[Info-vax] WHY IS VSI REQUIRING A HYPERVISOR FOR X86 OPENVMS?

[Arne Vajhøj]

On 1/1/2021 7:17 AM, Phillip Helbig (undress to reply) wrote:
> In article <memo.20210101114248.3580A at jgd.cix.co.uk>, jgd at cix.co.uk
> (John Dallman) writes:
>> In article <98286971-2cf9-4732-a390-e2fb2e467f1fo at googlegroups.com>,
>> ultradwc at gmail.com (D W) wrote:
>>> As for hardware failures I would I think OpenVMS clustering is a
>>> far superior solution than the VM solution.
>>
>> Yes, in some ways. But the VM solution is familiar to most companies' IT
>> departments, and VMS clustering is not.
> 
> My guess is that almost all existing VMS customers use clustering,

I doubt that.

There must be a lot standalone Alpha and Itanium systems out there.

>                                                                    and
> that almost all future VSI customers are current VMS customers.

Short term: probably yes.

Long term: *hopefully* not.

>> Also, modern x86-64 hardware is /fast/, and a single VMS instance should
>> be able to do the work of several Alpha boxes, or a couple of Itaniums.
> 
> But increased power is only one of many reasons for clustering.

True.

>> In the common situation where VMS usage has been shrinking as a
>> proportion of a company's IT, replacing several old machines with a
>> single VMS VM will be attractive to management.
> 
> Unless they need a solution where the application can survive the loss
> of a data centre.

That really has not much to do with VM vs non-VM or VMS vs non-VMS.

Data center redundancy is a common concept.

Arne