ZFS committed to the FreeBSD base.

Solon Luigi Lutz solon at pyro.de
Tue May 22 14:59:49 UTC 2007

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:

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

Thanks for the good work!

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