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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6061) Allow dfs.datanode.shared.file.descriptor.path to contain multiple entries and fall back when needed
Date Thu, 06 Mar 2014 03:01:44 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13921944#comment-13921944
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Colin Patrick McCabe commented on HDFS-6061:
--------------------------------------------

bq. You can use Configuration#getTrimmedStringCollection rather than your own comma splitting

ok

bq. Can we delete temp files from each path only as needed? Might save a little startup time.

yeah

> Allow dfs.datanode.shared.file.descriptor.path to contain multiple entries and fall back
when needed
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6061
>                 URL: https://issues.apache.org/jira/browse/HDFS-6061
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 2.4.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-6061.001.patch
>
>
> In {{SharedFileDescriptorFactory}}, it would be nice if dfs.datanode.shared.file.descriptor.path
could contain multiple entries and allow fallback between them.  That way, if a user doesn't
have {{/dev/shm}} configured (the current default), the user could use {{/tmp}}.  This is
mainly a concern on BSDs and some other systems where {{/dev/shm}} doesn't exist.



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