[Info-vax] History of DECSET / CMS

[Arne Vajhøj]

On 3/30/2020 9:05 PM, Dave Froble wrote:
> On 3/30/2020 4:28 PM, Andrew Shaw wrote:
>> The bottom line is that I really don't see a serious move away from
>> VMS for us in the immediate future. I am watching very keenly what
>> the good folks at VSI are doing as once the x86 solution becomes
>> viable then virtualization becomes a very real option for us. I'm
>> not sure if we will virtualise or not, we have some extremely
>> sensitive performance requirements that previous emulator solutions
>> have never been able to come close to, but this is a different
>> world now. Anyway, that's a decision for down the track.
> 
> That is one concern with VMs.  Timing can make or break an app.

It is difficult to guarantee performance for a VM running as guest
under another OS.

But for a VM running on a bare metal hypervisor without overallocating
CPU and memory (!) then it should behave like a physical box.

Arne