Hello List,
A quick question: We've recently started backing up a venerable old
Alphaserver 1000A 4/266 running 4.0F by mirroring it to disk in a linux
box dedicated to this task via a point-to-point 100bT connection to a
second tulip card in the 1000A. Abruptly we were reminded by incredible
performance hits that transferring gigabyte files is a major impact on
interactive proceses/users on older machines. NFS is the conduit.
I did some reading, and it appears that lowering vm_ubcseqstartpercent
from 50 to 30 (at least for 4.0D) can be instrumental in relieving this
NFS congestion. Additionally, lowering ubcmaxpercent from the default of
100 to something like 80 might also be helpful. Comments? This old 1000A
also only sports 256M (swap is 729M). It's still called on to serve a few
dozen user X sessions at a time, host the Department's webpage, run matlab
for honours students finishing up their degrees (single-digit occurances),
etc.
And a related question: I'm looking at a retired AlphaStation 250 4/266
desktop machine, currently opened up in my office and filled with memory.
It appears to be precisely the same memory as used in our 1000A, which has
many empty banks. Could it be simply transplanted?
Thanks
Chris
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Christopher C Stevenson, C4063 office: (709) 737-2624
Dept. of Physics & Physical Oceanography fax: (709) 737-8739
Memorial University of Newfoundland
St. John's, Newfoundland, CANADA A1B 3X7
URL:
http://www.physics.mun.ca/~csteven
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"We are all in the gutter, but some of us are looking at the stars."
-- Oscar Wilde
Received on Thu Feb 14 2002 - 19:12:32 NZDT