On Thu, 2003-12-04 at 20:02, Harry Putnam wrote: > I lack much experience with nfs but I suspect I should be seeing much > better transfer rates here. Wondering if a few posters could post a > timed transfer of know amount of data > > This is from a rh9 to yarrow (fully updated) I'll show exports file > at the end: > > root # du -sh $rea/News/agent/nntp/enews* > 169M /home/reader/News/agent/nntp/enews.newsguy.com > > root # time cp -a $rea/News/agent/nntp/enews*/ /EXP_root > real 12m26.120s > user 0m0.340s > sys 0m13.990s > > So 169MB in 12 1/2 minutes. This is inordinately slow speed, have you tried scp/ftp/smb to transfer the same file? This will help narrow the problem down from an NFS issue to a network issue. What does tail -f /var/log/messages show? I had link errors in the past due to what I can only assume was a failing network card (had neither the skill not patience to figure out if it was or not). To give you an idea of transfer rates at work. time dd if=/dev/zero of=/home/douglas.furlong/test bs=16k count=16384 The above results in a 256MB file being transfered, I get better results at home, as I am suffering NFS performance issues at work which I am in the middle of eliminating. real 0m54.698s user 0m0.030s sys 0m0.980s real 1m5.801s user 0m0.010s sys 0m0.880s real 1m0.551s user 0m0.050s sys 0m1.000s The quickest there is 54 seconds to transfer the 256MB file. > cat /etc/exports: > / reader(rw,async,insecure_locks,no_root_squash) > /home reader(rw,async,insecure_locks,no_root_squash) > /var reader(rw,async,insecure_locks,no_root_squash) > /mnt/exp reader(rw,async,insecure_locks,no_root_squash) > /usr reader(rw,async,insecure_locks,no_root_squash) > /tmp reader(rw,async,insecure_locks,no_root_squash) A more useful piece of information would be the mount commands that you use. Placing rsize=8192,wsize=8192 in the options part of the mount provides better perfomance than the default values, however I am guessing they are already there as they are listed in the man pages for the mounts. neon:/mnt/raid/home /home nfs retrans=10,wsize=8192,rsize=8192,intr,hard 0 0 Try using the nfsstat command, you can get some information there with regards to errors and "retransmits" saying how many times the packets need to be resent. I hope this gives you some help. Doug
