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Re: LDM/GEMPAK NFS Question

Considering the origins of NFS, it probably makes sense... Still, I have yet to see a problem attributable to NFS mounts here.
My LDM data does come in on one machine, and has to traverse a router or 2 to get to my Gempak machine for processing. I'll be most interested in performance after I can phyically colocate the 2 machines on the same subnet. 

Robert Mullenax wrote:
I have used RH Linux boxes as well with out any huge problems, but they are still noticeably 
slower than Solaris x86 boxes doing the same
thing, especially as load and file size increases.



-----Original Message-----
From: Gerry Creager N5JXS
To: Robert Mullenax
Cc: 'Patrick O'Reilly'; ldm-users@xxxxxxxxxxxxxxxx; gembud@xxxxxxxxxxxxxxxx
Sent: 11/14/2003 8:57 PM
Subject: Re: LDM/GEMPAK NFS Question

Then again, the only problem I can attribute to using nfs on RH9 is some

remaining virus traffic.
I'm running v3 here on Mesonet. We do some "interesting" cross-mounts without problems. 

gerry

Robert Mullenax wrote:


Under RH 6.2, we would have to specify NFS version 2, but this
version of RH supports version 3.  I would maybe look at NFS
versions to see which version each box is running.

As an aside, based on a lot of NFS use here..
I will say that you will be much happier in the long run
if you just ran Solaris x86 instead of RH 9. NFS was and continues to be a problem on Linux. You will never get 
the same NFS performance with a Linux NFS server as you
would with a Solaris box (SPARC or x86).

Robert

-----Original Message-----
From: Patrick O'Reilly [mailto:patrick.oreilly@xxxxxxx]
Sent: Friday, November 14, 2003 12:29 PM
To: ldm-users@xxxxxxxxxxxxxxxx; gembud@xxxxxxxxxxxxxxxx
Subject: LDM/GEMPAK NFS Question


Hello,

I am switching my LDM machine from a Sun Solaris 8 machine to a PC


running


RedHat 9.  This PC will feed the data via NFS to 4 Sun Solaris 8


machines,


who in turn run GEMPAK scripts on the data and post imagery to the


web.  My


prior setup had the 4 Suns mounting the NFS share of another Sun and


things


went well.  I just made the switchover, i.e. made the PC/Redhat


machine the


NFS server to the 4 Suns, and the mount went fine.  The problem is,


now the


GEMPAK scripts take a very long time to run on the Suns.  A simple


script


takes a couple minutes where it used to take 20 seconds.  I am


assuming that


this is because of the communication between the PC and the Suns via


the NFS


mount.  Are there any NFS settings I can use to make the data read


faster?


Is this even the problem?  Has anyone faced this problem?  Any wisdom


on the


situation would be helpful.  Thanks!

Patrick
_______________________________________
Patrick O'Reilly
Meteorological Decision Support Scientist
The STORM Project - University of Northern Iowa
patrick.oreilly@xxxxxxx  ~  ph: 319-273-3789
http://www.uni.edu/storm

"No trees were killed in the making of this e-mail...however,
a large number of electrons were horribly inconvenienced."





--
Gerry Creager -- gerry.creager@xxxxxxxx
Network Engineering -- AATLT, Texas A&M University  
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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