Re: HURDNG : Which type of OS design could we have to think nowadays ?

[Jonathan S. Shapiro]

On Fri, 2006-08-11 at 22:12 +0200, Ernst Rohlicek jun. wrote:
> As I see it, there are a few options:
> 
>   - Not saving caps and re-issuing caps every machine reboot and server 
> restart; processes are giving their children the caps they need.
>   - Reconstruct environment.
>   - Save all (if I remember correctly, EROS was doing this continuously 
> in the background).
> 
> The third has a performance impact; though not as big as it is 
> subjectively assumed in the first moment, it is still there and I'm 
> still unsure what the advantages are...

There is a performance impact to save *anything*. The measurements show
that the EROS implementation is *faster* than a conventional file system
approach in normal use. There is a research paper analyzing this and
explaining why it is true.


shap