Re: [Optorsim-devel] About the Job Configuration File

[Jonathan M. <jon...@bs...>]

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Yes, this is exactly what I expected (and understood). Great! Thanks :-)

Caitriana Nicholson escribió:
| Hello Jonathan,
|
| The list of files given in the filetable is the list of 'logical file
| names'. That is, for each file name given there may be more than one
| replica of the file existing on the grid, i.e. more than one 'physical
| file name'.
|
| In the situation you describe, each instance of job1 would access file1,
| but they may not all be the same copy of file1. For example, if there are
| 3 copies of file1 on different grid sites, each of them could be accessed
| by different instances of job1.
|
| Whether there is more than one copy / replica of file1 would depend on the
| distribution of files at the beginning of the simulation, and then on
| subsequent replication to different sites according to the replication
| algorithm which was chosen.
|
| Hope that answers your question - let me know if it is still unclear.
|
| best wishes,
|
| Caitriana
|
|
|
|
| On Tue, 26 Feb 2008, Jonathan Marti wrote:
|
|
| Hi good afternoon!
|
| I have a doubt regarding the Job Configuration File. As far as I understand, the
| filetable section is a list of files which are going to be accessed by the jobs
| defined in the jobtable. But, from the jobtable, and also the rest of the Job
| Configuration File, it looks like jobs defined there are some kind of "generic
| types of jobs". For instance, in the jobselectionprobability section we define
| the probabilities of execution for each "kind of job"
|
| So, let's say we have just one job defined in the jobtable, job1, and a file in
| the filetable file1 which is accessed by job1. When the simulation is running
| and many jobs of kind job1 are executed...do they all share file1? Or on the
| contrary, the file1 is just like a file definition (or kind of), and every job
| job1 accesses its own file1? (so that there is no file sharing among jobs job1).
|
| I guess OptorSim implements the first option (all jobs job1 share file1), but
| thinking about "nonsharing" or intermediate solutions (maybe configurable) makes
| sense as well.
|
| Thank you very much!
|
|>
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| ----------------------------------------------------------------------------------
| Caitriana Nicholson		       			c.n...@ph...
| Particle Physics (Experimental)   	     	   	 Tel. (+44/0) 141 330 6435
| Department of Physics and Astronomy 		   	 Fax. (+44/0) 141 330 6438
| University of Glasgow    		     http://ppewww.physics.gla.ac.uk/~caitrian/
| ----------------------------------------------------------------------------------


- --
- ------------------------------------------------------------------------
Jonathan Martí
Storage Systems Research Group  - Computer Sciences Department
Barcelona Supercomputing Center - Centro Nacional de Supercomputación
www   : http://www.bsc.es
email : jonathan.marti(at)bsc.es
phone : (0034) 934134051
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