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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Password less ssh from slave to slave
Date Mon, 08 Mar 2010 18:34:13 GMT
On Mon, Mar 8, 2010 at 8:50 AM, Massoud Mazar <Massoud.Mazar@avg.com> wrote:
> As far as I have seen, password-less ssh is only required from Master to slaves, to start/stop
slave services.
> -----Original Message-----
> From: bharath v [mailto:bharathvissapragada1990@gmail.com]
> Sent: Monday, March 08, 2010 8:47 AM
> To: core-user@hadoop.apache.org
> Subject: Password less ssh from slave to slave
> Hi all,
> Do we require a Password less ssh from slave to slave ?
> Thanks
Yes and No. (Mostly no) The hadoop components have their own protocol.

Password-less SSH is  used to by start-all.sh components, they using
the remote SSH commands.

a localstartup looks like this:
cd $hadoop_home
bin/hadoop-daemon.sh stop namenode
bin/hadoop-daemon.sh stop datanode
bin/hadoop-daemon.sh stop jobtracker
bin/hadoop-daemon.sh stop tasktracker

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