You are viewing a plain text version of this content. The canonical link for it is here.

Posted to mapreduce-user@hadoop.apache.org by Pedro Costa <ps...@gmail.com> on 2010/11/05 12:54:07 UTC

why MapReduce uses SSH?

Whe Hadoop MapReduce needs SSH? When SSH is used?

-- 
Pedro

Re: why MapReduce uses SSH?

Posted by Harsh J <qw...@gmail.com>.

Hello,

SSH is not used by MapReduce directly, but rather by the helper shell
scripts that reside in the bin/ folder of the Hadoop distribution
(scripts that can ssh and start all daemons, can rsync the hadoop copy
across all machines, help you run commands on all hosts listed in
slaves file, etc.).

It does not 'need' SSH, but stuff's easy with it. There's also Puppet,
etc. one can use instead.

On Fri, Nov 5, 2010 at 5:24 PM, Pedro Costa <ps...@gmail.com> wrote:
> Whe Hadoop MapReduce needs SSH? When SSH is used?
>
> --
> Pedro
>

-- 
Harsh J
www.harshj.com