On Sat, Aug 12, 2000 at 01:54:53AM -0700, Eyal Traitel wrote:
> I can suggest you to check:
>
> 1. Network cards and switches/routers between the Linuxes and the
> filers - check for 100mbit full duplex settings - check in the
> filer and the linux for nfsstat and netstat errors.
Good plan. It sounds to me like either an NFS tuning issue or the
dual-processor, dual-ethernet locking problems that caused the
Mindcraft benchmarks to be so horrible. You might actually get better
performance under 2.2 if you dump the extra processor and buy a couple
more servers (relatively cheap if you're going with, say, VA/Linux).
> 2. I don't have experience with NFS on linux, but I know that there
> were a lot of nfs changes in the last kernels, so even if it
> worked OK before, maybe you should just consider to upgrade the
> linuxes - it is never bad in linux anyway... :)
> You'll probably get faster NFS that way, since nfs was moved to
> kernel level I think in 2.3 or something...
Ok, there's actually a kernel (no pun intended) of good advice, here,
but there's also a lot of danger in what you're saying. Here's the
detail:
The 2.3 series is an UNSTABLE development series. It is intended for
kernel developers and those who want to test out new code only. The
2.4-test series is the beta for the initial roll-out of 2.4, the next
stable kernel series based on 2.3.
If what you're running into is SMP-related you could very likely
benifit from using 2.4, but IT IS ONLY IN BETA, so you would be
crawling out on quite a limb here. At the very least, you would need
to do some serious Q/A before deploying.
That said, your best first step here is to see if you have the same
problem with one processor. If you don't, you know you're running into
the SMP/ethernet locking problem and that your only options are
single-processor or 2.4. Check the kernel mailing list and see if I'm
wrong. There might be other ways to address this....
-- Aaron Sherman Systems Architect HighWired.com -- The global high school community http://www.highwired.com300 North Beacon Street Watertown, MA 02472 (617) 926-1850 x238 (617) 926-1861 fax asherman@highwired-inc.com / ICQ#43677395 / Y!ajstrader
"We had some good machines, but they don't work no more." -"Faded Flowers" / Shriekback
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