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Date: Mon, 27 Mar 2017 14:10:42 +0000 (UTC)
From: "Mukul Kumar Singh (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Updated] (HDFS-11575) Supporting HDFS NFS gateway with
 Federated HDFS
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archived-at: Mon, 27 Mar 2017 14:10:47 -0000


     [ https://issues.apache.org/jira/browse/HDFS-11575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mukul Kumar Singh updated HDFS-11575:
-------------------------------------
    Status: Patch Available  (was: Open)

> Supporting HDFS NFS gateway with Federated HDFS
> -----------------------------------------------
>
>                 Key: HDFS-11575
>                 URL: https://issues.apache.org/jira/browse/HDFS-11575
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>            Reporter: Mukul Kumar Singh
>            Assignee: Mukul Kumar Singh
>         Attachments: HDFS-11575.001.patch, SupportingNFSwithFederatedHDFS.pdf
>
>
> Currently HDFS NFS gateway only supports HDFS as the underlying filesystem.
> Federated HDFS with ViewFS helps in improving the scalability of the name nodes. However NFS is not supported with ViewFS.
> With this change, ViewFS using HDFS as the underlying filesystem can be exported using NFS. ViewFS mount table will be used to determine the exports which needs to be supported.
> Some important points
> 1) This patch only supports HDFS as the underlying filesystem for ViewFS.
> 2) This patch add support to add more than one export point in the NFS gateway
> 3) Root filesystem of the ViewFS will not be mountable for NFS gateway with ViewFS,
>    however this will not be the case for NFS gateway with HDFS
> 4) A filehandle now apart from the field will also contain an identifier to identify the name node, this will be used to map to correct name node for file operations.
> Please find the attached pdf document which helps in explaining the design and the solution.
>  


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