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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4987) Namenode changes to track multiple storages
Date Wed, 28 Aug 2013 06:38:55 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE resolved HDFS-4987.
------------------------------------------

       Resolution: Fixed
    Fix Version/s: Heterogeneous Storage (HDFS-2832)
     Hadoop Flags: Reviewed

Thanks Arpit and Junping for reviewing the patches.

I have committed this.  Note that some unit tests in the branch may fail.  We will fix them
when feature is getting ready.
                
> Namenode changes to track multiple storages
> -------------------------------------------
>
>                 Key: HDFS-4987
>                 URL: https://issues.apache.org/jira/browse/HDFS-4987
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Suresh Srinivas
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: Heterogeneous Storage (HDFS-2832)
>
>         Attachments: h4987_20130822.patch, h4987_20130827b.patch, h4987_20130827c.patch,
h4987_20130827.patch, h4987_20130828.patch
>
>
> Currently namenode track in BlockInfo, the corresponding DataNodeDescriptor. I propose
changing this with new abstraction StorageDescriptor. This change will also make DatanodeDescriptor
a collection of StroageDescriptors. This will allow given a block, identify its storage and
also Datanode.

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