Hi, I'm trying to run some benchmarks on a file server to test the effect of different filesystems, hardware vs software raid, putting the journal on a separate device, etc. The machine has 24G of RAM so I'm running
/opt/iozone/bin/iozone -c -C -g 48g -n 48g -i 0 -i 1 -i 2 -q 1m -y 4k -a The trouble with this is that it's taking an absolute age - the first random read has been going for about 6 hrs so far. I'm therefore wondering about using either -e (to include a flush) or -I (to bypass the cache) with smaller file sizes. Will this still give a useful comparison? Presumably with -e the read data is still potentially read from cache? Any thoughts? Should I be trying a different approach altogether? Thanks, Rob _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
