Re: re-export NFS mounted disk to be NFS mounted?

Thanks Yuri,

Other than NFS, what else can I do, I heard a lot about NFS's  
performance, but I just don't know an alternative yet (AFP doesn't  
work that well on a server as what I read from mail lists, and from  
trying).

Guess I will go to local disk solution.

CY

On Mar 23, 2009, at 12:15 PM, Yuri Csapo wrote:

> AFAIK that is not possible on Linux with the stock kernel nfs  
> server. It *should*  be possible with the userspace server, but I'm  
> not sure it's supported. Maybe someone who has actually done it (as  
> opposed to playing with it) should comment.
>
> OTOH it doesn't seem like a good idea anyway... NFS's performance is  
> really bad and what you're doing will multiply bad x 2. I know  
> sometimes you need to work with what you have but if your cluster is  
> in any way I/O sensitive you should think about getting some local  
> disk space for it, at least.
>
> Yu Chen wrote:
>> Hello,
>> I have a cluster, the disk space is on a Xserver, it's NFS  
>> exported, and mounted on the cluster's head node without problem  
>> (mounted on /mnt/nfs), then I exported the "/mnt/nfs" directory,  
>> then tried to mount it on the nodes in the cluster (mount -t nfs  
>> headnode:/mnt/nfs /mnt/tmp), it gave error: mount ... failed,  
>> reason given by server: Permission denied.
>> my Xserver nfs exports entry has this: /Volumes/DataRAID  -alldirs - 
>> maproot=nobody -sec=sys -network my.headnode.network -mask  
>> 255.255.255.0
>> my headnode mounted /Volumes/DataRAID on /mnt/nfs then exported as  
>> nfs exports entry:
>> /mnt/nfs 10.0.0.0/255.255.255.0(rw,sync)
>> Anybody has any suggestions?
>> Thanks in advance.
>> CY
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> -- 
> Yuri Csapo
> Academic Computing & Networking
> Colorado School of Mines
> CT-256
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