[jira] [Created] (HBASE-21014) Improve Stochastic Balancer to write HDFS favoured node hints for region primary blocks to avoid destroying data locality if needing to use HDFS Balancer

["Hari Sekhon (JIRA)" <ji...@apache.org>]

Hari Sekhon created HBASE-21014:
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             Summary: Improve Stochastic Balancer to write HDFS favoured node hints for region primary blocks to avoid destroying data locality if needing to use HDFS Balancer
                 Key: HBASE-21014
                 URL: https://issues.apache.org/jira/browse/HBASE-21014
             Project: HBase
          Issue Type: Improvement
          Components: Balancer
    Affects Versions: 1.1.2
            Reporter: Hari Sekhon


Improve Stochastic Balancer to include the HDFS region location hints to avoid HDFS Balancer destroying data locality.

Right now according to a mix of docs, jiras and mailing list info it appears that one must change
{code:java}
hbase.master.loadbalancer.class{code}
to the org.apache.hadoop.hbase.favored.FavoredNodeLoadBalancer as it looks like this functionality is only within FavouredNodeBalancer and not the standard Stochastic Balancer.

[http://hbase.apache.org/book.html#_hbase_and_hdfs]

This is not ideal because we'd still like to use all the heuristics and work that has gone in the Stochastic Balancer which I believe right now is the best and most mature HBase balancer.

See also the linked Jiras and this discussion:

[http://apache-hbase.679495.n3.nabble.com/HDFS-Balancer-td4086607.html]



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