Quoting Bruce Allen <[EMAIL PROTECTED]>: > I'd like to know the fastest that anyone has seen an NFS server run, over > either a 10Gb/s ethernet link or a handful of link aggregated > (channel-bonded) Gb/s ethernet lines. > > This would be with a small number of clients making large file sequential > reads from the same NFS host/server. Please assume that the NFS server > has 'infinitely fast' disks. > > I am told by one vendor that "NFS can't run faster than 100MB/sec". I > don't understand or believe this. If the server's local disks can > read/write at 300MB/s and the networking can run substantially faster than > 100 MB/s, I don't see any constraint to faster operation. But perhaps > someone on this list can provide real-world data (or say why it can't > work).
I built some servers a couple of years ago and was able to run NFS at about 100 MB/s. The system was Dual socket Xeon, single gigE link, 1 Gb/s fibre channel, XFS filesystem, jumbo frames. The limiting factor was that the local filesystem could only do 100 MB/s. Jumbo frames increased the performance from 60 MB/s to about 95 MB/s. I know those servers could have gone faster if I had another gigE link and faster disk. Going above 100 MB/s shouldn't be a problem. If you want some other evidence, go look at www.agami.com. They are a relatively new storage applicance company. They claim their servers can provide up to 1000 MB/s over NFS (quad socket opteron, linux+xfs, lots of disks). I don't know if they tweaked the kernel or NFS to get this performance, but from the hardware they use I believe they could get that performance. It certainly should be able to sustain more than 100 MB/s. I am not endorsing the product, I am just pointing out some data that may be able to help you to determine what you can/should get out of a Linux Based NFS server. Craig > > Note: I am free to use modern versions of the NFS protocol, jumbo frames, > large rsize/wsize, etc. > > Cheers, > Bruce > _______________________________________________ > Beowulf mailing list, [email protected] > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
