Re: Persistence

[Jonathan S. Shapiro]

On Mon, 2005-10-31 at 08:04 +0100, R. Koot wrote:
> William Grim wrote:
> EROS makes a snapshot every 10 minutes, so if the system crashed 9 
> minutes after the last snapshot you would, after a reboot, have the 
> system in the state it was 9 minutes before the crash. The only way I 
> can see to avoid these 'time jumps' would be making a snapshot on every 
> IPC calls, but I don't think that will be feasable performance wise.

Actually, we checkpoint every 5 minutes, but this is tunable, and the
performance is reasonable at 100 sec. intervals.

For comparison, UNIX is no better. How often do you think that bdflush
runs?

shap