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Date: Mon, 19 May 2008 12:23:55 -0700 (PDT)
From: "Jim Kellerman (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-2916) Refactor src structure, but leave
 package structure alone
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    [ https://issues.apache.org/jira/browse/HADOOP-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598052#action_12598052 ] 

Jim Kellerman commented on HADOOP-2916:
---------------------------------------

> Doug Cutting - 19/May/08 11:12 AM
> Shouldn't we generally avoid big changes right before a branch? If we want it in 0.17, then we
> should do it now, not at the last minute, no? But I still don't see any advantage of doing this
> independently of HADOOP2885...

-1 on including this in 0.17. It is too radical of a change for a 'patch' release.
+1 on including this in 0.18. Hiding implementation is a good idea.


> Refactor src structure, but leave package structure alone
> ---------------------------------------------------------
>
>                 Key: HADOOP-2916
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2916
>             Project: Hadoop Core
>          Issue Type: Sub-task
>          Components: dfs
>            Reporter: Sanjay Radia
>            Assignee: Raghu Angadi
>         Attachments: convert-patch.sed, convert-patch.sed, HADOOP-2916.patch, svn-commands.sh, svn-commands.sh
>
>
> This Jira proposes that the src structure be split  as below.
>  The package structure remains the same for this Jira. (Package renaming is part of other JIras  such as HADOOP-2885).
> The idea is that the src will be split   BEFORE the package restructuring
> The new proposed src structure is
> src/test - unchanged
> src/java - will no longer exit , its content will be move to one of core, hdfs, or mapred
> src/core - this will contain the core classes that hadoop applications need to link against.
>   It will contain client side libraries of  all fs file systems:  local, hdfs, kfs, etc
>   jar name hadoop_core.jar
>    src/core/org.apache.hadoop.{conf, fs, filechache, io, ipc, log, metrics, net, record, security, tools, util)
>    src/core/org.apache.hadoop.dfs - this will contain only the client side parts of dfs.
>                    HADOOP-2885 will rename package dfs  to package  fs.hdfs 
> src/hdfs/org.apache.hadoop.dfs - this will contain only the server side of hdfs. 
>       HADOOP-2885 will rename package dfs  to package  fs.hdfs later; a compatible dfs.DistributedFileSystem will be left for compatibility/
>    jar name hadoop_hdfs.jar - this jar can be used to launce NNs and DNs etc.
> src/mapred/org.apache.hadoop.mapred.*
>    Initially one jar:  hadoop_mapred.jar
>    Later this may be split into client-side and server-side jars.

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