sounds like NFS packets are being dropped. Are you using UDP?
Try using TCP... On Sun, 19 Jun 2005, Andreas Karlsson wrote:
Hello all, I am getting quite sick of my self and NFS. I?ve read many posts at forums.gentoo.org, I?ve googled, I?ve tested and tested and tested... No help could be found. The problem is not unique as it seems. I have an r/w speed against the NFS-server going from ~200kb/sec to 2mb/sec. I can?t predict or find a cause for the strange speed changes. I have three computers set up: Aquarius is my main work station (AMD XP 3200+, 1 gig ram) Leo is my file server (AMD 1700+, 630 meg ram) Aries is for TV-out (AMD 1700+, 512 meg ram) All connected via a switched 100mbit network. All have 100mbit NICs. Netperf is telling me this: aquarius hermes # netperf -H leo TCP STREAM TEST to leo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 89.61 And when I do the same from/to all others the results are quite the same. So, no problem with the network. Next up NFS. I have now tried so many different combinations at my /etc/fstab that I don?t know what is up and down: It currently looks like this: aquarius hermes # cat /etc/fstab | grep nfs leo:/home/files /home/hermes/philez nfs rw,users,auto,hard,intr,tcp,retrans=5,rsize=1024,wsize=1024 I?ve tried rsize and wsize from 1024 up to 32768 (1 through 32 * 1024). I?ve tried it in combination with sync and async. Here I find async working best. The file server (Leo) has a 120 gig HD with DMA enabled: leo linux # hdparm -t /dev/hdc /dev/hdc: Timing buffered disk reads: 88 MB in 3.02 seconds = 29.15 MB/sec So there should not be a I/O related problem either. I also run Samba on it, and when I am in Windows, filetransfers are as expected on 100mbit network (haven?t even mesured them as they work fine). Can anyone please give me any hints or advices on how to proceed with this problem? Best regards, Andreas Karlsson
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