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From "Mikhail Erofeev (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12292) Federation: Support viewfs:// schema path for DfsAdmin commands
Date Fri, 18 Aug 2017 19:46:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Erofeev updated HDFS-12292:
-----------------------------------
    Attachment: HDFS-12292-004.patch

> Federation: Support viewfs:// schema path for DfsAdmin commands
> ---------------------------------------------------------------
>
>                 Key: HDFS-12292
>                 URL: https://issues.apache.org/jira/browse/HDFS-12292
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: federation
>            Reporter: Mikhail Erofeev
>            Assignee: Mikhail Erofeev
>         Attachments: HDFS-12292-002.patch, HDFS-12292-003.patch, HDFS-12292-004.patch,
HDFS-12292.patch
>
>
> Motivation:
> As of now, clients need to specify a nameservice when a cluster is federated, otherwise,
the exception is fired:
> {code}
> hdfs dfsadmin -setQuota 10 viewfs://vfs-root/user/uname
> setQuota: FileSystem viewfs://vfs-root/ is not an HDFS file system
> # with fs.defaultFS = viewfs://vfs-root/
> hdfs dfsadmin -setQuota 10 vfs-root/user/uname
> setQuota: FileSystem viewfs://vfs-root/ is not an HDFS file system
> # works fine thanks to https://issues.apache.org/jira/browse/HDFS-11432
> hdfs dfsadmin -setQuota 10 hdfs://users-fs/user/uname
> {code}
> This creates inconvenience, inability to rely on fs.defaultFS and forces to create client-side
mappings for management scripts
> Implementation:
> PathData that is passed to commands should be resolved to its actual FileSystem
> Result:
> ViewFS will be resolved to the actual HDFS file system



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