001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.regionserver; 019 020import java.util.Collection; 021import java.util.HashSet; 022import org.apache.hadoop.hbase.HBaseInterfaceAudience; 023import org.apache.yetus.audience.InterfaceAudience; 024 025/** 026 * A {@link FlushPolicy} that only flushes store larger than a given threshold. If no store is large 027 * enough, then all stores will be flushed. Gives priority to selecting regular stores first, and 028 * only if no other option, selects sloppy stores which normaly require more memory. 029 */ 030@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) 031public class FlushNonSloppyStoresFirstPolicy extends FlushLargeStoresPolicy { 032 033 private Collection<HStore> regularStores = new HashSet<>(); 034 private Collection<HStore> sloppyStores = new HashSet<>(); 035 036 /** Returns the stores need to be flushed. */ 037 @Override 038 public Collection<HStore> selectStoresToFlush() { 039 Collection<HStore> specificStoresToFlush = new HashSet<>(); 040 for (HStore store : regularStores) { 041 if (shouldFlush(store) || region.shouldFlushStore(store)) { 042 specificStoresToFlush.add(store); 043 } 044 } 045 if (!specificStoresToFlush.isEmpty()) { 046 return specificStoresToFlush; 047 } 048 for (HStore store : sloppyStores) { 049 if (shouldFlush(store)) { 050 specificStoresToFlush.add(store); 051 } 052 } 053 if (!specificStoresToFlush.isEmpty()) { 054 return specificStoresToFlush; 055 } 056 return region.stores.values(); 057 } 058 059 @Override 060 protected void configureForRegion(HRegion region) { 061 super.configureForRegion(region); 062 setFlushSizeLowerBounds(region); 063 for (HStore store : region.stores.values()) { 064 if (store.isSloppyMemStore()) { 065 sloppyStores.add(store); 066 } else { 067 regularStores.add(store); 068 } 069 } 070 } 071}