hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Zhihong Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5313) Restructure hfiles layout for better compression
Date Sat, 11 Feb 2012 02:12:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205978#comment-13205978
] 

Zhihong Yu commented on HBASE-5313:
-----------------------------------

There're only two weeks before we branch 0.94
I think HFile v3 would be in 0.96, containing this feature and HBASE-5347.
                
> Restructure hfiles layout for better compression
> ------------------------------------------------
>
>                 Key: HBASE-5313
>                 URL: https://issues.apache.org/jira/browse/HBASE-5313
>             Project: HBase
>          Issue Type: Improvement
>          Components: io
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>
> A HFile block contain a stream of key-values. Can we can organize these kvs on the disk
in a better way so that we get much greater compression ratios?
> One option (thanks Prakash) is to store all the keys in the beginning of the block (let's
call this the key-section) and then store all their corresponding values towards the end of
the block. This will allow us to not-even decompress the values when we are scanning and skipping
over rows in the block.
> Any other ideas? 

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message