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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9809) Abstract implementation-specific details from the datanode
Date Sat, 19 Mar 2016 00:12:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202394#comment-15202394

Zhe Zhang commented on HDFS-9809:

Thanks [~virajith] for the work. The overall idea sounds good.

I wonder if this work is only useful in the context of HDFS-9806? If so:
# I guess we should make it a subtask
# We probably need a HDFS-9806 design to assess some implementation details here

If the scope is beyond HDFS-9806, could you explain what other {{ReplicaInfo}} types will
be added besides {{LocalReplica}}?

> Abstract implementation-specific details from the datanode
> ----------------------------------------------------------
>                 Key: HDFS-9809
>                 URL: https://issues.apache.org/jira/browse/HDFS-9809
>             Project: Hadoop HDFS
>          Issue Type: Task
>            Reporter: Virajith Jalaparti
>            Assignee: Virajith Jalaparti
>         Attachments: HDFS-9809.001.patch
> Multiple parts of the Datanode (FsVolumeSpi, ReplicaInfo, FSVolumeImpl etc.) implicitly
assume that blocks are stored in java.io.File(s) and that volumes are divided into directories.
We propose to abstract these details, which would help in supporting other storages. 

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