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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2991) Add support for refreshNodes in master
Date Thu, 16 Sep 2010 00:43:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909977#action_12909977
] 

ryan rawson commented on HBASE-2991:
------------------------------------

One does not need to decommission a regionserver... just shut it down with
whatever cluster tools one prefers.

Its tricky because its a slippery slope to cluster management built into
hbase, something I think we'd like to avoid.
https://issues.apache.org/jira/browse/HBASE-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909965#action_12909965]
being unnecessary. They are part of both HDFS and Mapreduce and are very
important. If one is moving nodes between clusters, includes/excludes lists
become essential to insure that only the nodes we expect to be in the
cluster are part of the cluster.
because in the HDFS case there is a "decommissioning" state that happens
once the exclude command is received. But basically the desired behavior for
the regionserver would be either:
script called `hbaseadmin`, if we want to maintain command name consistency)
with cluster exclusion functionality similar to the capabilities of dfsadmin
and mradmin. For ease of administration, the behavior of this option should
be procedurally identical to the functions of the Hadoop Common components,
including modifying the exclusion list via a local 'excludes' configuration
file and display of excluded nodes via the web UI.
http://hadoop.apache.org/common/docs/current/commands_manual.html#dfsadmin


> Add support for refreshNodes in master
> --------------------------------------
>
>                 Key: HBASE-2991
>                 URL: https://issues.apache.org/jira/browse/HBASE-2991
>             Project: HBase
>          Issue Type: Wish
>          Components: master
>            Reporter: Matthew Welty
>            Priority: Minor
>
> -refreshNodes capabilities should be added to bin/hbase (or to a new script called `hbaseadmin`,
if we want to maintain command name consistency) with cluster exclusion functionality similar
to the capabilities of dfsadmin and mradmin. For ease of administration, the behavior of this
option should be procedurally identical to the functions of the Hadoop Common components,
including modifying the exclusion list via a local 'excludes' configuration file and display
of excluded nodes via the web UI.
> A command overview for the behavior of -refreshNodes in dfsadmin is here:
> http://hadoop.apache.org/common/docs/current/commands_manual.html#dfsadmin
> The command overview for -refreshNodes in mradmin is here:
> http://hadoop.apache.org/common/docs/current/commands_manual.html#mradmin

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