WebSphere Virtual Enterprise (formerly Operations Optimization), Version 6.1
             Operating Systems: AIX, HP-UX, Linux, Solaris, Windows, z/OS


Enabling cell affinity

The cell affinity function preserves sessions even in the event of an ODR outage when you configure unbridged, on demand router (ODR) topologies.

Before you begin

New feature: You can use this feature if you have installed Version 6.0.2.6, or Version 6.1.0.5 or later.newfeat

About this task

The cell affinity function prevents the loss of sessions when there are multiple ODRs within multiple, unbridged cells, and the IBM HTTP Server is configured to forward session traffic, either through load-balancing or failover, to more than one ODR.

Procedure

  1. In the administrative console, click System administration > Cell > Custom properties.
  2. Set the custom cell property odrSessionAffinityEnabled to true. See Configuring cell-wide custom properties for more information.
  3. Configure generic server clusters for other ODR cells. See Defining generic server clusters for remote ODR cells for more information.
  4. If you are configuring a multi-tiered configuration, the ODRs in one tier must be configured and operate independently from the ODRs in the other tiers. See Configuring cell affinity in a multi-tiered environment for more information. Note that you may also optionally perform this step in a single-tiered environment if you simply want to use a cookie name other than ODRSESSIONID.
  5. See [Version 6.1.0.3 and later] Generating the plug-in configuration in a high availability environment .
  6. Merge the plugin-cfg.xml files into one plugin-cfg.xml file. See pluginMergebat|.sh script for more information.
  7. Install the new plugin-cfg.xml on the IBM HTTP server. Refer to Configuring an on demand router to dynamically update the Web server plug-in configuration for more information on how to install a new plugin-cfg.xml.



Related information
Cell affinity function
Configuring cell affinity in a multi-tiered environment
Defining generic server clusters for remote ODR cells
pluginMergebat|.sh script
Creating and configuring ODRs
Configuring ODRs
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Last updated: Oct 30, 2009 6:17:06 PM EDT
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