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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10835) DBE encode path improvements
Date Thu, 27 Mar 2014 10:27:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13949124#comment-13949124
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Anoop Sam John commented on HBASE-10835:
----------------------------------------

Thought the change in write path will be bigger and it is not so cell specific so handle in
a seperate jira.  HBASE-10801 , therea are suggestions on the read path.

> DBE encode path improvements
> ----------------------------
>
>                 Key: HBASE-10835
>                 URL: https://issues.apache.org/jira/browse/HBASE-10835
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 0.99.0
>
>
> Here 1st we write KVs (Cells) into a buffer and then passed to DBE encoder. Encoder again
reads kvs one by one from the buffer and encodes and creates a new buffer.
> There is no need to have this model now. Previously we had option of no encode in disk
and encode only in cache. At that time the read buffer from a HFile block was passed to this
and encodes.
> So encode cell by cell can be done now. Making this change will need us to have a NoOp
DBE impl which just do the write of a cell as it is with out any encoding.



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