Hi !
Joe, I don't have the faintest idea whether the chemical program uses MPI
directly or indirectly or not at all. The application uses the program
Linda, and I don't know the details of Linda.
Menjuei, I think I'm beginning to see where my reasoning was utterly
crooked. To know how a job is distributed across the cluster, I should look
at the programs that OSCAR installs, and not at OSCAR itself, since that is
not what OSCAR is intended for. Am I closer to the truth?
Someone that I know built a cluster without using OSCAR (or Rocks) and he
was saying things about OSCAR that I wanted to verify. However, it is quite
plain to me now that either he was generalizing and meaning the job
scheduler and queuing software when he actually said "OSCAR", or he is
really not as knowledgeable as he makes himself out to be.
Thus, I'm quite satisfied with the answer that I've received so far about my
perception being completely off the mark, and since I don't want to waste
anyone else's time any further, I will go and do some googling and
additional reading on my own. As for me, I am greatly indebted to the people
who have developed OSCAR.
Just imagine someone as clueless as myself trying to build a cluster from
scratch... Not good for the environment. ;-)
Thanks for helping me!
2009/6/9 Greenseid, Joseph M (IS) <joseph.greens...@ngc.com>
> Does your chemical app use MPI?
>
> --Joe
>
> ------------------------------
> *From:* Marion Randall [mailto:ranmar...@gmail.com]
> *Sent:* Tue 6/9/2009 3:26 PM
> *To:* oscar-users@lists.sourceforge.net
> *Subject:* [Oscar-users] Just a little theoretical question about OSCAR
>
> Hi!
>
> On my cluster I am running a chemical application. Am I right in saying
> that :
> OSCAR dishes out pieces of the chemical program (that can be parallelized)
> from the headnode to the compute nodes, and then the compute nodes calculate
> their chunk of computations and send it back to the headnode. This process
> repeats itself as many times as is possible and necessary, but the compute
> nodes always communicate to the headnode and not to each other?
> Please correct my above reasoning if it's wrong.
>
> Thank you!
>
> :-)
>
> Rion
>
> --
> "O wretched man that I am! Who will deliver me from this body of death? I
> thank God - through Jesus Christ our Lord! So then, with the mind I myself
> serve the law of God, but with the flesh the law of sin." Rom.7:24-25
>
>
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--
"O wretched man that I am! Who will deliver me from this body of death? I
thank God - through Jesus Christ our Lord! So then, with the mind I myself
serve the law of God, but with the flesh the law of sin." Rom.7:24-25
------------------------------------------------------------------------------
Crystal Reports - New Free Runtime and 30 Day Trial
Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing
server and web deployment.
http://p.sf.net/sfu/businessobjects
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