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https://issues.apache.org/jira/browse/HADOOP-2885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575965#action_12575965
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Owen O'Malley commented on HADOOP-2885:
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I think that org.apache.hadoop.hdfs.* is better than
org.apache.hadoop.fs.hdfs.*. However, I'm not adamant about it.
I do feel strongly about how this interacts with src directory splitting.
core:
org.apache.hadoop.{io,conf,ipc,util,fs}
hdfs:
org.apache.hadoop.hdfs (or fs.hdfs)
mapreduce:
org.apache.hadoop.mapred
You can't put DistributedFileSystem and DFSClient in separate src directories
without making a cyclic dependence and that is very bad. Therefore, I think
they both need to be in the hdfs src tree. I think it is less confusing to have
the src trees *not* overlap packages and therefore it would be better to have
it in org.apache.hadoop.hdfs. I would even propose merging DFSClient and
DistributeFileSystem into a single class...
The kfs and s3 could stay in core because they are very thin wrappers over
their respective native file systems.
> 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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