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Posted to common-dev@hadoop.apache.org by "Gera Shegalov (JIRA)" <ji...@apache.org> on 2015/02/07 01:41:36 UTC

[jira] [Created] (HADOOP-11557) ViewFileSystem should init mount points lazily

Gera Shegalov created HADOOP-11557:
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             Summary: 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


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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