You are probably systematically loosing some fragments of every
big udp packet.
( You might want to look for an old paper / technote called
"Fragmentation considered harmful" .. I think from DEC)
I had the same problem with some 3com cards and a switch.
Probably can be fixed by using the driver from 3com but I
did not find the time to look into it yet.
Try setting the rsize and wsize to 1024 for a quick & dirty fix.
( To avoid fragmentation )
> I knew that nfs under linux was not the best, but this is ridiculous.
> I'm trying to set things up at work so that /home is kept on a server
> and nfs mounted on all the desktop machines. It was noticeably
> slower, but I figured it would be.
>
> Then last night I ran some tests. Following the advice of the NFS
> HOWTO I ran:
> time dd if=/dev/zero of=testfile bs=16k count=4096
> The result was that it took 8 minutes to copy 64MB between two 500MHz
> Pentium IIIs on a 100-baseT switched network. I know NFS is slow, but
> that's ridiculous!
>
> WITH speeds so slow, I figure that I must be doing something wrong, so
> I didn't bother trying to fiddle with the rsize and wsize options.
> They are currently the defaults.
>
> The server is running RedHat 6.1 with the supplied kernel. Does that
> include the NFS patches?
>
> The client is running 2.2.14 with the autofs patches. Do I need to
> put in the NFS patches, too? Will it make that much difference?
>
> Thanks in advance,
>
> --Michael
> --
> To unsubscribe: mail ">majordomo@ale.org with "unsubscribe ale" in message body.
>
--
To unsubscribe: mail ">majordomo@ale.org with "unsubscribe ale" in message body.