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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3434) ability to increment a counter without reading original value from storage
Date Wed, 12 Jan 2011 16:27:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12980779#action_12980779

Jonathan Gray commented on HBASE-3434:

I think it remains to be seen exactly where features implemented via coprocessors will live.
 Certainly there will be some open source home for them, I just think there's some aversion
to shipping with and managing a big set of contribs.

> 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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