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From "Joe Pallas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10636) Modify ReplicaInfo to remove the assumption that replica metadata and data are stored in java.io.File.
Date Mon, 18 Jul 2016 19:09:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15382860#comment-15382860
] 

Joe Pallas commented on HDFS-10636:
-----------------------------------

I haven't reviewed every line, but I noticed in {{FsDatasetUtil.createNullChecksumFile}} there's
a {{// TODO Auto-generated catch block}}.

Overall I like this, and that it addresses some of the issues raised in HDFS-5194.

One question about naming:  In the context of HDFS-9806, the distinction between Provided
and Local makes sense.  But there might be other replica implementations that use non-{{File}}
based storage but are still "local".  I don't have a concrete alternative to "Local" to propose,
though.

> Modify ReplicaInfo to remove the assumption that replica metadata and data are stored
in java.io.File.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-10636
>                 URL: https://issues.apache.org/jira/browse/HDFS-10636
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, fs
>            Reporter: Virajith Jalaparti
>         Attachments: HDFS-10636.001.patch
>
>
> Replace java.io.File related APIs from {{ReplicaInfo}}, and enable the definition of
new {{ReplicaInfo}} sub-classes whose metadata and data can be present on external storages
(HDFS-9806). 



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