Points to consider when planning for multiple realms in WebSphere Portal

  •  A realm is a defined subset of number of repositories defined in the federated repository configuration of the Virtual Member Manager (VMM).
  • Multiple realms are NOT supported when WebSphere Portal user registry is configured as stand-alone repository.
  • A group in one of the repositories cannot encompass members from another repository.
  • Names  must be unique across the entire federated repositories.
  • VMM users a database to federate and track its child repositories. The database does not contains the individual user membership but it contains the necessary information required to access the child repository.
  • A single realm can be applied to multiple virtual portals but you can’t assign multiple realms to a single virtual portal.
  • VMM stores it’s configuration settings in wimconfig.xml file which can be located at /wp_profile/conf/cell/<cellname>/wim/config directory.
  • The wimconfig.xml file defines: The participating repositories for databases and LDAPs, The full repository’s base distinguished names (DN) and search bases for user and groups, The realms configuration for all defined realms.



About Ishtiaque

I am IBM Certified Infrastructure Systems Architect, Linux Foundation Certified System Administrator, Oracle Certified Programmer in Java and Web Component Developer, and TOGAF 9 certified with over 10 years of support and development experience in IBM middleware software and Java. Additionally, have a sound grip in databases and OpenStack administration. I hold the following certifications: IBM Certified Infrastructure Systems Architect Linux Foundation Certified System Administrator (LFCS) TOGAF 9 Certified Oracle Certified Expert, Java EE6 Web Component Developer Oracle Certified Professional – Java 6 Programmer ITIL v3 Foundation Certified IBM Certified Solution Architect – Cloud Computing Infrastructure V1 IBM Certified System Administrator – WebSphere Portal V8, V7, V6.1, V6 IBM Certified System Administrator – WebSphere Application Server V7, V6.1 IBM Certified System Administrator – AIX V7 IBM Certified System Administrator – WebSphere MQ V7 IBM Certified Deployment Professional – Business Process Manager Advanced V7.5 IBM Certified Solution Advisor – Cloud Computing Architecture V3 IBM Certified Solution Developer – WebSphere Portal V5.1
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