[Info-vax] VMS on x86-64 timescales, was: Re: x86 Update 4/22/19

[Simon Clubley]

On 2019-04-30, Jan-Erik Söderholm <jan-erik.soderholm at telia.com> wrote:
> Den 2019-04-30 kl. 16:46, skrev Dave Froble:
>> 
>> Well, if in testing serious problems are discovered, then no, one doesn't 
>> use the product.  But usually, the final testing is "use in production".
>> 
>> Nor will testing be just an abstract project.  The goal will be to use the 
>> systems in production.
>> 
>> So I don't really understand your comment?
>> 
>
> Maybe semantics, but one could call the activites done in a test
> environment for "tests". Then many have a separate environment (still
> not production but very similar) where "User Acceptance" activites
> are done together, and in many cases, by the end users.
>

This is absolutely 100% true. By the time you get to production,
you should be past the testing stage. If you are going into
production with the idea that is the final test, then that's
the wrong mindset IMHO.

> When going to the true production systems, things shoulld work but
> one obviously has to be prepared if something pops up. In that case
> it is usually some functionallity that was missed, not any true
> technical issues, that should have been caught earlier...
>

I agree.

You will probably find small issues in production that got missed
during the various levels of testing (that happens no matter how
much you might wish it didn't) but they should be small enough to
be addressed in one way or another rather quickly.

As a last resort, if something major did get through testing and all
the way into production, then there should be a backout plan to revert
to the last known good application version or system configuration.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world