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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2885) Restructure the hadoop.dfs package
Date Tue, 11 Mar 2008 06:08:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12577315#action_12577315
] 

dhruba borthakur commented on HADOOP-2885:
------------------------------------------

I vote for Proposal 1. It allows us to ship a new version of HDFS (client and server) without
installing a "core" package. Regarding the question of whether the wire protocol or the FileSystem
API is the "true" interface, I would say that the FileSystem API is the standard.

At some future time, if Hadoop becomes so popular that it is widely used, Linux distributions
might come pre-packaged with core.jar and hdfs-client.jar pre-installed. In that case, the
HDFS wire protocol becomes sacrosanct and public. Option 1 allows this scenario too.

> 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
>             Fix For: 0.17.0
>
>         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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