Password less ssh from slave to slave

[bharath v <bh...@gmail.com>]

Hi all,

Do we require a Password less ssh from slave to slave ?

Thanks

Re: Password less ssh from slave to slave

[Edward Capriolo <ed...@gmail.com>]

On Mon, Mar 8, 2010 at 8:50 AM, Massoud Mazar <Ma...@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

RE: Password less ssh from slave to slave

[Massoud Mazar <Ma...@avg.com>]

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