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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2934) HA: Allow configs to be scoped to all NNs in the nameservice
Date Fri, 10 Feb 2012 07:14:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205271#comment-13205271

Todd Lipcon commented on HDFS-2934:

The shared edits dir, for example, might be {{/filer/clusters/foo/}} for one federated nameservice
but {{/filer/clusters/bar/}} for another.

> HA: Allow configs to be scoped to all NNs in the nameservice
> ------------------------------------------------------------
>                 Key: HDFS-2934
>                 URL: https://issues.apache.org/jira/browse/HDFS-2934
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
> Currently, for namenode-specific keys in HA, one must configure them as keyfoo.nameserviceid.namenodeid.
However, in many cases all of the NNs in a nameservice would share the same value. So we should
allow the configuration of "keyfoo.nameserviceid" to apply to all NNs. The resolution path
for these keys would then be:
> keyfoo.nameserviceid.nnid
> keyfoo.nameserviceid (if above not set)
> keyfoo (if neither of above set)

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