| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.hadoop.hbase.regionserver; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| |
| /** |
| * A {@link FlushPolicy} that only flushes store larger than a given threshold. If no store is large |
| * enough, then all stores will be flushed. |
| * Gives priority to selecting regular stores first, and only if no other |
| * option, selects sloppy stores which normaly require more memory. |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) |
| public class FlushNonSloppyStoresFirstPolicy extends FlushLargeStoresPolicy { |
| |
| private Collection<Store> regularStores = new HashSet<>(); |
| private Collection<Store> sloppyStores = new HashSet<>(); |
| |
| /** |
| * @return the stores need to be flushed. |
| */ |
| @Override public Collection<Store> selectStoresToFlush() { |
| Collection<Store> specificStoresToFlush = new HashSet<Store>(); |
| for(Store store : regularStores) { |
| if(shouldFlush(store) || region.shouldFlushStore(store)) { |
| specificStoresToFlush.add(store); |
| } |
| } |
| if(!specificStoresToFlush.isEmpty()) return specificStoresToFlush; |
| for(Store store : sloppyStores) { |
| if(shouldFlush(store)) { |
| specificStoresToFlush.add(store); |
| } |
| } |
| if(!specificStoresToFlush.isEmpty()) return specificStoresToFlush; |
| return region.stores.values(); |
| } |
| |
| @Override |
| protected void configureForRegion(HRegion region) { |
| super.configureForRegion(region); |
| this.flushSizeLowerBound = getFlushSizeLowerBound(region); |
| for(Store store : region.stores.values()) { |
| if(store.getMemStore().isSloppy()) { |
| sloppyStores.add(store); |
| } else { |
| regularStores.add(store); |
| } |
| } |
| } |
| } |