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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12053) Ozone: ozone server should create missing metadata directory if it has permission to
Date Thu, 29 Jun 2017 02:17:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16067597#comment-16067597
] 

Weiwei Yang commented on HDFS-12053:
------------------------------------

Thanks [~msingh] for your comments, I've updated the patch to address #1. Not sure if #2 would
buy us any good, in v2 patch I still use that to check if the dir is a directory. But let
me know if you still want me to change this. Thank you.

> Ozone: ozone server should create missing metadata directory if it has permission to
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-12053
>                 URL: https://issues.apache.org/jira/browse/HDFS-12053
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>         Attachments: HDFS-12053-HDFS-7240.001.patch, HDFS-12053-HDFS-7240.002.patch
>
>
> Datanode state machine right now simple fails if container metadata directory is missing,
it is better to create the directory if it has permission to. This is extremely useful at
a fresh setup, usually we set {{ozone.container.metadata.dirs}} to be under same parent of
{{dfs.datanode.data.dir}}. E.g
> * /hadoop/hdfs/data
> * /hadoop/hdfs/scm
> if I don't pre-setup /hadoop/hdfs/scm/repository, ozone could not be started.



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