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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5945) Reduce buffer copies in IPC server response path
Date Tue, 19 Nov 2013 19:29:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13826844#comment-13826844
] 

Hudson commented on HBASE-5945:
-------------------------------

SUCCESS: Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #844 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/844/])
HBASE-5945 Reduce buffer copies in IPC server response path (stack: rev 1543458)
* /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/IPCUtil.java
* /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
* /hbase/trunk/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/ipc/MetricsHBaseServerSource.java
* /hbase/trunk/hbase-hadoop1-compat/src/main/java/org/apache/hadoop/hbase/ipc/MetricsHBaseServerSourceImpl.java
* /hbase/trunk/hbase-hadoop2-compat/src/main/java/org/apache/hadoop/hbase/ipc/MetricsHBaseServerSourceImpl.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/BufferChain.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/MetricsHBaseServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestBufferChain.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestIPC.java


> Reduce buffer copies in IPC server response path
> ------------------------------------------------
>
>                 Key: HBASE-5945
>                 URL: https://issues.apache.org/jira/browse/HBASE-5945
>             Project: HBase
>          Issue Type: Improvement
>          Components: IPC/RPC
>    Affects Versions: 0.95.2
>            Reporter: Todd Lipcon
>            Assignee: stack
>             Fix For: 0.96.1
>
>         Attachments: 5945-in-progress.2.1.patch, 5945-in-progress.2.patch, 5945-in-progress.patch,
5945v2.txt, 5945v4.txt, 5945v4.txt, 5945v5.txt, buffer-copies.txt, even-fewer-copies.txt,
hbase-5495.txt, with_patch.png, without_patch.png
>
>
> The new PB code is sloppy with buffers and makes several needless copies. This increases
GC time a lot. A few simple changes can cut this back down.



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