Hi, Most of what I know about Infiniband came from the notes at http://www.hpcadvisorycouncil.com/events/switzerland_workshop/agenda.php (or John Hearns in his previous life!).
On Mon, 2011-11-07 at 00:01 +0100, Vincent Diepeveen wrote: > Do i need to connect both to the same switch? > So in short with infiniband you lose 2 ports of the switch to 1 > card, is that correct? You probably want to just connect one port to a switch and leave the other one unconnected to start with. > CARDS: > Do all switches work with all cards? > Can you mix the many different cards that are out there of 4x > infiniband? > If not, can you mix from mellanox the different cards theirs? So mix > from 1 manufacturer cards? They will (or at least should) all work to a point but depending on what combination you are using you may not get some features. If you want an easy life keep it all from the same manufacturer > Does infiniband 4x work for x64 machines? The 4x bit is the number of links aggregated together. 4x is normal for connections from a switch to a node, higher numbers are sometimes used for inter-switch links. You also need to note the data rate (eg SDR, DDR, QDR etc). > DRIVERS: > Drivers for cards now. Are those all open source, or does it require > payment? Is the source released of > all those cards drivers, and do they integrate into linux? You should get everything you need from the Linux kernel and / or OFED. > MPI: > The MPI library you can use with each card is that different > manufacturer from manufacturer? Free to download > and can work with different distro's? Does it compile? Is it just a > library or a modified compiler? There are quite a lot to choose from but OpenMPI is probably a good starting point. Hope that's some help... Rob _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
