[jira] Commented: (HADOOP-2885) Restructure the hadoop.dfs package

["Sanjay Radia (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-2885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12596507#action_12596507 ] 

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?

BTW as per proposal 1, the package name  will change from dfs to hdfs.
hdfs.DFSClient and hdfs.DistributedFileSystem are not for public use, 
 although based on the internal needs of the hdfs package these classes may or may not be public (haven't quite figured out the details yet).




> 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: 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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