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  • HA Events vs. TAF with RAC and ODP.NET

    Lately I had a question in this Blog about an ORA-25408. My first thought was, that TAF and HA events should not be mixed. In order to confirm this, I wrote a small application with 3 connection possibilites 1. Normal connection 2. TAF connection with or without HA events 3. Connection with HA events...
    Erstellt in Urs Meier - Blog on IT (Weblog) von Anonymous am 12-05-2007

  • Oracle Critical Patch Update October 2007 on RAC

    Hi, Since all molecules of the CPU October 2007 are marked as 'online applicable' to RAC (nice wording, it means a rolling upgrade is possible, not that all instances stay online during the patch...), I decided to test it. Clusterware did not have to be patched, by the way. Rolling upgrade worked...
    Erstellt in Martin's Technique Blog (Weblog) von Martin Wunderli am 10-31-2007

  • RAC FAN and FCF

    After the successfull RLB tests with RAC FAN events we re-tested the FCF with both Java and ODP.NET Startup As soon as the DBA puts an additional instance into a RAC service the client receives a FAN / FCF event. Both Java and .NET use the additional instance immediatly (which is good). Java puts 2 connections...
    Erstellt in Urs Meier - Blog on IT (Weblog) von Anonymous am 05-15-2007

  • More on RAC and RLB

    My last RAC tests with runtime load balancing and .NET were not successful. ODP.NET always distributed the workload in a round robin manner. Now I know why: It is a AQ bug. I had more than one IP address defined (my real one and one for my vmWare). Since AQ send the RLB information back to client I had...
    Erstellt in Urs Meier - Blog on IT (Weblog) von Anonymous am 05-15-2007

  • CLB_GOAL LONG or SHORT?

    With Oracle 10g R2 FAN and FCF we can load balance connections and requests over a "service". The service is defined to be run on one or more instances on the RAC. Services take a CLB_GOAL LONG or SHORT and are created with DBMS_SERVICE.CREATE_SERVICE. LONG This is the normal setting, i.e....
    Erstellt in Urs Meier - Blog on IT (Weblog) von Anonymous am 10-04-2006

  • Oracle 10g RAC load balancing

    Lately we have done some tests with Oracle 10g R2 load balancing and connection failover for RAC. Both features are mainly useful for application servers. The bottom line: the JDBC driver from Oracle works, the ODP.NET provider not yet. Load balancing and connection failover are based on "services"...
    Erstellt in Urs Meier - Blog on IT (Weblog) von Anonymous am 10-03-2006
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