.0);
opts.secondary_cache = secondary_cache;
std::shared_ptr<Cache> cache = NewLRUCache(opts);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1_1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1_1, &kHelper, str1.length()));
std::string str2 = rnd.RandomString(1002);
std::string str2_clone{str2};
auto item2 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert("k2", item2, &kHelper, str2.length()));
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item and k2's dummy item.
auto item1_2 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert("k1", item1_2, &kHelper, str1.length()));
auto item2_2 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's item and k2's dummy item.
ASSERT_OK(cache->Insert("k2", item2_2, &kHelper, str2.length()));
Cache::Handle* handle2;
handle2 = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_NE(handle2, nullptr);
cache->Release(handle2);
// k1 promotion should fail because cache is at capacity and
// strict_capacity_limit is true, but the lookup should still succeed.
// A k1's dummy item is inserted into primary cache.
Cache::Handle* handle1;
handle1 = cache->Lookup("k1", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_NE(handle1, nullptr);
cache->Release(handle1);
// Since k1 didn't get inserted, k2 should still be in cache
handle2 = cache->Lookup("k2", &kHelper, this, Cache::Priority::LOW, true);
ASSERT_NE(handle2, nullptr);
cache->Release(handle2);
cache.reset();
secondary_cache.reset();
}
void SplitValueIntoChunksTest() {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (!s.ok()) {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(1000, 0, true, 0.5, 0.0,
allocator);
Random rnd(301);
// 8500 = 8169 + 233 + 98, so there should be 3 chunks after split.
size_t str_size{8500};
std::string str = rnd.RandomString(static_cast<int>(str_size));
size_t charge{0};
CacheValueChunk* chunks_head =
sec_cache->SplitValueIntoChunks(str, kLZ4Compression, charge);
ASSERT_EQ(charge, str_size + 3 * (sizeof(CacheValueChunk) - 1));
CacheValueChunk* current_chunk = chunks_head;
ASSERT_EQ(current_chunk->size, 8192 - sizeof(CacheValueChunk) + 1);
current_chunk = current_chunk->next;
ASSERT_EQ(current_chunk->size, 256 - sizeof(CacheValueChunk) + 1);
current_chunk = current_chunk->next;
ASSERT_EQ(current_chunk->size, 98);
sec_cache->GetHelper(true)->del_cb(chunks_head, /*alloc*/ nullptr);
}
void MergeChunksIntoValueTest() {
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
Random rnd(301);
size_t size1{2048};
std::string str1 = rnd.RandomString(static_cast<int>(size1));
CacheValueChunk* current_chunk = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size1]);
CacheValueChunk* chunks_head = current_chunk;
memcpy(current_chunk->data, str1.data(), size1);
current_chunk->size = size1;
size_t size2{256};
std::string str2 = rnd.RandomString(static_cast<int>(size2));
current_chunk->next = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size2]);
current_chunk = current_chunk->next;
memcpy(current_chunk->data, str2.data(), size2);
current_chunk->size = size2;
size_t size3{31};
std::string str3 = rnd.RandomString(static_cast<int>(size3));
current_chunk->next = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size3]);
current_chunk = current_chunk->next;
memcpy(current_chunk->data, str3.data(), size3);
current_chunk->size = size3;
current_chunk->next = nullptr;
std::string str = str1 + str2 + str3;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(1000, 0, true, 0.5, 0.0);
size_t charge{0};
CacheAllocationPtr value =
sec_cache->MergeChunksIntoValue(chunks_head, charge);
ASSERT_EQ(charge, size1 + size2 + size3);
std::string value_str{value.get(), charge};
ASSERT_EQ(strcmp(value_str.data(), str.data()), 0);
while (chunks_head != nullptr) {
CacheValueChunk* tmp_chunk = chunks_head;
chunks_head = chunks_head->next;
tmp_chunk->Free();
}
}
void SplictValueAndMergeChunksTest() {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (!s.ok()) {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(1000, 0, true, 0.5, 0.0,
allocator);
Random rnd(301);
// 8500 = 8169 + 233 + 98, so there should be 3 chunks after split.
