[K12OSN] untarring over NFS

[Jack]

On Thu, 2004-11-11 at 17:10 -0600, Les Mikesell wrote:
> On Thu, 2004-11-11 at 16:29, Jack wrote:
> > I'm using an NFS server for all the home directories.  I've noticied
> > that if I have say a 20 meg tar file and I try to untar it, it takes
> > about a minute.  However when ssh directly into the NFS server and
> > perform the same function it works almost instantly.  I thought NFS was
> > chatty but geez! 
> 
> You probably have NFS working in synchronous mode.  That means that
> every update when you create and write to files will wait for
> the physical write to disk to complete.  The theory is that you
> could reboot the server in the middle of that tar operation and
> the client would just wait and pick up where it left off without
> losing anything.  When you do it directly on the server, disk
> writes are buffered and the program doesn't wait unless the buffer
> is full.  You shouldn't see anywhere near the same delay when
> you are only reading files.  If write speed is more important than
> safety (how often does your server reboot anyway?) you can use
> the async mount option.
> 
> ---
>   Les Mikesell
>     les at futuresource.com

Thanks that seemed to cut the time in half at least but I'd like it to
be faster.  How about using nfs v4 .  Seems fc1 does not support v4 so
I'll have to upgrade.  Is it worth it?

Jack