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From "Alex Newman (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-11715) HBase should provide a tool to compare 2 remote tables.
Date Sun, 10 Aug 2014 20:53:12 GMT

     [ https://issues.apache.org/jira/browse/HBASE-11715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alex Newman updated HBASE-11715:
--------------------------------

    Issue Type: New Feature  (was: Bug)

> HBase should provide a tool to compare 2 remote tables.
> -------------------------------------------------------
>
>                 Key: HBASE-11715
>                 URL: https://issues.apache.org/jira/browse/HBASE-11715
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Jean-Marc Spaggiari
>
> As discussed in the mailing list, when a table is copied to another cluster and need
to be validated against the first one, only VerifyReplication can be used. However, this can
be very long since data need to be copied again.
> We should provide an easier and faster way to compare the tables. 
> One option is to calculate hashs per ranges. User can define number of buckets, then
we split the table into this number of buckets and calculate an hash for each (Like partitioner
is already doing). We can also optionally calculate an overall CRC to reduce even more hash
collision. 



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