org.apache.hudi.org.apache.hadoop.hbase.regionserver.FlushNonSloppyStoresFirstPolicy Maven / Gradle / Ivy
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* 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.yetus.audience.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 regularStores = new HashSet<>();
private Collection sloppyStores = new HashSet<>();
/**
* @return the stores need to be flushed.
*/
@Override
public Collection selectStoresToFlush() {
Collection specificStoresToFlush = new HashSet<>();
for (HStore store : regularStores) {
if (shouldFlush(store) || region.shouldFlushStore(store)) {
specificStoresToFlush.add(store);
}
}
if (!specificStoresToFlush.isEmpty()) {
return specificStoresToFlush;
}
for (HStore 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);
setFlushSizeLowerBounds(region);
for (HStore store : region.stores.values()) {
if (store.isSloppyMemStore()) {
sloppyStores.add(store);
} else {
regularStores.add(store);
}
}
}
}