Re: NFS server slow when more clients access it
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On Wed, 9 Oct 2002, nate wrote:
> Lukas Kubin said:
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> > I'm having troubles with the speed of nfs-user-server, when the number of
> > computers booting root system from it exceeds the approximate number of
> > 5--7. The lower number is quite fast. The boot procedure of Debian "base"
> > then takes about 15 to 20 minutes (tested for 17 computers booting
> > together). Is it a feature of NFS or is something going wrong?
> >
> > Details:
> > 1. I boot kernel from floppy
> > 2. this is the lilo's append:
> > "rw nfsroot=CORRECT_IP_ADDRESS:/home/nfsroot,rsize=8192,wsize=8192
> > ip=::::::'dhcp'"
> > 3. The system init executes just the items in rcS of Debian base system
> > 4. I can't use the nfs-kernel-server since I couldn't access the
> > server's mounted drives when tried it
>
>
> any particular reason your using nfs-user-server over nfs-kernel-server?
> just curious is all.
Yes -- point #4 above. When I use the kernel server then the client can't
see directories into that was mounted something on the server. Let's say
I've mounted /dev/sdb1 as /home on the server. Then I can see the content
of /home on the server but not on the client.
> What kernel(on both client & server)?
2.4.18 on server and 2.4.19 to boot the client.
> I use nfs-kernel-server so it may not apply but how many nfs processes
> are you running? my /etc/init.d/nfs-kernel-server has this
> line in it:
>
> RPCNFSDCOUNT=16
> # Number of servers to be started up by default
>
>
> (I think I changed it from the default)
>
> I have noticed in my recent casual tests that the nfs server on
> redhat 7.3 is much more solid then the one on debian 2.2. I don't
> know if its the kernel(since the kernel runs the nfs server) or if
> its the userspace stuff(since rpc.statd is what dies on me in debian,
> it's a userspace program). But I've had rpc.statd die half dozen times
> if not more in the past week, and the redhat box(7.3) hasn't so much
> as hiccuped once. both servers only serve 2 clients, and only 1 client
> is used at a time, both systems have over a gig of ram so load is nil.
> linux isn't alone in having a buggy nfs. On solaris I came accross a
> NFS bug that was documented in sun's bug database more then 5 years
> ago and Sun still hasn't managed to fix it yet. It's a pretty bad
> bug that takes down the entire NFS system(though not the OS).
>
> nate
>
>
>
>
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