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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12740) SCM should support a RPC to share the cluster Id with KSM and DataNodes
Date Tue, 21 Nov 2017 22:52:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16261624#comment-16261624
] 

Anu Engineer commented on HDFS-12740:
-------------------------------------

Sorry to comment this late, can some please tell me what happens if I have an SCM, I run --init
command against it, and then that SCM restarts? From the patch, I see we are generating a
UUID but I don't see any persistence. Is that part of some other JIRA?

> SCM should support a RPC to share the cluster Id with KSM and DataNodes
> -----------------------------------------------------------------------
>
>                 Key: HDFS-12740
>                 URL: https://issues.apache.org/jira/browse/HDFS-12740
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: HDFS-7240
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>             Fix For: HDFS-7240
>
>         Attachments: HDFS-12740-HDFS-7240.001.patch, HDFS-12740-HDFS-7240.002.patch,
HDFS-12740-HDFS-7240.003.patch, HDFS-12740-HDFS-7240.004.patch, HDFS-12740-HDFS-7240.005.patch
>
>
> When the ozone cluster is first Created, SCM --init command will generate cluster Id
as well as SCM Id and persist it locally. The same cluster Id and the SCM id will be shared
with KSM during the KSM initialization and Datanodes during datanode registration. 



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