> Hi Doug, > > I have heard of Open-MX before, do you need special hardware for that? We > are > currently using one GB network here on the cluster (for everything: NFS, > MPI...) and I would like to increase the performance for the parallel > codes I > am using (NWChem, cp2k, GAMESS) without dishing out too much money for IB > or > Myrinet as the cluster is too small for them (22 nodes right now). > > All the best
Open-MX will work over any Ethernet connection. If you have a recent kernel, it should work in an incremental fashion, that is, you can install it, build any MPI that supports MX and run it. It will co-exist just fine with TCP/IP traffic. Check the home page: http://open-mx.gforge.inria.fr/ I think the authors read this list. -- Doug > > Jörg > > On Thursday 10 December 2009 13:50:51 beowulf-requ...@beowulf.org wrote: >> Date: Thu, 10 Dec 2009 08:45:30 -0500 (EST) >> From: "Douglas Eadline" <deadl...@eadline.org> >> Subject: Re: [Beowulf] scalability >> To: "amjad ali" <amja...@gmail.com> >> Cc: Beowulf Mailing List <beowulf@beowulf.org> >> Message-ID: <51346.192.168.1.1.1260452730.squir...@mail.eadline.org> >> Content-Type: text/plain;charset=iso-8859-1 >> >> >> The performance of GigE can vary widely based on several >> issues: >> >> - chipset >> - driver >> - driver settings (interrupt coalescing etc.) >> - switch performance under load >> - switch manufacturer >> >> A well tuned GigE network is never as good as >> IB or Myrinet, but it can work well for some codes. >> You can also try using Open-MX instead of TCP >> for MPI communications. >> >> -- >> Doug > > -- > ************************************************************* > Jörg Saßmannshausen > Research Fellow > University of Strathclyde > Department of Pure and Applied Chemistry > 295 Cathedral St. > Glasgow > G1 1XL > > email: jorg.sassmannshau...@strath.ac.uk > web: http://sassy.formativ.net > > Please avoid sending me Word or PowerPoint attachments. > See http://www.gnu.org/philosophy/no-word-attachments.html > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- Doug _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
