Very useful answer, thanks Dave. It is very important to know that I will not have big trouble with the Linux driver.
Cheers, Andrea 2013/10/2 David MacMahon <[email protected]>: > Hi, Andrea, > > We used a dual port CX-4 Intel NIC for the previous PAPER correlator X > engines: > > http://www.intel.com/content/dam/doc/product-brief/10-gigabit-cx4-dual-port-server-adapter-brief.pdf > > That NIC's PCIe interface only ran at 2.5 GT/s and x8 width, which works out > to an 8/10B encoded data rate of 20 Gbps. This gives an unencoded (i.e. > user) data rate of 16 Gbps, which is less than the 2 x 10 GbE ports could > theoretically handle. Fortunately, we only needed 12.8 Gbps per card (6.4 > Gbps per interface) so this limitation was not an issue for us and the card > (and Linux driver) performed fine for our application. > > The E10G81GT2CX4 card you mention is also 2.5 GT/s x8 width, but the PCIe bus > speed will not be a bottleneck since it has only a single 10 GbE port. > > Hope this helps, > Dave > > On Oct 2, 2013, at 4:33 AM, Andrea Mattana wrote: > >> Hi Casperites, >> >> Does anybody have experience with this Intel card??? >> >> I would like to buy a new one but the two listed in the CASPER Wiki >> (https://casper.berkeley.edu/wiki/Recommended_10_GbE_Hardware) are not >> available >> on local sellers. >> >> Do you have tested any other cards? >> >> Thanks to all. >> >> Andrea >> >> >> -- >> Andrea Mattana >> >> I.N.A.F. - Istituto di Radioastronomia >> Radiotelescopi di Medicina >> Via Fiorentina, 3513 - 40059 Medicina (Bo) >> Tel. 051/6965834 Fax. 051/6965810 >> > -- Andrea Mattana I.N.A.F. - Istituto di Radioastronomia Radiotelescopi di Medicina Via Fiorentina, 3513 - 40059 Medicina (Bo) Tel. 051/6965834 Fax. 051/6965810
