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From Stack <st...@duboce.net>
Subject Re: Migrating pseudo distribute map reduce with user jar file to 0.90.1
Date Wed, 27 Apr 2011 17:49:46 GMT
On Tue, Apr 26, 2011 at 8:34 PM, Pete Tyler <peteralantyler@gmail.com> wrote:
>   "When you upgrade to CDH3, two new Unix user accounts called hdfs and
> mapred are automatically created to support security:"
>
> makes no sense to me as my entire installation process involved unzipping
> your tar ball.
>

OK.  So, the statement above probably goes along w/ the case where
cdh3 is 'installed'.  If you untar a tar ball, yeah, no users are
going to be made.


> This then leads to my confusion over the permissions guidelines,
>
> DirectoryOwnerPermissions (see Footnote 1)dfs.name.dirhdfs:hadoopdrwx------
> dfs.data.dirhdfs:hadoopdrwx------mapred.local.dirmapred:hadoopdrwxr-xr-x
> mapred.system.dir in HDFSmapred:hadoop(see Footnote 2)
>

The above is just making dirs in hdfs available to users running these
processes.



> If anyone can please help me that would be great. At the moment I feel I'm
> in danger of losing two years work due to the enormous gulf between the
> HBase 0.20.4 and the HBase 0.90.1. environments :(
>

Yeah, a bunch happened in between.

St.Ack

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