[Rivet] Running Rivet on the grid

[James Monk]

On 15 Oct 2008, at 12:53, Andy Buckley wrote:

> Incidentally, is it possible to submit a Grid job under, say, the  
> ATLAS
> VO with the condition that it must be sent to a CE which supports the
> Pheno (or CEDAR VO)?

I believe so.  I'll have a go at submitting a job using CEDAR that  
requires the ATLAS software be installed.

Like Frank said, the current tarball size is about 80 MB.  Anyone  
submitting jobs through ganga (most ATLAS grid users I guess) will be  
regularly uploading 10 MB tarballs to the grid anyway, so I think if  
we can reduce our tarballs by about a factor 10 there's nothing to be  
gained by installing.  Maybe we could split the libraries up into  
different generators, as has already been suggested.

All of the LHAPDF files are probably the single biggest item (lhapdf  
tarball from hepforge alone is 48MB), so if we can only wget the pdf  
we actually need then that's already a big decrease in size!  A simple  
way to do this would be to run rivet, parse the error message if no  
lhpdf file is found, download only that file and run again.  Perhaps  
some mechanism to find out the pdf file ahead of time could be added  
to a future release of LHAPDF?