diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java index 7fbb73f..79b740c 100644 --- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java @@ -43,7 +43,7 @@ public class IncreasingToUpperBoundRegionSplitPolicy extends ConstantSizeRegionSplitPolicy { static final Log LOG = LogFactory.getLog(IncreasingToUpperBoundRegionSplitPolicy.class); - private long initialSize; + protected long initialSize; @Override protected void configureForRegion(HRegion region) { @@ -93,7 +93,7 @@ extends ConstantSizeRegionSplitPolicy { } /** - * @return Region max size or count of regions squared * flushsize, which ever is + * @return Region max size or count of regions cubed * flushsize * 2, which ever is * smaller; guard against there being zero regions on this server. */ protected long getSizeToCheck(final int tableRegionsCount) { diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java new file mode 100644 index 0000000..4f3e0f2 --- /dev/null +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java @@ -0,0 +1,32 @@ +/** + * 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; + +public class SteppingSplitPolicy extends IncreasingToUpperBoundRegionSplitPolicy { + /** + * @return flushSize * 2 if there's exactly one region of the table in question + * found on this regionserver. Otherwise max file size. + * This allows a table to spread quickly across servers, while avoiding creating + * too many regions. + */ + protected long getSizeToCheck(final int tableRegionsCount) { + return tableRegionsCount == 1 ? this.initialSize : getDesiredMaxFileSize(); + } + + +}