> From: [email protected] [mailto:discuss- > [email protected]] On Behalf Of Adam Levin > > 2) It used to be the case that 1Gb Ethernet, even using LACP or other > aggregation protocols, couldn't keep up with FC. FC is a more efficient > protocol than NFS. However, now that we have 10Gb Ethernet, it's really no > longer an issue.
I disagree bigtime. Even if you run iscsi over 10Ge, it still has to go through all the mac/ip/application layers, not to mention, the 10Ge switch, probably buffering, store and forward, etc. If you have a network such as Infiniband or Fibre Channel, you're able to skip all those and use DMA directly, which greatly decreases latency. Also, the speed of even the slowest IB network is around 40 Gbit, while ether maxes out at 10Gbit. Whether using SSD or HDD, the sustainable throughput of each individual device is around 1Gbit. So the max performance of a 10Ge network is on-par with 10 disks. Which would be a pathetically small SAN. _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
