nfs slow behaviour

[John Thompson]

On Fri, 2004-07-16 at 14:54, Chadley Wilson wrote:
> 
>>So I had working nfs and now I have a broken nfs, mmm.
>>
>>The server worked all night long no problems,
>>
>>My setup is as follows:
>>
>>Celeron 2.4 Gig with 512 mb ram on a msi 7005 maiboard on board
>>everything,
>>I have added thre pci intel pro 100 + network cards and fill the pci
>>slots.
>>I created a bond between the three intel cards (eth1 eth2 eth3). and the
>>onboard (eth0) is a route to another network 
>>ie 
>>eth0 = 196.25.100.120
>>bond0 = 192.168.10.2
>>
>>When I start nfs it takes a long time time more than 5 five minutes.
>>I have checked dmesg and /var/log/messages there are no entries refering
>>to nfs or nfsd. 
>>It was working perfectly until I added a new dir which I have now
>>removed, but I still sit with this problem.
>>Exportfs does show the shares, but exportfs -r or -a just hangs for more
>>than five minutes too.
>>
>>I have tried rebooting and restarting each service one by one
>>netfs
>>nfs
>>xinetd
>>network
>>etc...
>>Where else could I look for the cause of the problem.
>>
>>I have tested the bond0 device thoroughly I just copied two gigs of isos
>>over in under 3 minutes, I don't think thats the problem.
>>
>>The service --status-all |grep nfs shows the service is running
>>
>>here is some output.
>>
>>[root at preload root]# service --status-all |grep nfs
>>nfsd (pid 3210 3209 3208 3207 3206 3205 3204 3203) is running...
>>[root at preload root]#
>>
>>
>>[root at preload home]# exportfs
>>/diskb/ifc1     <world>
>>/diskb/ifc2     <world>
>>/home/fc1       <world>
>>
>>Then try mounting and
>>
>>[root at chadlin root]# mount preload:/fc1 test/
>>mount to NFS server 'preload' failed: server is down
>>
>>any ideas?

No solution, but I see a similar problem here using FC1.  My /home 
directories are nfs-mounted from a FreeBSD (5.2.1) machine and as you 
say it can take from 5 to 30 minutes for the mount to succeed -- when it 
is done from /etc/fstab:

amayatra:/home                 /home                   nfs rw 0 0

I've actually commented out this line in /etc/fstab because it takes so 
damn long to mount. No errors are displayed.  The nfs server shows the 
mount request being received, but it takes fer-frickin'-ever to complete 
on the client.  None of the other machines on the network (running 
FreeBSD and NetBSD) have this problem.

Curiously, if I leave the line commented out and mount /home manually 
("mount amayatra:/home /home") it is instantly mounted; no delay.

I've tried changing when the nfs filesystems are mounted in init, but it 
doesn't seem to matter.

It's kind of a PITA because I have to mount /home manually when I 
reboot, but I don't reboot all that often so I've just put up with it.

-- 

-John (john at os2.dhs.org)