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https://issues.apache.org/jira/browse/HBASE-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851262#action_12851262
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Kay Kay commented on HBASE-57:
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| figure which RS had the most blocks local to it and assign the region there
if dfs.replication > 1 (say 3 , as advised) with N blocks , that would be
finding the RS with the most blocks among the (3 ^ N permutations) + damping to
take care of 'hot datanodes' as you had pointed out. It should be interesting !
> [hbase] Master should allocate regions to regionservers based upon data
> locality and rack awareness
> ---------------------------------------------------------------------------------------------------
>
> Key: HBASE-57
> URL: https://issues.apache.org/jira/browse/HBASE-57
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: master
> Affects Versions: 0.2.0
> Reporter: stack
>
> Currently, regions are assigned regionservers based off a basic loading
> attribute. A factor to include in the assignment calcuation is the location
> of the region in hdfs; i.e. servers hosting region replicas. If the cluster
> is such that regionservers are being run on the same nodes as those running
> hdfs, then ideally the regionserver for a particular region should be running
> on the same server as hosts a region replica.
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