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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13579) Avoid isCellTTLExpired() for NO-TAG cases
Date Wed, 06 May 2015 08:45:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14530156#comment-14530156
] 

Hudson commented on HBASE-13579:
--------------------------------

SUCCESS: Integrated in HBase-1.2 #61 (See [https://builds.apache.org/job/HBase-1.2/61/])
HBASE-13579 - Avoid isCellTTLExpired() for NO-TAG cases (Ram) (ramkrishna: rev 426c7eef09af0a4f306c6cc0f70f994b01f68ad6)
* hbase-common/src/main/java/org/apache/hadoop/hbase/NoTagsKeyValue.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV3.java


> Avoid isCellTTLExpired() for NO-TAG cases
> -----------------------------------------
>
>                 Key: HBASE-13579
>                 URL: https://issues.apache.org/jira/browse/HBASE-13579
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Scanners
>    Affects Versions: 1.0.0, 1.0.1
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0, 1.1.0, 0.98.14, 1.0.2, 1.2.0
>
>         Attachments: HBASE-13579_0.98.patch, HBASE-13579_0.98_1.patch, HBASE-13579_1.patch,
HBASE-13579_2.patch, HBASE-13579_KVExtension.patch, HBASE-13579_branch-1.patch, HBASE-13579_branch-1_1.patch,
HBASE-13579_storelevel.patch
>
>
> As observed in this JIRA's performance test, we are always calling the isCellTTLExpired()
for every cell and internally it is parsing the keyLength, valueLength() to get the tagsLength
after which we decide whether Cell level TTL is present are not.
> This JIRA aims to avoid this check if all the readers of the storescanner knows that
there are no tags to read.  Note that, for the memstore scanner we will do that in another
JIRA, which I suppose Stack had already raised to avoid tag length while flushing (for the
NO-TAG) case.



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