On Tue, Jun 24, 2008 at 12:17:24PM +0200, Adrian von Bidder wrote: > Hi again, > > Thanks for your replies (You too, Trond) The custom around here is to leave everyone on the cc: line. > > On Monday 23 June 2008 21.28:36 you wrote: > > [... NFS performance ...] > > > In what way exactly is it sluggish? > > Starting KDE, opening documents, sometimes also closing oo.org and saving > documents takes several seconds longer than on local disk. "close" on nfs is an operation that requires a round-trip to the server and waiting for the disk to commit any writes made before the close, so if you've got to do a lot of those it can take time. Fooling with the journaling on the exported filesystem may help. > Certainly network latency (especially with these silly lots of small config > files) takes some time, but I'm still surprised. At the same time, I don't > have data to compare a "known good" NFS against ours, so perhaps NFS is > indeed so slow? > > > > > > tcpdump shows many "reply ERR 1448" etc. msgs whenever NFS activitiy is > > > going on (both stat like with "find /home" or read/write with dd) > > > > I'm afraid I don't know how to read that tcpdump output. > > tcpdump "-vvv" doesn't give more information on these packets; at the same > time wireshark doesn't show anything suspicious except tons of wrong TCP > checksums caused (I hope...) by offloading. Yes, that's normal. > I'll have to look if I can get > the raw traffic at the network switch to check this (but I think with 30% > and more wrong tcp checksums, traffic would completely break down so I'm > quite confident here.) > > > Slightly different topic: is there an NFS related mailing list I can > subscribe to? This one is apparently closed for new subscribers, and the > bounce instructs me to send mail to majordomo@xxxxxxxxxxxxxxx which ^^^^ vger Where'd the typo in that address get introduced? > bounces :-( Reading others' NFS postings might just give me more ideas on > where to look. Should be: http://vger.kernel.org/vger-lists.html#linux-nfs > TODO today: play around with NFSv4 on the shaky assumption that nfsv3 is > actually working but net latency is killing my performance. Delegations *might* help if the problem is really open latency. --b. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ NFS maillist - NFS@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/nfs _______________________________________________ Please note that nfs@xxxxxxxxxxxxxxxxxxxxx is being discontinued. Please subscribe to linux-nfs@xxxxxxxxxxxxxxx instead. http://vger.kernel.org/vger-lists.html#linux-nfs -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
