"Blair Adamache" <badamache_at_2muchspam.yahoo.com> schreef in bericht
news:camsut$dv1$1_at_hanover.torolab.ibm.com...
> I thought SAP R2 was written for MVS, and SAP R3 was written first for
> Oracle, and then moved to DB2 (on MVS, UNIX and Windows).
>
> Certainly the SAP of the early 1990's bought into all the IBM
> cross-platform fun (Strategic Systems Architecture, perhaps even Common
> User Access). Early versions of SAP were also written for Adabas
> (perhaps R1?), but the SAP we know today was Oracle-centric, and SAP has
> invested quite a bit to change this.
>
> In my recollection, JD Edwards was never a mainframe software vendor.
> Their backgrounds is IBM S3/X and AS/400, which are known as mid-range
> or minicomputer systems.
>
I don't know about the other apps., but SAP R2 indeed was written for MVS.
It wasn't build for relational dbms's though, but relied upon VSAM.
Because SAP wanted to support relational dbms's, they came up with SAP R/3.
Initially (iirc) they developed their own dbms for this, but with C/S and
distributed db's becoming more and more important, it seemed only logical
for them to switch to Oracle for their development efforts.
Later on, SAP decided to go with DB2 for appl. development, mainly because
Oracle did become a big competitor for them, and DB2/UDB apparently was
mature enough to be a viable alternative for them.
Nothing to do with SAP first (technically) preferring Oracle and now DB2,
just commercial/marketing reasons, imho. As long as customers use their
apps. and not Oracle's, SAP doesn't really care which db-platform they use
for it.
Received on Tue Jun 15 2004 - 16:36:56 CDT
