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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3434) ability to increment a counter without reading original value from storage
Date Mon, 10 Jan 2011 20:06:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979727#action_12979727
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ryan rawson commented on HBASE-3434:
------------------------------------

can we layer this on top of the existing infrastructure, instead of
making fundamental changes to KeyValue and HFile?  Or if we must make
changes, let's do it in very minimal ways, eg: add 1 or 2 more types
to KV.


On Mon, Jan 10, 2011 at 11:58 AM, dhruba borthakur (JIRA)



> ability to increment a counter without reading original value from storage
> --------------------------------------------------------------------------
>
>                 Key: HBASE-3434
>                 URL: https://issues.apache.org/jira/browse/HBASE-3434
>             Project: HBase
>          Issue Type: Improvement
>          Components: client, regionserver
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>
> There are a bunch of applications that do read-modify-write operations on HBase constructs,
e.g  a counter; The counter value has to be read in from hdfs before it can be incremented.
 We have an application where the number of increments on a counter far outnumbers the number
of times the counter is used or read. For these type of applications, it will be very beneficial
to not have to read in the counter from disk before it can be incremented.

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