Hi everyone, Our group is also interested in purchasing cloud GPU cluster. Amazon only supplies GPU cluster connected by 10Gb/s bandwidth. I notice this post but there is no reply by far. It would be nice if someone give any clue.
Regards, Simon 2018-03-06 1:31 GMT+08:00 Daniel Bauer <ba...@cbs.tu-darmstadt.de>: > Hello, > > In our group, we have multiple identical Ryzen 1700x / Nvidia GeForce > 1080 GTX computing nodes and think about interconnecting them via > InfiniBands. > > Does anyone have Information on what Bandwidth is required by GROMACS > for communication via InfiniBand (MPI + trajectory writing) and how it > scales with the number of nodes? > > The mainboards we are currently using can only run one PCIe slot with 16 > lanes. When using both PICe slots (GPU+InfiniBand), they will run in > dual x8 mode (thus bandwidth for both GPU and InfiniBand will be reduced > to 8 GB/s instead of 16 GB/s). Now we wonder if the reduced bandwidth > will hurt GROMACS performance due to bottlenecks in GPU/CPU > communication and/or communication via InfiniBand. If this is the case, > we might have to upgrade to new mainboards with dual x16 support. > > > Best regards, > > Daniel > > -- > Daniel Bauer, M.Sc. > > TU Darmstadt > Computational Biology & Simulation > Schnittspahnstr. 2 > 64287 Darmstadt > ba...@cbs.tu-darmstadt.de > > Don't trust atoms, they make up everything. > > > -- > Gromacs Users mailing list > > * Please search the archive at http://www.gromacs.org/ > Support/Mailing_Lists/GMX-Users_List before posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. > -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.