Thank you for your suggestion.
All the nodes have intel on board gigabit NICs and are connected to a gigabit switch(Dell PowerConnect 5324). Anyway, this problem is not very serious because I still can mount the NFS manually by cexec.
Andy
Frank Crawford <[EMAIL PROTECTED]> wrote:
Andy,
Going back a bit, I have sometimes had this problem when the NIC was
autonegotiating and it too a while. Do you have gigabit NICs and a
100Mbit switch or something like that.
The only way I could get around it was to put in a delay of about 30-40
sec after the network started and before anything tried to use it.
Frank
On Tue, 2006-01-31 at 18:39 -0500, ANDY SIU wrote:
> Hi Michael,
> Yes, the head node is booted completely before the compute nodes. I
> have also tri ed to reboot one compute node when the rest of the
> cluster is running. So the /home in the head node was already using by
> the other compute nodes. However, the rebooted computer node still
> could not mount the /home and /nfstmp, except if I manually executed
> "mount -a".
> Thanks!
> Andy
>
> Michael Edwards <[EMAIL PROTECTED]>wrote:
> The head node is booted completely before the nodes boot?
> Thats what
> the problem sounds like. If it was a problem with the fstab
> "cexec
> mount -a" wouldn't work...
>
> On 1/30/06, ANDY SIU wrote:
> > Hi,
> > Does anybody know why the compute nodes cannot mount NFS
> file systems during
> > boot up?
> > My cluster is Intel P4 EM64T runnin g FC4 x86_64. I am using
> OSCAR-4.2.1.
> > The compute nodes are booted after the headnode is booted
> up. The error is
> > something like "pbs_oscar NFS server is down". I have to
> manually mount the
> > NFS on each compute nodes by "cexec mount -a".
> >
> > The /etc/fstab file on the compute nodes contains:
> > /dev/sda6 / ext3 defaults 1 2
> > /dev/sda5 swap swap defaults 0 0
> > /dev/sda1 /boot ext3 defaults 1 2
> > /dev/fd0 /mnt/floppy auto noauto,owner 0 0
> > none /dev/pts devpts defaults 0 0
> > none /proc proc defaults 0 0
> > nfs_oscar:/nfstmp /nfstmp nfs rw 0 0
> > nfs_oscar:/home /home nfs rw 0 0
> >
> > The /etc/exports file on the headnode contains:< /DIV>
> > /home 192.168.1.1/255.255.0.0(async,rw,no_root_squash)
> > /nfstmp 192.168.1.1/255.255.0.0(async,rw,no_root_squash)
> >
> > Thank you
> > Andy
>
>
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