size_t str_size{8500};
std::string str = rnd.RandomString(static_cast<int>(str_size));
size_t charge{0};
CacheValueChunk* chunks_head =
sec_cache->SplitValueIntoChunks(str, kLZ4Compression, charge);
ASSERT_EQ(charge, str_size + 3 * (sizeof(CacheValueChunk) - 1));
CacheAllocationPtr value =
sec_cache->MergeChunksIntoValue(chunks_head, charge);
ASSERT_EQ(charge, str_size);
std::string value_str{value.get(), charge};
ASSERT_EQ(strcmp(value_str.data(), str.data()), 0);
sec_cache->GetHelper(true)->del_cb(chunks_head, /*alloc*/ nullptr);
}
private:
bool fail_create_;
};
class CompressedSecCacheTestWithCompressAndAllocatorParam
: public CompressedSecondaryCacheTest,
public ::testing::WithParamInterface<std::tuple<bool, bool>> {
public:
CompressedSecCacheTestWithCompressAndAllocatorParam() {
sec_cache_is_compressed_ = std::get<0>(GetParam());
use_jemalloc_ = std::get<1>(GetParam());
}
bool sec_cache_is_compressed_;
bool use_jemalloc_;
};
TEST_P(CompressedSecCacheTestWithCompressAndAllocatorParam, BasicTes) {
BasicTest(sec_cache_is_compressed_, use_jemalloc_);
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecCacheTestWithCompressAndAllocatorParam,
::testing::Combine(testing::Bool(), testing::Bool()));
class CompressedSecondaryCacheTestWithCompressionParam
: public CompressedSecondaryCacheTest,
public ::testing::WithParamInterface<bool> {
public:
CompressedSecondaryCacheTestWithCompressionParam() {
sec_cache_is_compressed_ = GetParam();
}
bool sec_cache_is_compressed_;
};
TEST_P(CompressedSecondaryCacheTestWithCompressionParam, BasicTestFromString) {
std::shared_ptr<SecondaryCache> sec_cache{nullptr};
std::string sec_cache_uri;
if (sec_cache_is_compressed_) {
if (LZ4_Supported()) {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kLZ4Compression;"
"compress_format_version=2";
} else {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression";
sec_cache_is_compressed_ = false;
}
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
} else {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression";
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
}
BasicTestHelper(sec_cache, sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
BasicTestFromStringWithSplit) {
std::shared_ptr<SecondaryCache> sec_cache{nullptr};
std::string sec_cache_uri;
if (sec_cache_is_compressed_) {
if (LZ4_Supported()) {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kLZ4Compression;"
"compress_format_version=2;enable_custom_split_merge=true";
} else {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression;"
"enable_custom_split_merge=true";
sec_cache_is_compressed_ = false;
}
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
} else {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression;"
"enable_custom_split_merge=true";
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
}
BasicTestHelper(sec_cache, sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam, FailsTest) {
FailsTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
BasicIntegrationFailTest) {
BasicIntegrationFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationSaveFailTest) {
IntegrationSaveFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationCreateFailTest) {
IntegrationCreateFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationFullCapacityTest) {
IntegrationFullCapacityTest(sec_cache_is_compressed_);
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecondaryCacheTestWithCompressionParam,
testing::Bool());
class CompressedSecCacheTestWithCompressAndSplitParam
: public CompressedSecondaryCacheTest,
public ::testing::WithParamInterface<std::tuple<bool, bool>> {
public:
CompressedSecCacheTestWithCompressAndSplitParam() {
sec_cache_is_compressed_ = std::get<0>(GetParam());
enable_custom_split_merge_ = std::get<1>(GetParam());
}
bool sec_cache_is_compressed_;
bool enable_custom_split_merge_;
};
TEST_P(CompressedSecCacheTestWithCompressAndSplitParam, BasicIntegrationTest) {
BasicIntegrationTest(sec_cache_is_compressed_, enable_custom_split_merge_);
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecCacheTestWithCompressAndSplitParam,
::testing::Combine(testing::Bool(), testing::Bool()));
TEST_F(CompressedSecondaryCacheTest, SplitValueIntoChunksTest) {
SplitValueIntoChunksTest();
}
TEST_F(CompressedSecondaryCacheTest, MergeChunksIntoValueTest) {
MergeChunksIntoValueTest();
}
TEST_F(CompressedSecondaryCacheTest, SplictValueAndMergeChunksTest) {
SplictValueAndMergeChunksTest();
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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