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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