[jira] Updated: (HBASE-3082) For ICV gets, first look in MemStore before reading StoreFiles

["Jonathan Gray (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-3082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Gray updated HBASE-3082:
---------------------------------

    Attachment: HBASE-3082-FINAL.patch

Patch being committed.  This patch is from Prakash and reviewed/approved by Ryan.

I cleaned up some of the comments and lines >80 and also one minor change from patch up on RB.  I'm also working on HBASE-2946 right now and changed the getLastIncrement() method to support multiple columns rather than just one.

> For ICV gets, first look in MemStore before reading StoreFiles
> --------------------------------------------------------------
>
>                 Key: HBASE-3082
>                 URL: https://issues.apache.org/jira/browse/HBASE-3082
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Jonathan Gray
>            Assignee: Prakash Khemani
>         Attachments: HBASE-3082-FINAL.patch
>
>
> For incrementColumnValue operations, it is possible to check MemStore for the column being incremented without sacrificing correctness.  If the column is not found in MemStore, we would then have to do a normal Get that opens/checks all StoreFiles for the given Store.
> In practice, this makes increment operations significantly faster for recently/frequently incremented columns.

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