ASYMMETRIC WEBLOGIC STANDBY DR SITE – ADDITIONAL STEPS REQUIRED FOR SWITCHOVER

Usually asymmetric DR topology is (in which PROD and standby sites’ configurations differ) used to save cost of standby site. If number of instances at both sites are same but number of cpus differ, there won’t be any additional steps required during switchover. But if number of instances differ, switchover will fail due to missing configuration like machines and managed server etc.

We got a 4 node weblogic cluster with restricted JRF (no daatbase) at production site and two 2 node cluster at standby site. We followed below additional steps to bring up weblogic domain at standby site. If you have SOA suite or webcenter etc the steps may differ.

  1. Removed MS3 and MS4 configuration from config.xml, entries between <server> tags.
  2. Removed node 3 and node 4 machine configuration from config.xml,
  3. Removed MS3 and MS4 from migratable targets section in config.xml
  4. Removed OHS3 and OHS4 configuration from system-components section in config.xml, entries between <system-component> tag.
  5. Removed MS3 and MS4 from coherence configuration in config.xml
  6. Removed OHS3 and OHS4 from WebLogicCluster tag in mod_wl_ohs.conf file.

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