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85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
#pragma once
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#include <base/types.h>
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#include <Common/ZooKeeper/Types.h>
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#include <Common/ZooKeeper/ZooKeeper.h>
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#include <Common/randomSeed.h>
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#include <Common/Stopwatch.h>
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#include <Core/BackgroundSchedulePool.h>
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#include <thread>
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#include <map>
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#include <unordered_map>
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#include <pcg_random.hpp>
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namespace DB
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{
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class StorageReplicatedMergeTree;
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/** Removes obsolete data from a table of type ReplicatedMergeTree.
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*/
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class ReplicatedMergeTreeCleanupThread
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{
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public:
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explicit ReplicatedMergeTreeCleanupThread(StorageReplicatedMergeTree & storage_);
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void start() { task->activateAndSchedule(); }
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void wakeup() { task->schedule(); }
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void stop() { task->deactivate(); }
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void wakeupEarlierIfNeeded();
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private:
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StorageReplicatedMergeTree & storage;
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String log_name;
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Poco::Logger * log;
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BackgroundSchedulePool::TaskHolder task;
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pcg64 rng{randomSeed()};
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UInt64 sleep_ms;
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std::atomic<UInt64> prev_cleanup_timestamp_ms = 0;
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std::atomic<bool> is_running = false;
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AtomicStopwatch wakeup_check_timer;
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void run();
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/// Returns a number this is directly proportional to the number of cleaned up blocks
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Float32 iterate();
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/// Remove old records from ZooKeeper. Returns the number of removed logs
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size_t clearOldLogs();
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/// The replica is marked as "lost" if it is inactive and its log pointer
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/// is far behind and we are not going to keep logs for it.
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/// Lost replicas will use different strategy for repair.
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void markLostReplicas(const std::unordered_map<String, UInt32> & host_versions_lost_replicas,
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const std::unordered_map<String, String> & log_pointers_candidate_lost_replicas,
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size_t replicas_count, const zkutil::ZooKeeperPtr & zookeeper);
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using NodeCTimeAndVersionCache = std::map<String, std::pair<Int64, Int32>>;
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/// Remove old block hashes from ZooKeeper. This is done by the leader replica. Returns the number of removed blocks
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size_t clearOldBlocks(const String & blocks_dir_name, UInt64 window_seconds, UInt64 window_size, NodeCTimeAndVersionCache & cached_block_stats);
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/// Remove old mutations that are done from ZooKeeper. This is done by the leader replica. Returns the number of removed mutations
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size_t clearOldMutations();
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NodeCTimeAndVersionCache cached_block_stats_for_sync_inserts;
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NodeCTimeAndVersionCache cached_block_stats_for_async_inserts;
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struct NodeWithStat;
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/// Returns list of blocks (with their stat) sorted by ctime in descending order.
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void getBlocksSortedByTime(const String & blocks_dir_name, zkutil::ZooKeeper & zookeeper, std::vector<NodeWithStat> & timed_blocks, NodeCTimeAndVersionCache & cached_block_stats);
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/// TODO Removing old quorum/failed_parts
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};
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}
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