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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14832) Ensure write paths work with ByteBufferedCells in case of compaction
Date Thu, 19 Nov 2015 12:48:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15013473#comment-15013473
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ramkrishna.s.vasudevan commented on HBASE-14832:
------------------------------------------------

One doubt - in case of DBEs the cell that we may get during compaction will be the DBE cell
right?  In which only the value part and tag part will be offheap and all others are onheap?
Just got this doubt suddenly?  In that case supporting Prefix Tree should be relatively simple.
Thoughts? [~anoopsamjohn]

> Ensure write paths work with ByteBufferedCells in case of compaction
> --------------------------------------------------------------------
>
>                 Key: HBASE-14832
>                 URL: https://issues.apache.org/jira/browse/HBASE-14832
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14832.patch
>
>
> Currently any cell coming out of offheap Bucketcache while compaction does a copy using
the getXXXArray() API since write path does not work with BBCells. This JIRA is aimed at changing
the write path to support BBCells so that this copy is avoided.



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