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Posted to hdfs-issues@hadoop.apache.org by "Ming Ma (JIRA)" <ji...@apache.org> on 2015/10/02 03:22:27 UTC
[jira] [Commented] (HDFS-7877) Support maintenance state for
datanodes
[ https://issues.apache.org/jira/browse/HDFS-7877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14940676#comment-14940676 ]
Ming Ma commented on HDFS-7877:
-------------------------------
Maybe we should try to support persistence for timeout. We can persist the maintenance expiration UTC time via some new mechanism discussed in HDFS-9005. The clock can be out of sync among NNs, but we can accept that given the maintenance timeout precision is in the order of minutes. [~ctrezzo] [~eddyxu], thought?
> Support maintenance state for datanodes
> ---------------------------------------
>
> Key: HDFS-7877
> URL: https://issues.apache.org/jira/browse/HDFS-7877
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Ming Ma
> Attachments: HDFS-7877-2.patch, HDFS-7877.patch, Supportmaintenancestatefordatanodes-2.pdf, Supportmaintenancestatefordatanodes.pdf
>
>
> This requirement came up during the design for HDFS-7541. Given this feature is mostly independent of upgrade domain feature, it is better to track it under a separate jira. The design and draft patch will be available soon.
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