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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5674) add support in HBase to overwrite hbase timestamp to a version number during major compaction
Date Fri, 30 Mar 2012 05:48:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13242085#comment-13242085
] 

stack commented on HBASE-5674:
------------------------------

bq. I hope this can be done in open source hbase, and can be pluggable.

Can you do your research w/o requiring that your 'researchy' code be committed to core.  The
most of us working on hbase are trying to make it an hardcore production worthy platform.
 'Pluggable' and 'research', at least on first blush, sound like distractions from the project
objective.

But maybe the research aligns with where hbase is trying to go.  Whats your research on?

Thanks.
                
> add support in HBase to overwrite hbase timestamp to a version number during major compaction
> ---------------------------------------------------------------------------------------------
>
>                 Key: HBASE-5674
>                 URL: https://issues.apache.org/jira/browse/HBASE-5674
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>
> Right now, a millisecond-level timestamp is attached to every record. 
> In our case, we only need a version number (mostly it will be just zero etc). A millisecond
timestamp is too heavy to carry. We should add support to overwrite it to zero during major
compaction. 
> KVs before major compaction will remain using system timestamp. And this should be configurable,
so that we should not mess up if the hbase timestamp is specified by application.

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