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From "zhouyingchao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11573) Support rename between different NameNodes in federated HDFS
Date Fri, 27 Jul 2018 10:19:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

zhouyingchao updated HDFS-11573:
    Flags: Patch

> Support rename between different NameNodes in federated HDFS
> ------------------------------------------------------------
>                 Key: HDFS-11573
>                 URL: https://issues.apache.org/jira/browse/HDFS-11573
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: federation
>            Reporter: zhouyingchao
>            Priority: Major
>         Attachments: HDFS-11573-2.6.5-001.patch, HDFS_federation_rename.pdf
>        Federated file system can improve overall scalability by dividing a single namespace
into multiple sub-namespaces. Since the divided sub-namespace are held by different namenodes,
rename operation between those sub-namespace is forbidden. Due to this restriction, many applications
have to be rewritten to work around the issue after migrated to federated file system. Supporting
rename between different namenodes would make it much easier to migrate to federated file
>        We have finished a preliminary implementation of this feature in a 2.6 branch.
 I'll upload a write-up regarding the design in a few days. And then I'll re-org the code
against the trunk and upload the patch.

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