ZFS committed to the FreeBSD base.

Pawel Jakub Dawidek pjd at FreeBSD.org
Tue May 22 16:39:41 UTC 2007

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.
>               -------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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