[Beowulf] Small Distributed Clusters
tjrc at sanger.ac.uk
Fri Jul 4 05:45:18 PDT 2008
On 4 Jul 2008, at 12:10 pm, Tony Travis wrote:
> I suggest you have a look at "dsh" (Dancer's distributed shell) as a
> simple way to run programs across local and geographically separate
> nodes in your cluster. This is very simple, but works remarkably
> well, especially if you use SSH keys for password-less authentication.
dsh is very good, I agree, as is clusterssh. They have overlapping,
but distinct, purposes. clusterssh gives you multiple xterms but with
a single input window so you type into all xterms simultaneously
(although you can still put the focus in an individual xterm, and just
type commands to that one machine alone). clusterssh is useful for
those tasks which are more interactive. dsh is better for rapid
parallel running of non-interactive commands on very large numbers of
machines... clusterssh gets a little unwieldy with more than 30 or so
machines at a time, even if you set the xterm font to eye-wateringly
small and have a monitor the size of a football pitch.
Both are available as packages in Ubuntu/Debian.
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