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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1414) add server status logging chore to ServerManager
Date Tue, 12 May 2009 23:50:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12708689#action_12708689

stack commented on HBASE-1414:

I was thinking of doing something similar -- fools seldom differ -- but I was thinking it
should be metrics based. What you think Andrew?  Then it'd show in the UI and in ganglia too
as well as in logs?

> add server status logging chore to ServerManager
> ------------------------------------------------
>                 Key: HBASE-1414
>                 URL: https://issues.apache.org/jira/browse/HBASE-1414
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.20.0
>         Attachments: hbase-1414.patch
> Adds a small chore to master.ServerManager that logs the number of reporting region servers,
the number of region servers declared dead (and their identity), and the average load. Uses
the metaScanner period. Useful for those that tail the master log to get a sense of system
health, or are considering writing Nagios monitors etc. which do the same. 

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