Oracle Versions and RAC

We are considering running Oracle 10g and 11g RAC on the same cluster.. wondering if anyone has tried it before ? If yes, any recommendations ?
Thanks,
G

user10255282 wrote:
Cost is the big factor. We have certain environments that have no intention of moving to 11.. but some do. Cost moves around. This is simply trading one kind of cost for another. Especially if all environments are covered by an Oracle Support contract. Then the cost is not Oracle related.
But that ultimately is a PHB decision.
Instead of buying dedicated RAC clusters for the offending ones.. its a thought to run 2 versions on the same servers... ofcourse with the higher CRS.However, yes you can run run a mix ... as Dan says, not necessarily recommended. MUST use highest available CRS and be very careful that the CRS supports all version of the DB.
(And plan on having your interconnect flooded.)
I highly recommend testing the bejazis out of it to verify your shop can indeed handle the configuration.

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Hello all,
I am having a boring version problem here. We, recently, changed our Oracle 8i (8.1.7) for a Oracle 9i (9.2.0.6).
We have several Java/J2EE applications running on JBoss and accessing that Oracle Database.
We havenÂ´t changed the JDBC driver version and we started to notice that a lot of cursors have been stucked and are not been closed.
Searchin in Google and metalink weÂ´ve decided to update ou JDBC driver version from classes12_8.1.7.1.jar for this ojdbc14.jar (9.2.0.5).
After this change we started to have a lot of ClassCastExceptions, specially in this case:
When my app call this procedure:
MY_PROC(USR IN VARCHAR2, ID OUT NUMBER)
in my Java app, using such code:
CallableStatement call = conn.prepareCall("{ call MY_PROC(?,?) }",
ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
call.setString(1, user);
call.registerOutParameter(2, OracleTypes.INTEGER);
call.executeQuery();
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Recall we use Java / JBoss / Oracle 9i.
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The client will be using Oracle9i as their database (which has Real Application Clustering), and also Oracle9iAS as their application servers. Their architecture is 3-tier, and development will be done on the J2EE platform. They are using Oracle's JDeveloper for development.
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Looking at this approach, we feel this is not very much 3-tier anymore, because the business logic is tightly coupled with the database. We foresee that there will be issues with independence of business logic and database access layers, flexibility, portability, modularity, maintainability and scalability.
What we would like to find out is:
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you can clone the app server to scale for users/sessions (plus the scalability from the oracle RAC) that is a double whammy.
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if the business logic is database independent. so you can switch to any other database.
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approach, if you want to port the app to another database vendor, you can do with minimal effort (compared to rewriting the pl/sql).
the predomoinant factor in a web app is how are you going to manage persistance of a user session.
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Thanks.

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Product      Oracle Server - Enterprise Edition
Product Release      11gR2 RAC
Product Version      11gR2 RAC
Tier      Server
Tier Product      N/A
Tier Product Version      N/A
Platform      Microsoft Windows x64 (64-bit)
Platform Version      2008 R2
Certification Status      Certified
Expand All | Collapse All
Expand to view Notes Notes
Expand to view Certification Notes Certification Notes
Edited by: rui_catcuddler on Jul 22, 2010 10:02 AM

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