[Beowulf] running out of rsh ports

Clements, Brent M (SAIC) brent.clements at bp.com
Wed May 3 11:22:04 PDT 2006

I second pdsh
Brent Clements
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From: beowulf-bounces at beowulf.org on behalf of Joe Landman
Sent: Wed 5/3/2006 1:14 PM
To: Dan Stromberg
Cc: Kipp Cannon; beowulf at beowulf.org
Subject: Re: [Beowulf] running out of rsh ports

Dan Stromberg wrote:
> On Wed, 2006-05-03 at 12:16 -0500, Bruce Allen wrote:
>> rsh typically uses ports in the 513-1023 range.  With a 640 node cluster
>> we are running out of ports.  This leads to messages such as:
>> "rcmd: socket: All ports in use"
>> Are there any standard solutions to this other than 'use ssh'?  We already
>> have net.ipv4.tcp_tw_recycle = 1 in /etc/sysctl.conf
> http://dcs.nac.uci.edu/~strombrg/loop.html

Hmmm.... we use pdsh for our (customers) clusters.  Works quite well.
Your example

        pdsh uname -a

does the same thing if it is setup right.


Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
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