Re: [dc] draft-khasnabish-vmmi-problems-00.txt

[Melinda Shore <[e-mail]>]

On 01/20/2012 02:18 PM, Vishwas Manral wrote:
> An interesting thing to note is that the more the functionality you
> put in the hypervisor, the more you stress the single point of failure
> in the virtualized system.

Well, there are a few ways to look at it.  For example,
the fewer components you've got the larger the mean time
between failures.  But aside from that it's been a
general rule of thumb that you want to minimize the
impact of failed components on non-failed components
(the fate sharing principle).

At any rate the hypervisor (at least the ones with which
I'm familiar) basically *are* network devices - they
function as a switch, or even a NAT.  If you're going to
suggest that they can't be used to terminate control plane
sessions I hope there's a more compelling reason for it
than what has been offered so far.

Melinda