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Home -> Community -> Mailing Lists -> Oracle-L -> Re: What are the major difference between Oracle RAC and Parallel server?
0) Cache fusion extended to write-write (8i OPS had read-write)
1) Locking mechanisms are "self-tuning" ("Dynamic resource mastering" - Use
the defaults!)
Sorry for the late reply, but the "major" differences are:
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 RealApplication 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 aredifferent
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]
> 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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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Don Granaman INET: granaman_at_cox.net Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Sun Feb 24 2002 - 10:13:19 CST
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