On Tue, May 22, 2007 at 04:59:43PM +0200, Solon Luigi Lutz wrote: > KVS> Pawel Jakub Dawidek <pjd_at_FreeBSD.org> writes: > >>> I may reinstall at a later date as this is still very much a box to play > >>> with, but I gather there is no great gain from going 64 bit other than > >>> not having to play with PAE if you've got lots or RAM. > >> > >> I expect there is a huge difference in performance between i386 and > >> amd64. I'm currently setting up environment to compare ZFS on > >> FreeBSD/i386, FreeBSD/amd64 and Solaris. > > KVS> I've had precious little time to do more testing on our amd64-setup, but > KVS> it seems that vm.kmem.size_max is a 32-bit uint, so we can't really use > KVS> much RAM for ZFS. > > These are the figures for the following out-of-the-box 7.0 amd64 smp system: out-of-the-box means that you still have INVARIANTS/WITNESS turned on? > Athlon X2 3800, 1GB Ram, Asus M2N-SLI (modified), 24x 500GB (Samsung Spinpoint), > Areca ARC1280 running RAID-6. > > ZFS > -------Sequential Output-------- ---Sequential Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU > 8000 89555 85.6 188475 63.3 114048 36.9 95865 97.2 460375 64.0 41.2 0.3 > > Test was done on a 10TB volume. > > Since the machine is running in semi-production mode, I can't perform any UFS > tests anymore. The systems is running stable, and extensive > checksumming after 8TB data transfers didn't reveal any errors, > neither did a filesystem-stress-test. Checksumming with 'cfv' runs at a sustained > data rate of 290MB/s :) -- Pawel Jakub Dawidek http://www.wheel.pl pjd_at_FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am!
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