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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3866) Script to add regions gradually to a new regionserver.
Date Sat, 07 May 2011 14:22:03 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-3866:
--------------------------

    Attachment: 3866-max-regions-per-iteration.patch

Patch for master with "hbase.balancer.max.regions.periteration" parameter.

> Script to add regions gradually to a new regionserver.
> ------------------------------------------------------
>
>                 Key: HBASE-3866
>                 URL: https://issues.apache.org/jira/browse/HBASE-3866
>             Project: HBase
>          Issue Type: Improvement
>          Components: scripts
>    Affects Versions: 0.90.2
>            Reporter: Aravind Gottipati
>            Priority: Minor
>         Attachments: 3866-max-regions-per-iteration.patch, slow_balancer.rb, slow_balancer.rb
>
>
> When a new region server is brought online, the current balancer kicks off a whole bunch
of region moves and causes a lot of regions to be un-available right away.  A slower balancer
that gradually balances the cluster is probably a good script to have.  I have an initial
version that mooches off the region_mover script to do this.

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