[CentOS] NFS /home freezes.
Jean Figarella
jfigarella at vecna.com
Wed May 16 18:59:56 UTC 2007
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.
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
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
More information about the CentOS
mailing list