Hi Daniela, I have not discussed this with Ivan yet, but I believe he is considering any of the Brunel ArcCEs. I could it ready quickly. Maybe defining one for target (dc2-grid-25) would make it easier for debugging. Important points: - the gridpp VO seems to be bag with many communities using it. They would all be entitled to 8 cores jobs... - I'll inform Peter that I have opened 8 cores to all gridpp. He will not oppose if we can deal with the above. Thanks, Raul ________________________________ From: Daniela Bauer <daniela.bauer.grid@googlemail.com> Sent: 06 July 2017 11:32:14 To: Ivan Reid Cc: Raul Lopes; gridpp-dirac-users@imperial.ac.uk Subject: Re: [Gridpp-Dirac-Users] Multi-core jobs in ganga/dirac You can't -- this is the bit we need to work out within dirac, so that it reads the JDL correctly and then matches the queue. Which queue is it ? Regards, Daniela On 6 July 2017 at 11:28, Dr Ivan D. Reid <ivan.reid@brunel.ac.uk<mailto:ivan.reid@brunel.ac.uk>> wrote: On Thu, 6 Jul 2017, Daniela Bauer wrote: But have you got a queue and for which VO, gridpp ? For gridpp, yes, but how do I specify a queue? Cheers, Daniela Thanks, ivan On 6 July 2017 at 10:57, Dr Ivan D. Reid <ivan.reid@brunel.ac.uk<mailto:ivan.reid@brunel.ac.uk>> wrote: On Thu, 6 Jul 2017, Daniela Bauer wrote: Hi Ivan, we haven't tested multi-core job submission in our dirac instance yet, but if you have a use case (and a site that will support it!) we can look into it. OK, Daniela. I've been testing the application locally, and could have a job script ready later today. It should run at Brunel, as that's where the data are. I've attached the plot of speedup vs cores that I've just obtained -- the single-core time is ~125 minutes. You can see that there's definitely no real advantage in going beyond eight cores. A sysadmin might prefer four... Regards, Daniela Cheers, ivan On 6 July 2017 at 10:16, Dr Ivan D. Reid <ivan.reid@brunel.ac.uk<mailto:ivan.reid@brunel.ac.uk>> wrote: On Thu, 6 Jul 2017, Mark Slater wrote: As regards Ganga, there isn't a specific option for multicore but there is a 'diracOpts' field in the Dirac backend which you could use. However, I don't know what dirac option you'd need to specify MC so I can't help any more than that I'm afraid! Cheers, Mark, at least it's a keyword to gwgl on! On 06/07/2017 08:12, Dr Ivan D. Reid wrote: Is there a way to tell ganga/dirac that your jobs are multi-core, so that sites can direct them to appropriate queues, or do you just take pot-luck? -- Ivan Reid (ivan.reid@[brunel.ac.uk<http://brunel.ac.uk>|cern.ch<http://cern.ch>]) Engineering, Design & Physical Sciences CMS Collaboration, Brunel University London. Room TOWD405 CERN, Room 40-1-B12 -- Ivan Reid (ivan.reid@[brunel.ac.uk<http://brunel.ac.uk>|cern.ch<http://cern.ch>]) Engineering, Design & Physical Sciences CMS Collaboration, Brunel University London. Room TOWD405 CERN, Room 40-1-B12 RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005 WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon) KotPT -- "for stupidity above and beyond the call of duty". -- Sent from the pit of despair ----------------------------------------------------------- daniela.bauer@imperial.ac.uk<mailto:daniela.bauer@imperial.ac.uk> HEP Group/Physics Dep Imperial College London, SW7 2BW Tel: +44-(0)20-75947810 http://www.hep.ph.ic.ac.uk/~dbauer/