fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
3.1 KiB
80 lines
3.1 KiB
// 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.
|
|
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
#include "rocksdb/status.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class Env;
|
|
class Logger;
|
|
|
|
// SstFileManager is used to track SST files in the DB and control there
|
|
// deletion rate.
|
|
// All SstFileManager public functions are thread-safe.
|
|
class SstFileManager {
|
|
public:
|
|
virtual ~SstFileManager() {}
|
|
|
|
// Update the maximum allowed space that should be used by RocksDB, if
|
|
// the total size of the SST files exceeds max_allowed_space, writes to
|
|
// RocksDB will fail.
|
|
//
|
|
// Setting max_allowed_space to 0 will disable this feature, maximum allowed
|
|
// space will be infinite (Default value).
|
|
//
|
|
// thread-safe.
|
|
virtual void SetMaxAllowedSpaceUsage(uint64_t max_allowed_space) = 0;
|
|
|
|
// Return true if the total size of SST files exceeded the maximum allowed
|
|
// space usage.
|
|
//
|
|
// thread-safe.
|
|
virtual bool IsMaxAllowedSpaceReached() = 0;
|
|
|
|
// Return the total size of all tracked files.
|
|
// thread-safe
|
|
virtual uint64_t GetTotalSize() = 0;
|
|
|
|
// Return a map containing all tracked files and there corresponding sizes.
|
|
// thread-safe
|
|
virtual std::unordered_map<std::string, uint64_t> GetTrackedFiles() = 0;
|
|
|
|
// Return delete rate limit in bytes per second.
|
|
// thread-safe
|
|
virtual int64_t GetDeleteRateBytesPerSecond() = 0;
|
|
};
|
|
|
|
// Create a new SstFileManager that can be shared among multiple RocksDB
|
|
// instances to track SST file and control there deletion rate.
|
|
//
|
|
// @param env: Pointer to Env object, please see "rocksdb/env.h".
|
|
// @param info_log: If not nullptr, info_log will be used to log errors.
|
|
//
|
|
// == Deletion rate limiting specific arguments ==
|
|
// @param trash_dir: Path to the directory where deleted files will be moved
|
|
// to be deleted in a background thread while applying rate limiting. If this
|
|
// directory dont exist, it will be created. This directory should not be
|
|
// used by any other process or any other SstFileManager, Set to "" to
|
|
// disable deletion rate limiting.
|
|
// @param rate_bytes_per_sec: How many bytes should be deleted per second, If
|
|
// this value is set to 1024 (1 Kb / sec) and we deleted a file of size 4 Kb
|
|
// in 1 second, we will wait for another 3 seconds before we delete other
|
|
// files, Set to 0 to disable deletion rate limiting.
|
|
// @param delete_exisitng_trash: If set to true, the newly created
|
|
// SstFileManager will delete files that already exist in trash_dir.
|
|
// @param status: If not nullptr, status will contain any errors that happened
|
|
// during creating the missing trash_dir or deleting existing files in trash.
|
|
extern SstFileManager* NewSstFileManager(
|
|
Env* env, std::shared_ptr<Logger> info_log = nullptr,
|
|
std::string trash_dir = "", int64_t rate_bytes_per_sec = 0,
|
|
bool delete_exisitng_trash = true, Status* status = nullptr);
|
|
|
|
} // namespace rocksdb
|
|
|