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From Jim Kellerman <...@powerset.com>
Subject RE: [jira] Updated: (HBASE-71) [hbase] Master should rebalance region assignments periodically
Date Thu, 03 Apr 2008 03:37:59 GMT
I am in the process of reviewing the updated patch, but I am toast for today, so I will finish
it tomorrow.

---
Jim Kellerman, Senior Engineer; Powerset


> -----Original Message-----
> From: Bryan Duxbury (JIRA) [mailto:jira@apache.org]
> Sent: Wednesday, April 02, 2008 2:07 PM
> To: hbase-dev@hadoop.apache.org
> Subject: [jira] Updated: (HBASE-71) [hbase] Master should
> rebalance region assignments periodically
>
>
>      [
> https://issues.apache.org/jira/browse/HBASE-71?page=com.atlass
ian.jira.plugin.system.issuetabpanels:all-tabpanel ]
>
> Bryan Duxbury updated HBASE-71:
> -------------------------------
>
>     Status: Patch Available  (was: Open)
>
> Please review.
>
> > [hbase] Master should rebalance region assignments periodically
> > ---------------------------------------------------------------
> >
> >                 Key: HBASE-71
> >                 URL: https://issues.apache.org/jira/browse/HBASE-71
> >             Project: Hadoop HBase
> >          Issue Type: Improvement
> >          Components: master
> >            Reporter: Bryan Duxbury
> >            Assignee: Bryan Duxbury
> >             Fix For: 0.2.0
> >
> >         Attachments: 71-v2.patch, 71.patch
> >
> >
> > The master currently only does region assignments at
> startup or when there are splits or dead regionservers. This
> means that if you join a new regionserver to the cluster
> after startup, it does not get assigned a fair share of the
> already-served regions as you would expect. It only gets a
> share of new regions being served.
> > The master should periodically check the balance of
> regions, based on whatever assignment function, instead of in
> reaction to the above listed events.
>
> --
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