Re: Why doesn't Oracle care about Linux as IBM does?

Hi,

That's correct. I'm no expert on 390 and I probably was in highschool when these decisions were made.. but here's what I know (to be taken with a grain of salt):

The 390 is built for shared disk support (that whole parallel sysplex thing). There is a lot of hardware support to run shared disk on an OS/390. On Unix or NT (nearly(?)) none of this support is there. It has to be emulated with software and this software is different on different platforms.

I don't know what the scalability limits are on the Sysplex, but I imagine there must be sone. This might be another reason to go MPP.

Note that it was the DB2 390 engineers who decided to go MPP on DB2 Distributed platforms. So it wasn't some division ignoring good advise from another, neither was it learning from mistakes.
Just the insight that what works on 390 does not work just the same on UNIX/NT. That also explains why the DB2 on Unix/NT engine has a completely different codebase than DB2 390 and DB2 400 (where DB2 is the OS).

Cheres
Serge Received on Wed Aug 15 2001 - 11:16:17 CDT