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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-10835) DBE encode path improvements
Date Fri, 16 May 2014 11:17:43 GMT

     [ https://issues.apache.org/jira/browse/HBASE-10835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anoop Sam John updated HBASE-10835:
-----------------------------------

    Attachment: HBASE-10835_V4.patch

Reattaching patch V4 for getting a QA run

> 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
>
>         Attachments: HBASE-10835.patch, HBASE-10835_V2.patch, HBASE-10835_V3.patch, HBASE-10835_V4.patch
>
>
> 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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