[Beowulf] running out of rsh ports

[Joe Landman]

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

You are likely out of luck unless you hack the inetd/xinetd source to 
allow non-privileged ports to connect.

Is there something in particular you are doing that requires rsh versus 
other tools?

-- 

Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
phone: +1 734 786 8423
fax  : +1 734 786 8452 or +1 866 888 3112
cell : +1 734 612 4615

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