Re: [Condor-users] mixed pool: NFS and non-NFS directories

[Alain Roy <roy@xxxxxxxxxxx>]

On Mar 21, 2008, at 2:59 PM, Ian Stokes-Rees wrote:
> I am running OSG on a small (20 node) Condor pool with NFS and  
> shared home directories for VOs.  I am interested in finding out if  
> it is possible and practical to add into the pool other execute  
> nodes which don't have shared NFS or user home directories.  Can  
> anyone offer any tips or suggestions regarding this?

Condor is happy to run without a shared filesystem. If a user doesn't  
request file transfers for a job but, it is assumed that the files are  
on a shared filesystem. Condor detects if you share a filesystem by  
looking at FILESYSTEM_DOMAIN. Details are in the manual: I can point  
you to specifics if you need them. If a user specifics that files  
should be transferred "if needed", then FILESYSTEM_DOMAIN is used to  
decide if you are on the shared filesystem, or if the files need to be  
transmitted.

Out of the box, the OSG Globus installation assumes that Condor is  
using a shared filesystem, and when it submits jobs to Condor it  
doesn't tell Condor to transfer files. There is an alternate Condor  
job manager that does tell Condor to transfer files. Some VDT-specific  
documentation is at:
http://vdt.cs.wisc.edu/releases/1.8.1/notes/Globus-CondorNFSLite-Setup.html

I don't think it is a documented solution in OSG, but several sites  
are using it with success. You'll need to install it from the VDT  
cache instead of the OSG cache.

-alain