Hello Paolo, Thank you very much. Sent from Samsung Mobile
-------- Original message -------- From: Paolo Giannozzi <paolo.gianno...@uniud.it> Date: 17/01/2014 14:40 (GMT+00:00) To: PWSCF Forum <pw_forum at pwscf.org> Subject: Re: [Pw_forum] PARA_PREFIX AND PARA_IMAGE_POSTFIX On Fri, 2014-01-17 at 13:26 +0000, Elliot Menkah wrote: > I'm working with a cluster with a total of 128 cores > and I want to run a job(relax calculation) with pw.x using 64 cores. > > I'm a bit baffled with the number of processors to set for > PARA_IMAGE_PREFIX PARA_IMAGE_PREFIX is used by examples that run the phonon code using the "image" parallelization. If all you need is to run the self-consistent code, you do not need it. P. >? since it should be a product of > number of processors in PARA_PREFIX and the number of images in > PARA_IMAGE_POSTFIX. > > When i set -np of PARA_PREFIX to be 64 what should the ideal -np be for > PARA_POSTFIX? > > 64x64 = 4096 > > the total cores are 128, so 4096 exceeds it. > > Any help or explanation on that is appreciated. > > Thank you. > > Regards, > > Elliot > -- Paolo Giannozzi, Dept. Chemistry&Physics&Environment, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222 _______________________________________________ Pw_forum mailing list Pw_forum at pwscf.org http://pwscf.org/mailman/listinfo/pw_forum -------------- next part -------------- An HTML attachment was scrubbed... URL: http://pwscf.org/pipermail/pw_forum/attachments/20140118/de3e5de5/attachment.html