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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2231) Configuration changes for HA namenode
Date Thu, 11 Aug 2011 18:58:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083391#comment-13083391
] 

Konstantin Shvachko commented on HDFS-2231:
-------------------------------------------

bq. You want to use backup node ... Some want solution where they do not want ip failover,
nor special load balancer.

I think Allen's point is which approach are you taking and implementing. I've asked this many
times. It seems that you are building a universal HA framework that would fit multiple approaches.
If so that would be "trying to do too much" as Allen states. E.g. with IP failover approach
you probably don't need any configuration changes.

bq. if you do not make changes. and overload backup configuration to mean standby, it is not
clean.

"clean" is a subjective metrics.
The configuration parameters should be the same for Backup and Standby nodes. As these are
only different roles of the single NodeNode. If some of existing parameters need to be reasonably
renamed I'm for it.

> Configuration changes for HA namenode
> -------------------------------------
>
>                 Key: HDFS-2231
>                 URL: https://issues.apache.org/jira/browse/HDFS-2231
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: HA branch (HDFS-1623)
>
>
> This jira tracks the changes required for configuring HA setup for namenodes.

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