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https://issues.apache.org/jira/browse/HBASE-15156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15128623#comment-15128623
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stack commented on HBASE-15156:
-------------------------------
bq. stack quick question - mind telling me why branch-1 and not both master and
branch-1?
nvm. AM is changing in master is what I meant. Hopefully the need for this sort
of interpolation at multiple points changing an AM process that no one really
understands adding new failure modes that will be found six months down the
line when we've all forgotten what was done here will happen less. Master does
AM in AMv2. A config that says assign to servers other than that of the parents
will be an easier insert.
> Support first assignment of split daughters to non-parent RS
> ------------------------------------------------------------
>
> Key: HBASE-15156
> URL: https://issues.apache.org/jira/browse/HBASE-15156
> Project: HBase
> Issue Type: New Feature
> Reporter: Francis Liu
> Assignee: Francis Liu
> Attachments: HBASE-15156.patch
>
>
> On region split, the region's daughter is always opened by the same region
> server hosting the parent region. In some cases this is not ideal:
> This feature was mainly needed for favored nodes to allow for more freedom
> when selecting favored nodes for daughter regions. ie The daughter doesn't
> have to always select the regionserver hosting the split as a favored node
> which should allow for better favored node distribution.
> Though this feature is actually useful in cases where region splits occur
> much more often than the balancer is run. It also is a bit more efficient as
> the major compaction that occurs after daughter assignment does not go to
> waste (ie cancelled half-way, loss of locality due to move, etc). We actually
> run it this way in some of our clusters even without favored nodes enabled.
> Hence I am supplying a patch which is independent of favored nodes.
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