sysbench / fileio - Linux vs. FreeBSD

[Adam PAPAI]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 6/5/10 1:04 PM, Bruce Cran wrote:
> On Sat, 5 Jun 2010 12:50:15 +0200
> Stefan Miklosovic <miklosovic.freebsd at gmail.com> wrote:
> 
>>> /var : ufs with softupdates
>>> /usr/obj : zfs with checksums disabled
>>> /usr/src : zfs with compression enabled
>>> /home   : zfs with compression disabled and checksums enabled
>>>
>>> I ran a test with a blocksize of 8KB and 16 threads.
>>>
>>> /var       : 25.2MB/s
>>> /usr/obj : 64.8MB/s
>>> /usr/src : 386.3MB/s
>>> /home   : 60.3MB/s
>>
>> Do I understand it well? It seems that zfs with compression enabled on
>> /usr/src with 8KB block size and 16 threads performs 386.3MB/s which
>> is about 6 times better than debian5? I am thinking about this image
>> http://tech-blog.wooh.hu/~wooh/debian_vs_freebsd_io_16_seqwr.png
> 
> Yes - on one run it even hit 500MB/s. I suspect, however, that the
> benchmark isn't accurate because it won't be writing typical data.
> Instead it's probably using a buffer that compresses very well.

Hm.. My ZFS tests showed me the same results. With compression it's
pretty fast. An application benchmark will give us typical data write,
so I'll run PgSQL benchmarks on the ZFS pool as well.


- -- 
Adam PAPAI
NETIDEA Informatikai Szolgáltató Kft.
http://www.netidea.hu
E-mail: wooh at wooh.hu
Phone: +36 30 33-55-735 (Hungary)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iQEcBAEBAgAGBQJMCjJiAAoJEGq0EWvh5uiIKFMH/1dP4OZGAMiBNSoRqGFfnZ5B
/vtf5do2t3JRbjfYi2HyNn8gXss4xRDPouVmftl2OglIXA77hMIyIcjyoWnHGTBc
M1WnnNDz1wIb8EYSl9MYKAjQA1wGsYd4UImd1MqOtZfSuOht6hTLoSiAnC1xMLtk
9vgFUtMok8XclPqL08J/dWs39+HwhSaooRnLEx7IYLSgFis7vQtJjOaWWG3LUADw
QsivcCSjBBoQ7LD9WXN5prmlwt+CMBU/F1yyMaJXa0bNI7AM+hh5Mix03P4HAKEz
4Z92lcmLXzSVnllA0tAJvAwEPtk4laP6yzM9egStDNvxONLueQVLXfY8gvukQ2k=
=MVI2
-----END PGP SIGNATURE-----