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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14020) Unsafe based optimized write in ByteBufferOutputStream
Date Mon, 06 Jul 2015 08:59:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14614713#comment-14614713
] 

Hudson commented on HBASE-14020:
--------------------------------

SUCCESS: Integrated in HBase-TRUNK #6629 (See [https://builds.apache.org/job/HBase-TRUNK/6629/])
HBASE-14020 Unsafe based optimized write in ByteBufferOutputStream. (anoopsamjohn: rev 7d3456d8fd027e252b1da7578e943f146626135d)
* hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java


> Unsafe based optimized write in ByteBufferOutputStream
> ------------------------------------------------------
>
>                 Key: HBASE-14020
>                 URL: https://issues.apache.org/jira/browse/HBASE-14020
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Scanners
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14020.patch, HBASE-14020_v2.patch, HBASE-14020_v3.patch, benchmark.zip
>
>
> We use this class to build the cellblock at RPC layer. The write operation is doing puts
to java ByteBuffer which is having lot of overhead. Instead we can do Unsafe based copy to
buffer operation.



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