Dear Ashkan, I don't know if I am correct, but you could try reducing the number of cores. This way I guess you will have more RAM to be used per core.
Regards, On Wed, Jul 23, 2014 at 10:47 AM, ashkan shekaari <shekaari at gmail.com> wrote: > dear siddheshwar > > i ran a supercell system made of 48 atoms on a computer server with > 120 cores and 6 GB of RAM , but it didn't work . my calculations > failed , it needs more than 6 GB of RAM . > > On 7/23/14, siddheshwar chopra <sidhusai at gmail.com> wrote: > > Dear Ashkan, > > How much large RAM do you mean? Is it 4GB in total or more? I can add > > another 2GB hence. > > > > Regards, > > > > > > On Wed, Jul 23, 2014 at 6:50 AM, ashkan shekaari <shekaari at gmail.com> > > wrote: > > > >> yes , but you can not run any supercell calculations or defected systems > >> . > >> > >> for these calculations you should have a large amount of memory (RAM) . > >> > >> On 7/22/14, siddheshwar chopra <sidhusai at gmail.com> wrote: > >> > Dear Users, > >> > I am new to QE and really need an estimate about the computational > >> > resources needed to run magnetic, phonon, optical and band structure > >> > calculations for light, medium and heavy atoms of around 60 atoms > >> > supercell. I currently have a dual core 2.7 GHz processor with 2GB > RAM, > >> > HDD=250GB. Please suggest me so that I can run calculations without > any > >> > memory of processor issues. > >> > I have Windows XP and also Linux mint installed on the same machine. I > >> have > >> > also increased the virtual memory per partition. > >> > I also now how to make an external USB drive work as system RAM. Will > >> that > >> > help me? > >> > > >> > Kind Regards, > >> > > >> > -- > >> > *Dr. Siddheshwar chopra,* > >> > > >> > > >> > *M.Sc., Ph.D (Physics)Assistant Professor (Physics),* > >> > *Amity University, Noida, India.* > >> > > >> > >> > >> -- > >> Best wishes > >> Ashkan Shekaari > >> _______________________________________________ > >> Pw_forum mailing list > >> Pw_forum at pwscf.org > >> http://pwscf.org/mailman/listinfo/pw_forum > >> > > > > > > > > -- > > *Dr. Siddheshwar chopra,* > > > > > > *M.Sc., Ph.D (Physics)Assistant Professor (Physics),* > > *Amity University, Noida, India.* > > > > > -- > Best wishes > Ashkan Shekaari > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum > -- *Dr. Siddheshwar chopra,* *M.Sc., Ph.D (Physics)Assistant Professor (Physics),* *Amity University, Noida, India.* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://pwscf.org/pipermail/pw_forum/attachments/20140723/6334101c/attachment.html
