[padb-users] configuration file format.

[Daniel Kidger]

Ashley,
Is Clustershell quite new? - and how does it compare / contrast with LLNL's
pdsh ? perhaps on extreme scalability?

I understand that Clustershell is by Stéphane Thiell of the CEA.
(which have mostly Bull hardware so slightly surprised I haven't heard of
clustershell before).

CEA wrote Shine for Lustre management - I think Clustershell underpins it?

Daniel





On 23 November 2010 08:03, Ashley Pittman <ashley at pittman.co.uk> wrote:

>
> On 23 Nov 2010, at 08:02, Jie Cai wrote:
> > Yes, I do mean backend launch mode.
>
> You can set this as any other configuration option, file-based, environment
> based or command line.
>
> >> http://code.google.com/p/padb/source/detail?r=407
> >>
> >> You can set the launch_mode but not the mode in the configuration file.
>  I only added the launch_mode option a few weeks ago and hadn't spotted the
> naming conflict so I could re-name this to backend_launch_mode if it would
> clear up any confusion.
> >>
> > I saw in the latest HEAD, that pdsh only works for number of hosts < 128.
>
> This is based on the pdsh documentation that claims to run out of FDs for
> large node counts, this could be a hangover from when pdsh used rsh
> connections rather than spawning ssh processes though.
>
> > How to actually switch on rmgr launch_mode?
>
> This should be on and in preference to pdsh by default, if you are using
> pbs though then the resource manager doesn't provide it's own launch
> mechanism so pdsh is the only option currently.
>
> An option I'm looking at is clustershell which starts the remote processes
> in a tree formation so avoids this problem, the new launch_mode should allow
> easy integration of new remote shell tools but I've not had time to
> experiment yet.
>
> http://sourceforge.net/projects/clustershell/
>
> Ashley.
>
> --
>
> Ashley Pittman, Bath, UK.
>
> Padb - A parallel job inspection tool for cluster computing
> http://padb.pittman.org.uk
>
>
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