Sorry for the late reply, but the "major" differences are:
0) Cache fusion extended to write-write (8i OPS had read-write)
1) Locking mechanisms are "self-tuning" ("Dynamic resource mastering" - Use
the defaults!)
2) Major re-write of a *lot* of the internals
3) No more "DLM" - its now "GCS" & "GES" (separate lock & enqueque services)
4) Oracle is pushing it like they never pushed OPS - much better marketing!
5) Oracle Parallel FailSafe (OPFS) has been enhanced and renamed to Real
Application Clusters Guard
6) "Lock mastering" is now "Resource mastering"
7) "Lock database" replaced by "Global Resource Directory"
8) There are now five (!) RAC manuals instead of 8i OPS's two
9) Most of the v$ and GV$ views have changed and many of the names are
different
...ad infinitum...
The RAC concepts manual reveals a lot, especially the "What's New in Oracle
Cluster Software" section:
http://download-west.oracle.com/otndoc/oracle9i/901_doc/rac.901/a89867/whats
new.htm#983402
The "Real Application Clusters Deployment and Performance " manual was
written by someone who actually knows the stuff. Some of the detailed
descriptions in the "SQL Statement Execution in Real Application Clusters"
section of the RAC Deployment and Performance" manual are quite revealing as
to how cache fusion actually works. I can't say I completely agree with ALL
the installation recommendations, but I understand why they make them
(K.I.S.S. principle).
IMHO, the best "starting point" for the 9i docs is:
http://download-west.oracle.com/otndoc/oracle9i/901_doc/nav/docindex.htm
In the end, RAC is the next step in the evolution of OPS, but perhaps the
magnitude of the delta does justify a name change (e.g. humanoid -> human).
[Note that this is a slight divergence from my previous position.
"Consistency is the virtue of the small mind." - Confucius]. However, I
still think that the main motivation for the name change was to avoid the
all-too-frequent "garlic necklace and raised cross" reaction to any
suggestion of using "Oracle Parallel Server".
-Don Granaman
[OraSaurus]
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Monday, February 11, 2002 2:58 PM
server?
> ORACLE 9i claim it support ORACLE RAC (real application Cluster). After I
> saw couple of Oracle RAC papers, I still confuse between Oracle RAC and
> Parallel server. Can someone give me ideal what are the major difference
> ORACLE RAC and Parallel server?
>
>
> Thanks.
>
>
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