[OpenAFS] WAN speed

Lars Schimmer l.schimmer@cgv.tugraz.at
Wed, 21 Mar 2012 21:56:19 +0100

On 21.03.2012 18:09, jukka.tuominen@finndesign.fi wrote:
> Hi,

> All communication must be encrypted.

Ok, so you have enabled the fs crypt function in OpenAFS?
That feature is about to change with new RX standard, but current crypt
function is:
1. very insecure
2. very very slow
3. very very CPU hungry
Over all: do not use it, more likely try to use VPN.

> Any suggestions how to go about trying to pinpoint the main cause of th=
> slow WAN speed? I=E2=80=99ve tried to google solutions to this for quit=
e a while
> without luck. Also, is there an easy and reliable method to test the
> effect of each change (a script hopefully)?

Depends on the values you did not wrote?
For me the slowness in WAN is about latency.
But in 100Mbit network cell servers and 100mbit client in WAN/Internet,
I get >2 MB/sec from my servers.

> Some base information about the test environment:
> - Ubuntu 10.4 based server & clients (hopefully virtualized during test=
> - The latest stable OpenAFS from the ppa repository (1.6.0)
> - Internet connection: 100Mb in, 5Mb out (according to speedtest.net)
> - Anything else needed?

Server configuration? Hardware?
Client settings, cache in client, cache size?

> Any help is greatly appreciated,
> br, jukka

Lars Schimmer
TU Graz, Institut f=C3=BCr ComputerGraphik & WissensVisualisierung
Tel: +43 316 873-5405       E-Mail: l.schimmer@cgv.tugraz.at
Fax: +43 316 873-5402       PGP-Key-ID: 0x4A9B1723