On 14.02.10 18:28, Jonathan Belson wrote:
The machine is a Dell SC440, dual core 2GHz E2180, 2GB of RAM and ICH7 SATA300
controller. There are three Hitachi 500GB drives (HDP725050GLA360) in a raidz1
configuration (version 13). I'm running amd64 7.2-STABLE from 14th Jan.
First of all, I tried creating a 200MB file on / (the only non-zfs partition):
<..snip..>
Hi,
FYI,
I Just made the same tests, on a FreeBSD 8.0-STABLE #4: Thu Dec 3
19:00:06 CET 2009, 4GB RAM, zpool comprised of:
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
tank 1.81T 1.57T 251G 86% ONLINE -
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror ONLINE 0 0 0
ad10 ONLINE 0 0 0
ad12 ONLINE 0 0 0
zpool upgrade
This system is currently running ZFS pool version 13.
I'm getting near-to-hardware performance on all tests, i.e. 94MB/s
minimum. Tried with 200MB, 2000MB, 4000MB and 8000MB files repeatedly.
All wonderful.
E.g.:
dd if=/tank/testfs/testfile.dat bs=1m of=/dev/null count=8000
8388608000 bytes transferred in 83.569786 secs (100378479 bytes/sec)
marx# dd if=/tank/testfs/testfile.dat bs=1m of=/dev/null count=8000
8388608000 bytes transferred in 78.234149 secs (107224378 bytes/sec)
Did repeated writing and reading. I have NO ZFS-related tunables at all
in /boot/loader.conf. All left to self-tuning and defaults as advised
since 8.0.
kstat.zfs.misc.arcstats.memory_throttle_count: 0 at all times.
Regards,
Lorenzo
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