On Wed, Sep 17, 2008 at 09:35:15AM +0200, Chris Fanning wrote: > Hello all, > > I'm using NFS to mount /home on a gigabit network. > /etc/exports on the server > /home 192.168.2.48/255.255.255.248(rw,no_root_squash,sync,no_subtree_check) > > /proc/mount on the client > home_server:/home /home nfs > rw,vers=3,rsize=32768,wsize=32768,hard,nointr,proto=tcp,timeo=600,retrans=2,sec=sys,addr=192.168.2.22 > 0 0 > > Write performance is not good. > > dd if=/dev/zero of=/home/testfile bs=16k count=16384 > 268435456 bytes (268 MB) copied, 45.0461 seconds, 6.0 MB/s > > If I change the export to async, it improves a lot. > > dd if=/dev/zero of=./testfile bs=16k count=16384 > 268435456 bytes (268 MB) copied, 3.6 seconds, 74.4 MB/s > > But the recommendation is not to use async, right? > > I've tried the same thing on two different servers (one xenified > kernel, one stock etch kernel) and two different clients (ubuntu 7.10 > y debian etch), with the same results. :( > Where should I start looking to fix this? What's the maximum sustained bandwidth to the server's disk? With enough server memory, a 268MB write could just be going straight to memory in the async case. --b. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ 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
