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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13579) Avoid isCellTTLExpired() for NO-TAG cases
Date Tue, 12 May 2015 10:18:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14539622#comment-14539622
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Anoop Sam John commented on HBASE-13579:
----------------------------------------

[~ram_krish] This is already committed to branch1.1 right?  So this is already there in 1.1.0
.  FYI [~ndimiduk]
If 0.98 commit is taking time, better we close it and open a backport Jira for 0.98?  

> 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, 0.98.14, 1.0.2, 1.2.0, 1.1.1
>
>         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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