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

[Simon Clubley]

On 2021-01-01, Jan-Erik Söderholm <jan-erik.soderholm at telia.com> wrote:
>
> With SAN, you can have HBS between datacenters without running VMS-Cluster.
> Just shadow multiple disks from different SAN systems at different sites.
> Or let the SAN systems hande the mirrowing of your data.
>

That takes care of the data.

What about the coordination between application and operating system
instances at different sites so that another one picks up the load after
the original instance fails ?

How is the original instance blocked from resuming operations if it
recovers so that you don't have two instances of the application or
operating system trying to update the same data at the same time in
an uncoordinated way ?

In other words, what is the SAN version of the DLM and the VMS clustering
protocols ?

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.