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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2885) Restructure the hadoop.dfs package
Date Tue, 24 Jun 2008 01:41:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607438#action_12607438
] 

Sanjay Radia commented on HADOOP-2885:
--------------------------------------


>As per the above discussion, fs.FileSystem is the real public interface.
>Do we need to provide backward compatibility for dfs.DistributedFileSystem and dfs.DFSClient
which are currently public?

No one should  be using these two dfs  classes directly because  fs.FileSystem, provides the
necessary functionality.
My suggestion is that we don't provide backward compatibility as part of this Jira. If we
hear complaints from folks using these two dfs classes then
we can  add the backward compatible classes as a separate Jira in the current release. 
It would be useful to quickly surface users of these two "private" classes.


Also I will file a new Jira to fix the build of the Javadoc to remove the hdfs classes form
the public javadoc (with a blocker for current release).


> Restructure the hadoop.dfs package
> ----------------------------------
>
>                 Key: HADOOP-2885
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2885
>             Project: Hadoop Core
>          Issue Type: Sub-task
>          Components: dfs
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>            Priority: Minor
>         Attachments: 2885_run1_svn-commands.sh, 2885_run2_svn-commands.sh, 2885_run_svn_add_new_file.sh,
HADOOP-2885_2.patch, Prototype dfs package.png
>
>
> This Jira proposes restructurign the package hadoop.dfs.
> 1. Move all server side and internal protocols (NN-DD etc) to hadoop.dfs.server.*
> 2. Further breakdown of dfs.server.
> - dfs.server.namenode.*
> - dfs.server.datanode.*
> - dfs.server.balancer.*
> - dfs.server.common.* - stuff shared between the various servers
> - dfs.protocol.*  - internal protocol between DN, NN and Balancer etc.
> 3. Client interface:
> - hadoop.dfs.DistributedFileSystem.java
> - hadoop.dfs.ChecksumDistributedFileSystem.java
> - hadoop.dfs.HftpFilesystem.java
> - hadoop.dfs.protocol.* - the client side protocol

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