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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10451) Enable back Tag compression on HFiles
Date Sat, 01 Feb 2014 09:10:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13888497#comment-13888497
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Anoop Sam John commented on HBASE-10451:
----------------------------------------

When the store file is being read, as part of reseek to a key if we find the if we have jumped
a given key we do a move previous. Incase of DBEs we have already decoded this KV and so tags
in that. Suppose this KV had some tags which are like not present in Dict already. So as part
of decode we read the actual tag from file buffer and adds an entry into Dict.  Now after
moving to previous we once again decode this kv and so tags in that and again will make a
duplicate entry into Dict (In next index). This makes the Dict structure totally gone.

> Enable back Tag compression on HFiles
> -------------------------------------
>
>                 Key: HBASE-10451
>                 URL: https://issues.apache.org/jira/browse/HBASE-10451
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 0.98.1
>
>
> HBASE-10443 disables tag compression on HFiles. This Jira is to fix the issues we have
found out in HBASE-10443 and enable it back.



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