Bogdan Costescu wrote: > > Old: Athlon MP 2200+, Tyan S2466MPX mobo, 2.6.19.3 kernel, 512Mb RAM > > I used to have the exact same hardware as cluster nodes (but with dual > CPU, whether you also have duals is not clear from your post)
These are single CPU machines. > and > tried to convert 2 of them to small file-servers - same problem of > disk + network simultaneous activity. After benchmarking, I gave up - > this was almost 2 years ago and I don't have the exact numbers > anymore, but a single PIV 3GHz on a consumer-grade mainboard was able > to provide significantly better performance for the same task. Was athcool running on these? I've done some more benchmarking with athcool on/off, and it changed the write speed for the dd generated 512MB file from just under 18MB/sec to 31 MB/sec. Even with that change, there is clearly something else going on in the network + disk department, since the "expected sequential" rate only changes from 7.1 to 8.5MB/sec. The "hdparm -tT" results were around 520MB/sec cached reads in either case, but the timed buffered disk reads went from 24MB/sec to 44MB/sec (both with large variances, but not THAT large.) Thankfully this is entirely irrelevant to those of you who have long since retired these older Tyan systems. Regards, David Mathog [EMAIL PROTECTED] Manager, Sequence Analysis Facility, Biology Division, Caltech _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
