[Beowulf] Building new cluster - estimate

Gerry Creager gerry.creager at tamu.edu
Thu Aug 7 00:10:26 EDT 2008


Chris Samuel wrote:
> ----- "Robert G. Brown" <rgb at phy.duke.edu> wrote:
> 
>> And even on Linux machines, NFS has been, well, "functional"
>> is a good way to describe it.
> 
> It actually seems to work pretty well these days, our
> general config is:
> 
> 1) No automounter
> 2) Hard mounts (so jobs just hang if they loose contact)
> 3) NFS over TCP (NFS over UDP is sooo 1990's :-))
> 4) Jumbo frames (9000 byte MTUs) on the NFS network
> 5) NFS file server has hardwired fsid's to prevent stale file handles on a reboot
> 6) Debian, not RHEL on the server
> 7) XFS for /home on the server

Speaking of jumbo frames, I'm seeing a problem on a Broadcom 57xx 
chipset on CentOS 4.3, 2.6.9-67 kernel (yeah, I know) and a tg3 driver. 
  I can't make the thing recognize the ability to use jumbo frames. 
Anyone got a fix?
-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
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