[OpenAFS] speed of OpenAFS fileserver

[Lars Schimmer]

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Frank Burkhardt wrote:
> Hi,
>=20
> On Sat, Feb 23, 2008 at 02:18:23PM +0100, Lars Schimmer wrote:
>=20
> [snip]
>=20
>> Is there any limit built in?
>> Has anyone reached more than 10 MB/sec from debian filserver package?
>=20
> Yes - we have :-) :
>=20
>   Reading a single large file: 55.5 MiB/s
>   Writing a single large file: 63.5 MiB/s
>=20
> This is the configuration:
>   * G33-DS3R mainboard
>   * Intel Core2Quad Q6600 , 2.4GHz
>   * 2GB of RAM
>   * 1GBit/s ethernet
>   * 10x 750 GB in a RAID-6 on an Areca 1231 controller
>   * ext3 as /vicepa
>   * Debian Etch + latest updates
>   * Kernel is vanilla 2.6.23.8, results are nearly the same for 2.6.24.=
0
>=20
> The given performance values were measured between two of those servers
> which were connected via a single low-cost GE-switch.

Did you make any special config line options to the filservers in BosConf=
ig?

I tested right now with a temp fileserver on my workstation (debian
kernel 2.6.21 and Athlon X2 6000+) and got rates above to 26 MB/sec to a
windows 1.5.32 client.
To one of my other servers I just get 8 MB /sec.
To another linux athlon XP client I get 11 MB/Sec with a load of 40% for
fileserver on the server.

Could it be a CPU/kernel issue?
e.g. with kernel 2.6.21 >100MBit, with kernel <2.6.19 just 100MBit max?

And the load makes me wonder.
On a 3 Ghz Xeon I get a load of 90% with 10 MB/sec (2.6.17 kernel), on a
athlon 6000+ (3 Ghz) I get a load of 40% at 26 MB/sec (2.6.21 Kernel).
Is the Xeon SO much worse? Or the old kernel?


> Regards,
>=20
> Frank

MfG,
Lars Schimmer
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TU Graz, Institut f=FCr ComputerGraphik & WissensVisualisierung
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