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Posted to common-dev@hadoop.apache.org by "Eli Collins (JIRA)" <ji...@apache.org> on 2012/04/20 23:27:33 UTC

[jira] [Created] (HADOOP-8299) ViewFs doesn't work with a slash mount point

Eli Collins created HADOOP-8299:
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             Summary: ViewFs doesn't work with a slash mount point
                 Key: HADOOP-8299
                 URL: https://issues.apache.org/jira/browse/HADOOP-8299
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
    Affects Versions: 2.0.0
            Reporter: Eli Collins


We currently assume [a typical viewfs client configuration|https://issues.apache.org/jira/secure/attachment/12507504/viewfs_TypicalMountTable.png] is a set of non-overlapping mounts. This means every time you want to add a new top-level directory you need to update the client-side mountable config. If users could specify a slash mount, and then add additional mounts as necessary they could add a new top-level directory without updating all client configs (as long as the new top-level directory was being created on the NN the slash mount points to). This could be achieved by HADOOP-8298 (merge mounts, since we're effectively merging all new mount points with slash) or having the notion of a "default NN" for a mount table.

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