Re: openMosix + MPI + PBS

On 18 December 2005 at 12:35, Talimades wrote:
| Hello,
| I have a cluster with openMosix (on Suse 9.0).
| As I have understood openMosix takes charge of the efficient 
| distribution of the work.
| But on the other hand when MPI wants to be used it is necessary to say 
| those who are the nodes that will be used.

I believe this is covered in the FAQ or openMosix wiki: You can combine the
two: tell MPI to launch 'N' instances. If you do that in an openMosix cluster
with 'M' computers, you are likely to end up with N/M instances per node (for
as long as the N instances are roughly equal, and your computing nodes are
identical; otherwise openMosix adjusts).

I have a few slides from talks at Usenix 2004 and DSC 2005 that talk about
this. I often use a higher level wrapper for R called SNOW (for 'Simple
Network Of Workstations') which can uses MPI, PVM or plain old sockets.

| I would like to know which is the best way of doing that the users put 
| works in queue.
| I know that exists openPBS, but I really don't know how it works, what 
| is, what allows to do and what not, etc.
| 
| Can someone orientate me?
| Some good link to learn of all that?

You may benefit from reading a book like Sloan's 'High Performance Linux
Clusters with Oscar, Rocks, openMosix and MPI'. 

Hope this helps, Dirk

-- 
Hell, there are no rules here - we're trying to accomplish something. 
                                                  -- Thomas A. Edison


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