Jean Figarella wrote:
My old nfs server was an old dual Xeon machine running debian.
Everything worked fine. Then I switched over to a new Penguin Computer
Altus 2600 (if Im not mistaken) with two Dual-Core AMD Opteron(tm)
Processor 2210 and 4GB of ram. CentOS4.4 is running on it.
Now here is the thing, this nfs server is exporting "/home" and all
workstations mount the /home dir via fstab. Ever since I switched to
this new server running CentOS4.4 everyone on the network gets 5-20
second freezes sporadically trough the day. In other words if I am
browsing the net using Firefox, because all the user's options and cache
are stored on ~/.firefox, it freezes for the 5 to 20 seconds at a time.
After running some test, this happens when big chunks of file are being
copied via nfs to the server. So as an example if user1 has a 700Mb iso
image in /tmp and he decides to copy this to his home dir (for whatever
reasons, this is not important), every user in the network will
experience 5 to 20 seconds freezes while the file is being copied. Now
if the same file is being scp-ed to the same user's home dir on the
server, the freezes do not happen.
Now I have tried many different nfs server options and other nfs client
options. I also set up a test nfs server with centos4 and 5 where I am
the only user, and while copying big chunks of date, nfs freezes (hangs)
too.
Here is my /etc/exports:
/home *domain.com(rw,root_squash,sync,no_subtree_check,no_wdelay)
Here is how client workstations mount the export in the fstab
fshome:/home /home/ nfs rsize=8192,wsize=8192,intr 0 0
Am I mis-configuring the nfs server of clients? Is there anything I am
not doing right?
If anybody has any suggestions, I would appreciate it very much.
Thanks,
Jean Figarella.
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I think I found the issue here. Its the sync option in the server. I am
running it with async instead and so far so go. But still any other
suggestions are welcome.
Jean
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