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Posted to commits@hbase.apache.org by la...@apache.org on 2016/11/01 19:27:53 UTC
[2/4] hbase git commit: New SteppingRegionSplitPolicy,
avoid too aggressive spread of regions for small tables.
New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables.
Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/e1eb914f
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/e1eb914f
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/e1eb914f
Branch: refs/heads/branch-1.3
Commit: e1eb914f21305ea0e2e8a784a187efd11d0d8ca0
Parents: c542c49
Author: Lars Hofhansl <la...@apache.org>
Authored: Tue Nov 1 12:21:27 2016 -0700
Committer: Lars Hofhansl <la...@apache.org>
Committed: Tue Nov 1 12:23:30 2016 -0700
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...IncreasingToUpperBoundRegionSplitPolicy.java | 4 +--
.../hbase/regionserver/SteppingSplitPolicy.java | 32 ++++++++++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hbase/blob/e1eb914f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java
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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 7144cb8..ff68110 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
@@ -45,7 +45,7 @@ import org.apache.hadoop.hbase.classification.InterfaceAudience;
public class IncreasingToUpperBoundRegionSplitPolicy extends ConstantSizeRegionSplitPolicy {
private static final Log LOG = LogFactory.getLog(IncreasingToUpperBoundRegionSplitPolicy.class);
- private long initialSize;
+ protected long initialSize;
@Override
protected void configureForRegion(HRegion region) {
@@ -116,7 +116,7 @@ public class IncreasingToUpperBoundRegionSplitPolicy extends ConstantSizeRegionS
}
/**
- * @return Region max size or {@code count of regions cubed * flushsize},
+ * @return Region max size or {@code count of regions cubed * 2 * flushsize},
* which ever is smaller; guard against there being zero regions on this server.
*/
protected long getSizeToCheck(final int tableRegionsCount) {
http://git-wip-us.apache.org/repos/asf/hbase/blob/e1eb914f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java
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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();
+ }
+
+
+}