[OpenAFS] Extremely poor write performance.

jon+openafs@silicide.dk jon+openafs@silicide.dk
Fri, 17 Jan 2003 10:51:46 +0100

On Fri, Jan 17, 2003 at 09:58:46AM +0100, Rubino Gei? wrote:

> True, but I'd like to provide adequate performance for my useres, so
> accepting such a bottelneck as file creation is my setup, is no good at all.
> Rigth? We should ask ouerselfs: whats the reason? 
> I have tested the following: network saturation, server load. Non of them
> are in critical numbers if you do mass deletes. So my clues are:	
> 	1. guess: maybe it's the network latency. 
> 		- contraidication: on 10Mbit we got the same numbers but 5
> ro 10 times higher ping turnarounds. 
> 	2. guess: a flaw in the server code or linux.
> 		- guestion: how can I profile the fileserver? I want to know
> where he is consuming time / waiting. How is this done for a client?

what about too many interrupts ?
How is the underlying filesystem performance ? might the problem be there ?
Test it on the server and see what you get.