[Info-vax] What does VMS get used for, these days?

[Simon Clubley]

On 2022-11-15, Jan-Erik Söderholm <jan-erik.soderholm at telia.com> wrote:
> Den 2022-11-15 kl. 15:11, skrev Simon Clubley:
>> On 2022-11-14, Arne Vajhøj <arne at vajhoej.dk> wrote:
>>> On 11/14/2022 1:59 PM, Simon Clubley wrote:
>>>> On 2022-11-11, Arne Vajhøj <arne at vajhoej.dk> wrote:
>>>>> On 11/11/2022 7:40 PM, Scott Dorsey wrote:
>>>>>> =?UTF-8?Q?Arne_Vajh=c3=b8j?=  <arne at vajhoej.dk> wrote:
>>>>>>> On 11/10/2022 9:51 AM, Scott Dorsey wrote:
>>>>>>>> As software becomes more and more expensive, I think the need to have an
>>>>>>>> efficient operating system that provides database features in the kernel
>>>>>>>> becomes more important.
>>>>>>>
>>>>>>> Database in the actual OS kernel or just database shipping with the
>>>>>>> OS distribution?
>>>>>>>
>>>>>>> It is not uncommon to put application functionality in the
>>>>>>> kernel today, but I am not keen on the idea.
>>>>>>
>>>>>> I think in the kernel.  Maybe not in the top ring, but in a ring below it.
>>>>>> I want fast database access, I want rapid transaction turnover, I don't care
>>>>>> necessarily about realtime operation or any direct UI other than for
>>>>>> administration, or ever specifically making deadline.  I'm thinking of a
>>>>>> specialized database engine.
>>>>>
>>>>> I don't think I have ever heard about that for database.
>>>>
>>>> Rdb ? :-)
>>>
>>> I thought that was in user space not kernel space (P0 vs S0 in
>>> more VMSish teminology).
>>>
>> 
>> I thought the core Rdb components ran in Executive mode. Was I wrong
>> about that ?
>> 
>> Simon.
>> 
>
> Maybe so, but the question was if Rdb run in the kernel, wasn't it?
>

If you read Scott's requirements above, you will see he was talking about
it being part of the kernel, but running at a ring below kernel mode.
That description fits executive mode perfectly.

Simon.

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