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Eli Collins commented on HDFS-2769:
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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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