| // Copyright 2015 Cloudera, Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef KUDU_TABLET_TABLET_PEER_MM_OPS_H_ |
| #define KUDU_TABLET_TABLET_PEER_MM_OPS_H_ |
| |
| #include "kudu/tablet/maintenance_manager.h" |
| #include "kudu/tablet/tablet_peer.h" |
| #include "kudu/util/stopwatch.h" |
| |
| namespace kudu { |
| |
| class Histogram; |
| template<class T> |
| class AtomicGauge; |
| |
| namespace tablet { |
| |
| class FlushOpPerfImprovementPolicy { |
| public: |
| ~FlushOpPerfImprovementPolicy() {} |
| |
| // Sets the performance improvement based on the anchored ram if it's over the threshold, |
| // else it will set it based on how long it has been since the last flush. |
| static void SetPerfImprovementForFlush(MaintenanceOpStats* stats, |
| double elapsed_ms, bool is_empty); |
| |
| private: |
| FlushOpPerfImprovementPolicy() {} |
| }; |
| |
| // Maintenance op for MRS flush. Only one can happen at a time. |
| class FlushMRSOp : public MaintenanceOp { |
| public: |
| explicit FlushMRSOp(TabletPeer* tablet_peer) |
| : MaintenanceOp(StringPrintf("FlushMRSOp(%s)", tablet_peer->tablet()->tablet_id().c_str()), |
| MaintenanceOp::HIGH_IO_USAGE), |
| tablet_peer_(tablet_peer) { |
| time_since_flush_.start(); |
| } |
| |
| virtual void UpdateStats(MaintenanceOpStats* stats) OVERRIDE; |
| |
| virtual bool Prepare() OVERRIDE; |
| |
| virtual void Perform() OVERRIDE; |
| |
| virtual scoped_refptr<Histogram> DurationHistogram() const OVERRIDE; |
| |
| virtual scoped_refptr<AtomicGauge<uint32_t> > RunningGauge() const OVERRIDE; |
| |
| private: |
| // Lock protecting time_since_flush_. |
| mutable simple_spinlock lock_; |
| Stopwatch time_since_flush_; |
| |
| TabletPeer *const tablet_peer_; |
| }; |
| |
| // Maintenance op for DMS flush. |
| // Reports stats for all the DMS this tablet contains but only flushes one in Perform(). |
| class FlushDeltaMemStoresOp : public MaintenanceOp { |
| public: |
| explicit FlushDeltaMemStoresOp(TabletPeer* tablet_peer) |
| : MaintenanceOp(StringPrintf("FlushDeltaMemStoresOp(%s)", |
| tablet_peer->tablet()->tablet_id().c_str()), |
| MaintenanceOp::HIGH_IO_USAGE), |
| tablet_peer_(tablet_peer) { |
| time_since_flush_.start(); |
| } |
| |
| virtual void UpdateStats(MaintenanceOpStats* stats) OVERRIDE; |
| |
| virtual bool Prepare() OVERRIDE { |
| return true; |
| } |
| |
| virtual void Perform() OVERRIDE; |
| |
| virtual scoped_refptr<Histogram> DurationHistogram() const OVERRIDE; |
| |
| virtual scoped_refptr<AtomicGauge<uint32_t> > RunningGauge() const OVERRIDE; |
| |
| private: |
| // Lock protecting time_since_flush_ |
| mutable simple_spinlock lock_; |
| Stopwatch time_since_flush_; |
| |
| TabletPeer *const tablet_peer_; |
| }; |
| |
| // Maintenance task that runs log GC. Reports log retention that represents the amount of data |
| // that can be GC'd. |
| // |
| // Only one LogGC op can run at a time. |
| class LogGCOp : public MaintenanceOp { |
| public: |
| explicit LogGCOp(TabletPeer* tablet_peer); |
| |
| virtual void UpdateStats(MaintenanceOpStats* stats) OVERRIDE; |
| |
| virtual bool Prepare() OVERRIDE; |
| |
| virtual void Perform() OVERRIDE; |
| |
| virtual scoped_refptr<Histogram> DurationHistogram() const OVERRIDE; |
| |
| virtual scoped_refptr<AtomicGauge<uint32_t> > RunningGauge() const OVERRIDE; |
| |
| private: |
| TabletPeer *const tablet_peer_; |
| scoped_refptr<Histogram> log_gc_duration_; |
| scoped_refptr<AtomicGauge<uint32_t> > log_gc_running_; |
| mutable Semaphore sem_; |
| }; |
| |
| } // namespace tablet |
| } // namespace kudu |
| |
| #endif /* KUDU_TABLET_TABLET_PEER_MM_OPS_H_ */ |