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
