[coyotos-dev] Couple of potential-someday-user questions

[David A. Braun]

----- Original Message ----- 
From: "Jonathan S. Shapiro" <shap at eros-os.org>
To: "Coyotos development discussions" <coyotos-dev at coyotos.org>
Sent: Tuesday, February 08, 2005 10:43 AM
Subject: Re: [coyotos-dev] Couple of potential-someday-user questions


[...]

> > Would adding some NVRAM make it easier to store all relevant
capabilities
> > (up to the recent split second) and simplify the process persistance
issue
> > that's being discussed on this list ?  Would it be acceptable to require
an
> > NVRAM component in PCs for running Coyotos ?
>
> It would make some things more efficient, but it wouldn't let us beat
> the snapshot phase, which is the real problem. Requiring PCs to have
> NVRAM in order to run EROS/Coyotos is definitely not an option.

other than speed and capacity what's the difference between NVRAM and disk?
If the amount of data needed to "store all relevant capabilities" is small
enough to store in NVRAM then the time needed to write this to disk is
probably small enough to ignore especially in comparison to the disk I/O
needed to finish the checkpoint. After all your aren't taking snapshots or
whatever all that often.

dave