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From "Billy Pearson (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-675) Report correct host a table split is assigned to for MR Jobs
Date Tue, 10 Jun 2008 00:35:45 GMT
Report correct host a table split is assigned to for MR Jobs
------------------------------------------------------------

                 Key: HBASE-675
                 URL: https://issues.apache.org/jira/browse/HBASE-675
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Billy Pearson
            Priority: Minor
             Fix For: 0.3.0


Currently we return a null String array to the MR framework to use a random node for MR job
assignment.

class: org.apache.hadoop.hbase.mapred.tableSplit
function getLocations()

We should be able to query the meta now for the current host name of the server hosting the
region in question.
This will help with scaling as there will be less cross server communication removing bandwidth
as a bottleneck.

The side effect of fixing this will help from overloading region servers with lots of MR clients
all pulling from the same region server while theres work local for them to do.



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