/usr/include/rocksdb/utilities/flashcache.h is in librocksdb-dev 4.5.1-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | // Copyright (c) 2014, 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.
#pragma once
#include <string>
#include "rocksdb/env.h"
namespace rocksdb {
// This API is experimental. We will mark it stable once we run it in production
// for a while.
// NewFlashcacheAwareEnv() creates and Env that blacklists all background
// threads (used for flush and compaction) from using flashcache to cache their
// reads. Reads from compaction thread don't need to be cached because they are
// going to be soon made obsolete (due to nature of compaction)
// Usually you would pass Env::Default() as base.
// cachedev_fd is a file descriptor of the flashcache device. Caller has to
// open flashcache device before calling this API.
extern std::unique_ptr<Env> NewFlashcacheAwareEnv(
Env* base, const int cachedev_fd);
} // namespace rocksdb
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