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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11557) ViewFileSystem should init mount points lazily
Date Wed, 06 May 2015 03:29:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated HADOOP-11557:
--------------------------------------
    Labels: BB2015-05-TBR  (was: )

> ViewFileSystem should init mount points lazily
> ----------------------------------------------
>
>                 Key: HADOOP-11557
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11557
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: viewfs
>    Affects Versions: 2.6.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>              Labels: BB2015-05-TBR
>         Attachments: HADOOP-11557.001.patch
>
>
> ViewFs initialization overhead can range from a couple to 10+ seconds linearly increasing
with the number of mounted namespaces. Eager initialization is both expensive (especially
when multiplied by MR tasks if viewfs is the defaultFS) and also provides for frustrating
experience for users interactively working via FsShell with a single mount point (MP) under
their user directory. Internal directories should not require MP initialization at all. 



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