Re: [gentoo-user] wakeup in virtualbox vm?

[Stroller]

On 18 Jul 2009, at 09:49, Konstantinos Agouros wrote:
> ... Is there a
> way that the guest recognizes the wakeup and than sets the time
> using ntpdate
> or based on the clock of the host-os which is ntp-synchronized?

I doubt it. I know little about virtualisation, so am ready to be  
proved wrong on that one.

I can only think to make a cron job to call an ntp pool on a regular  
basis. I think there may be a switch to ntp which allows it to make  
larger jumps.

The problem with this is that etiquette would tend to dictate not  
syncing with the upstream ntp server more than once per hour, so each  
time you wake it up your clock is going to be wrong for an average of  
45 minutes (allowing for Sod's Law). Solution that occurs to me is to  
run your own local ntp server on another machine which doesn't sleep  
(or on the host Mac itself) and sync with that; thus your cron job can  
run every minute to update the clock, and the time it takes to correct  
after waking will be insignificant.

Or sleep or hibernate the guest o/s before sleeping the host.

Stroller.



PS: shouldn't the correct virtualisation terminology be "host o/s" and  
"parasite o/s"? Methinks the marketing department were allowed to  
write the docs on this one.