Some ideas for FreeBSD
jerrymc at msu.edu
Fri Feb 8 15:43:11 UTC 2008
On Thu, Feb 07, 2008 at 04:09:13PM -0800, Jason C. Wells wrote:
> Heiko Wundram (Beenic) wrote:
> >Am Donnerstag, 7. Februar 2008 07:32:16 schrieb Jason C. Wells:
> >>Norberto Meijome wrote:
> >>>But I agree with Wojciech..do you really want to use swap files?
> >>One could mount an md filesystem and then use that as swap. That way
> >>you wouldn't need to use any disc space. As a plus, the performance
> >>would be way better than disc.
> >Ahem, sorry, that's just plain stupid. Either the md system is backed up
> >by RAM (in which case you don't need the swap anyway; why'd you want to
> >access RAM by putting it in a swap on an md in RAM?), or it's backed up by
> >swap, in which case you have a chicken and egg problem.
> Mmm, yes. That is quite a pickle. But a chicken or an egg would still
> be inferior to an md backed swap. :)
md backed swap is just using memory which, if you hadn't wasted it
by making it md, it might obviate the need for swap at all - anyway
it would not be a faster system if the md had to be swapped out. It
just adds another layer of interferrence.
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