Re: [Xen-users] Re : ha cluster with virtual machines as resources

[Dominik Klein <dk@xxxxxxxxxxxxxxxx>]

>   As far as i have played with Xen , You can dynamically allocate RAM to 
> a running VM but the OS inside the VM is NOT able to detect the 
> increased RAM and therefore cannot utilize it.
> If you reboot the VM , then on reboot it will show the increased memory. 
> ( Conditions like max mem are assumend to be satified)
If I'm not completely off here, Linux PVM domUs *do* see and utilize it.

Adding memory is not a big problem, reducing the amount of memory is 
one. Just imagine a process using 500 megs and you take away 200 of that 
while it is running. If you have 200 megs of unused memory, this should 
work, though.
Regards
Dominik

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