Re: 30 instances on one host

spamdump_at_nospam.noway.nohow (Ed Stevens) wrote in message news:<3d11da94.298104932_at_ausnews.austin.ibm.com>...
> On Thu, 20 Jun 2002 05:54:40 GMT, joel-garry_at_nospam.cox.net (Joel Garry) wrote:
>
> >On Tue, 18 Jun 2002 04:01:17 GMT, Sean M <smckeown_at_earthlink.net> wrote:
> >>Alan wrote:
> <snip>>
> >I can additionally imagine a large org having a huge machine with a bunch
> >of different depts with their own instances, for various reasonable reasons.
> >(Not to mention unreasonable reasons, but I won't go there). I agree that
> >it would be pretty rare. Although, doesn't IBM run machines with thousands
> >of individual linux (linices?)...
> >
> It's been a few years since I've been involved with IBM mainframes, but when I
> was, their VM (Virtual Machine) operating system was regularly used to run
> multiple versions of their MVS (Multiple Virtual Storage) operating system, thus
> creating (voila!) multiple virtual machines on one physical box. And this was
> nearly 20 years ago on what was then considered to be a small to middling size
> machine in IBM's lineup. Given that mainframe technology hasn't exactly stood
> still while Wintel has slowly been re-inventing the wheel, I can quite easily
> see running several to many (you define "several" and "many") Oracle
> instances/databases on the right hardware.

I was thinking of this (warning, different meaning of instantiation here):

http://www-1.ibm.com/servers/eserver/zseries/os/linux/css/boyes.html TARGET=
>
> Only slightly off topic: A couple of years ago we were working on a new web
> based app that needed access to data on Oracle and DB2 databases and were using
> database links and the Oracle Transparent Gateway to get to the DB2 tables.
> After working with this for a while I asked why we didn't simply put all of the
> data on DB2. One of the hired consultants (a young MCSE) asked in all
> seriousness if I thought the mainframe could handle the load . . . .
>
> Of course, he WAS young and his entire lifetime experience with computers had
> been defined by Wintel.

This is quite on topic, given that people seem to want to advocate putting everything in one Oracle instance...

jg

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