d755c62f92
Summary: This provides provides an implementation of PersistentCacheTier that is specialized for RAM. This tier does not persist data though. Why do we need this tier ? This is ideal as tier 0. This tier can host data that is too hot. Why can't we use Cache variants ? Yes you can use them instead. This tier can potentially outperform BlockCache in RAW mode by virtue of compression and compressed cache in block cache doesn't seem very popular. Potentially this tier can be modified to under stand the disadvantage of the tier below and retain data that the tier below is bad at handling (for example index and bloom data that is huge in size) Test Plan: Run unit tests added Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D57069
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#ifndef ROCKSDB_LITE
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#include "utilities/persistent_cache/persistent_cache_test.h"
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#include <functional>
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#include <memory>
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#include <thread>
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namespace rocksdb {
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// Volatile cache tests
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TEST_F(PersistentCacheTierTest, VolatileCacheInsert) {
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for (auto nthreads : {1, 5}) {
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for (auto max_keys : {10 * 1024, 1 * 1024 * 1024}) {
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cache_ = std::make_shared<VolatileCacheTier>();
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RunInsertTest(nthreads, max_keys);
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}
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}
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}
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TEST_F(PersistentCacheTierTest, VolatileCacheInsertWithEviction) {
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for (auto nthreads : {1, 5}) {
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for (auto max_keys : {1 * 1024 * 1024}) {
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cache_ = std::make_shared<VolatileCacheTier>(/*compressed=*/true,
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/*size=*/1 * 1024 * 1024);
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RunInsertTestWithEviction(nthreads, max_keys);
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}
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}
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}
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// test table with volatile page cache
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TEST_F(PersistentCacheDBTest, VolatileCacheTest) {
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RunTest(std::bind(&PersistentCacheDBTest::MakeVolatileCache, this));
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}
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} // namespace rocksdb
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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#else
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int main() { return 0; }
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#endif
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