hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Billy Pearson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-862) region balancing is clumsy
Date Mon, 08 Sep 2008 05:04:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629071#action_12629071

Billy Pearson commented on HBASE-862:

I added some ideas to HBASE-678 that might be helpful for balancing on start up later down
the road when we get a safe mode.

> region balancing is clumsy
> --------------------------
>                 Key: HBASE-862
>                 URL: https://issues.apache.org/jira/browse/HBASE-862
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
> Daniel Leffel has an install of 500 regions on 4 nodes.  He's running 0.2.0.
> On restart, load balancing is running while the 600 regions are being initially opened.
 Makes for churn.  Load balancing should wait before it cuts in.
> Have also seen on occasion that it will not find equilibrium after a restart.
> Adding a node is catastrophic.  >20% of the regions were closed and were taking the
longest time to show up on the new server.  I would think that the region balancing would
work in more sophisticated and gradual manner.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message