Jake Grimmett schrieb: > If I could ask question about 10Gbit ethernet.... > > We have a 70 node cluster built on Centos 5.1, using NFS to mount user home > areas. At the moment the network is a bottleneck, and it's going to get worse > as we add another 112 CPUs in the form of two blade servers. > > To help things breath better, we are considering building three new NFS > servers, and connecting these and the blade servers directly via 10Gbit to a > new core switch, the older nodes will stay with 1Gbit ethernet, but be given > new switches uplinked via 10Gbit to the core switch. > > Before I spend a great deal of money, can I ask if anyone here has experience > of 10GBit? Dell, HP, Supermicro, IBM (etc..) seem to be pushing the NetXen > PCIe cards, so I guess these drivers work...? As to media, although CX4 seems > cheaper than optical, I hear the cabling is nasty. And is the magical fairy > going to fix 10Gbit over cat6A anytime soon? > > any thoughts appreciated. > > Jake Jake, please note that the latest RedHat/CentOS-5.1 kernels have NFS performance issues - if these are (partly) responsible for the bottleneck then you may want to install a kernel which fixes the issue. Check out RedHat bugzilla 321111. HTH, Kay