On Wed, 3 May 2006, Clements, Brent M (SAIC) wrote:
I second pdsh
And there is nothing wrong with the "use ssh" solution either, for most
reasonably designed parallel applications that use a remote shell to
e.g. fork off remote copies of pvmd or an application that will run for
any time long compared to the 0.1 second or so associated with ssh
startup.
There are exceptions. Discussions of same are in the list archives,
somewhere.
rgb
Brent Clements
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From: [EMAIL PROTECTED] on behalf of Joe Landman
Sent: Wed 5/3/2006 1:14 PM
To: Dan Stromberg
Cc: Kipp Cannon; [email protected]
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: [EMAIL PROTECTED]
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Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
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