You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "jiraposter@reviews.apache.org (Commented) (JIRA)" <ji...@apache.org> on 2012/04/02 16:23:23 UTC
[jira] [Commented] (HBASE-5625) Avoid byte buffer allocations when
reading a value from a Result object
[ https://issues.apache.org/jira/browse/HBASE-5625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244219#comment-13244219 ]
jiraposter@reviews.apache.org commented on HBASE-5625:
------------------------------------------------------
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/4607/
-----------------------------------------------------------
Review request for hbase.
Summary
-------
When calling Result.getValue(), an extra dummy KeyValue and its associated underlying byte array are allocated, as well as a persistent buffer that will contain the returned value.
These can be avoided by reusing a static array for the dummy object and by passing a ByteBuffer object as a value destination buffer to the read method.
This addresses bug HBASE-5625.
https://issues.apache.org/jira/browse/HBASE-5625
Diffs
-----
src/main/java/org/apache/hadoop/hbase/KeyValue.java 243d76f
src/main/java/org/apache/hadoop/hbase/client/Result.java df0b3ef
src/test/java/org/apache/hadoop/hbase/client/TestResult.java f9e29c2
Diff: https://reviews.apache.org/r/4607/diff
Testing
-------
Added value check to TestResult#testBasic and TestResult.testMultiVersion.
Thanks,
Tudor
> Avoid byte buffer allocations when reading a value from a Result object
> -----------------------------------------------------------------------
>
> Key: HBASE-5625
> URL: https://issues.apache.org/jira/browse/HBASE-5625
> Project: HBase
> Issue Type: Improvement
> Components: client
> Affects Versions: 0.92.1
> Reporter: Tudor Scurtu
> Assignee: Tudor Scurtu
> Labels: patch
> Attachments: 5625.txt, 5625v2.txt, 5625v3.txt, 5625v4.txt
>
>
> When calling Result.getValue(), an extra dummy KeyValue and its associated underlying byte array are allocated, as well as a persistent buffer that will contain the returned value.
> These can be avoided by reusing a static array for the dummy object and by passing a ByteBuffer object as a value destination buffer to the read method.
> The current functionality is maintained, and we have added a separate method call stack that employs the described changes. I will provide more details with the patch.
> Running tests with a profiler, the reduction of read time seems to be of up to 40%.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira