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Revision 926f3a78a64b327475ee6c60b6c8ab4f34253204 authored by Siying Dong on 09 July 2018, 22:17:38 UTC, committed by Facebook Github Bot on 09 July 2018, 22:28:12 UTC 
In delete scheduler, before ftruncate file for slow delete, check whether there is other hard links (#4093)
 
Summary:
Right now slow deletion with ftruncate doesn't work well with checkpoints because it ruin hard linked files in checkpoints. To fix it, check the file has no other hard link before ftruncate it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4093

Differential Revision: D8730360

Pulled By: siying

fbshipit-source-id: 756eea5bce8a87b9a2ea3a5bfa190b2cab6f75df
1 parent b984637
Raw File
persistent_cache_options.h 
//  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).
#pragma once

#include <string>

#include "monitoring/statistics.h"
#include "rocksdb/persistent_cache.h"

namespace rocksdb {

// PersistentCacheOptions
//
// This describe the caching behavior for page cache
// This is used to pass the context for caching and the cache handle
struct PersistentCacheOptions {
  PersistentCacheOptions() {}
  explicit PersistentCacheOptions(
      const std::shared_ptr<PersistentCache>& _persistent_cache,
      const std::string _key_prefix, Statistics* const _statistics)
      : persistent_cache(_persistent_cache),
        key_prefix(_key_prefix),
        statistics(_statistics) {}

  virtual ~PersistentCacheOptions() {}

  std::shared_ptr<PersistentCache> persistent_cache;
  std::string key_prefix;
  Statistics* statistics = nullptr;
};

}  // namespace rocksdb
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