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Date: Sat, 11 Feb 2012 23:22:59 +0000 (UTC)
From: "Zhihong Yu (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-3584) Allow atomic put/delete in one call
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    [ https://issues.apache.org/jira/browse/HBASE-3584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13206297#comment-13206297 ] 

Zhihong Yu commented on HBASE-3584:
-----------------------------------

I looked at 89-fb/src/main/java/org/apache/hadoop/hbase/client/RowMutation.java
It is not versioned. And write(DataOutput out) has:
{code}
    out.writeLong(RowMutation.globalOrderCounter.incrementAndGet());
{code}
The divergence is noticeable.
If RowMutation in 89-fb were versioned, we may be able to assign a higher version number to RowMutation in TRUNK.
But that's not pretty either.
                
> Allow atomic put/delete in one call
> -----------------------------------
>
>                 Key: HBASE-3584
>                 URL: https://issues.apache.org/jira/browse/HBASE-3584
>             Project: HBase
>          Issue Type: New Feature
>          Components: client, coprocessors, regionserver
>            Reporter: ryan rawson
>            Assignee: Lars Hofhansl
>             Fix For: 0.94.0
>
>         Attachments: 3584-final.txt, 3584-v1.txt, 3584-v3.txt
>
>
> Right now we have the following calls:
> put(Put)
> delete(Delete)
> increment(Increments)
> But we cannot combine all of the above in a single call, complete with a single row lock.  It would be nice to do that.
> It would also allow us to do a CAS where we could do a put/increment if the check succeeded.
> -----
> Amendment:
> Since Increment does not currently support MVCC it cannot be included in an atomic operation.
> So this for Put and Delete only.

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