More zfs benchmarks

[Lorenzo On The Lists]

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