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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6255) Create an rpm integration project
Date Fri, 11 Feb 2011 21:27:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12993709#comment-12993709
] 

Allen Wittenauer commented on HADOOP-6255:
------------------------------------------

> Yes, $PREFIX/var/lib/task-tracker is for MR spill space.

I'm slightly disturbed by the connotation that var/lib carries here.  The TT (and MR framework
as a whole) is pretty horrific at disk space management and requires ops teams to intervene
quite a bit.  I feel as though if we make it var/lib, ops teams will be more hesitant to clean
it out.

> Stuff in lib are usually meant for C libraries, hence Owen suggested to put jar files
in share.

Someone needs to tell perl, python, ruby, tcl/tk, ... that they shouldn't be putting stuff
there then. :D

In the case of all those languages, they create a /usr/lib/(language) dir and then start filling
it with appropriate stuff.  There is also plenty of precedent for application specific libraries
being in /usr/lib/(application).  Jar files are as close to C .so's as Java gets.  It makes
more sense to me to put them in lib.

> The default configuration goes to /usr/share/hadoop/conf and /etc/hadoop is symlink to
conf

Do you mean that /etc/hadoop -> /usr/share/hadoop/conf?  If so, that is very wrong.  /etc/hadoop
shouldn't be a symlink to anything and is the place where the human editable files are at.

> Create an rpm integration project
> ---------------------------------
>
>                 Key: HADOOP-6255
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6255
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 0.20.100
>            Reporter: Owen O'Malley
>            Assignee: Eric Yang
>             Fix For: 0.20.100
>
>         Attachments: HADOOP-6255.patch, deployment.pdf
>
>
> We should be able to create RPMs for Hadoop releases.

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