[jira] Assigned: (HBASE-2649) Make use of storefile 'order' making certain decisions during merge sort

["Pranav Khaitan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pranav Khaitan reassigned HBASE-2649:
-------------------------------------

    Assignee: Pranav Khaitan

> Make use of storefile 'order' making certain decisions during merge sort
> ------------------------------------------------------------------------
>
>                 Key: HBASE-2649
>                 URL: https://issues.apache.org/jira/browse/HBASE-2649
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Pranav Khaitan
>             Fix For: 0.90.0
>
>
> When we merge sort results currently there is no regard for storefile order.  This issue is about exploiting store file order at certain junctures.  For example, if we have N KVs all of the same coordinates -- same r/f/q/type/ts -- then the one from the storefile that was made most recently should prevail.  Also, we might consider order when looking at deletes so our tombstones are less *tombstoney* in that they'll only apply to values that are in storefiles older than the one that carries the delete marker (this latter sounds hard but putting it out there anyways).

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