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From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2769) HA: When HA is enabled with a shared edits dir, that dir should be marked required
Date Sat, 04 Feb 2012 01:02:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13200228#comment-13200228

Eli Collins commented on HDFS-2769:

Shared storage does not imply a single point of failure. There are eg HA filers, nic bonding,
etc. though I agree in this scenario the availability is limited by the availability of the
shared storage. I also agree that is a deficiency we need to address, by supporting multiple
shared dirs (HDFS-2782), followed by removing the shared storage requirement.
> HA: When HA is enabled with a shared edits dir, that dir should be marked required
> ----------------------------------------------------------------------------------
>                 Key: HDFS-2769
>                 URL: https://issues.apache.org/jira/browse/HDFS-2769
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-2769-HDFS-1623.patch
> HDFS-2430 introduced the concept of "required" edits/name dirs, which are not treated
as redundant when considering NN storage failure. When a shared edits dir is used, this should
automatically be marked as required.

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