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dhruba borthakur commented on HBASE-4477:
-----------------------------------------
I ran all unit tests. All unit tests pass, except these:
TestDistributedLogSplitting, TestRollingRestart, TestHTablePool. And these
failures are not related to my patch.
Andrew: will you be able to review this patch, especially because it changes
the coprocessor interface?
> Ability for an application to store metadata into the transaction log
> ---------------------------------------------------------------------
>
> Key: HBASE-4477
> URL: https://issues.apache.org/jira/browse/HBASE-4477
> Project: HBase
> Issue Type: Improvement
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: coprocessorPut1.txt, hlogMetadata1.txt
>
>
> mySQL allows an application to store an arbitrary blob along with each
> transaction in its transaction logs. This JIRA is to have a similar feature
> request for HBASE.
> The use case is as follows: An application on one data center A stores a blob
> of data along with each transaction. A replication software picks up these
> blobs from the transaction logs in A and hands it to another instance of the
> same application running on a remote data center B. The application in B is
> responsible for applying this to the remote Hbase cluster (and also handle
> conflict resolution if any).
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