WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

Member notification
To notify the other core group members of a status change, an XCF group user
routine is executed.
The group user routine enables XCF to notify active members of a group when
there is a change in the operational state of any other member in the group, or a
change to the status of any system in the sysplex.
This triggers the HA coordinator inside WebSphere Application Server for z/OS
to perform neccessary actions.
14.5.5 Activating XCF support for HA manager
To take advantage of the enhanced HA manager discovery and failure
mechanism, the following requirements must be satisfied: (Otherwise you have to
use the default policy.)
► The z/OS VTAM® component must be configured to start XCFINIT = YES, to
enable TCP/IP to use the XCF service.
► All core group members must be on Version 7 of WebSphere Application
Server
► All core group members must be running on z/OS
► Should the core group be bridged to another core group, then all bridged
groups must be reside on z/OS in the same sysplex
When these prerequisites are met, perform the following steps to activate the
XCF support in the Integration Solutions Console:
1. Select Servers → Core Groups → Core Group settings.
2. Select the core group you want to modify.
3. In the selected core group, select Discovery and failure detection.
4. Check the Use alternative protocol providers radio box and enter the fully
qualified class name for the z/OS factory that is used to create the alternate
protocol provider, com.ibm.ws.xcf.groupservices.LivenessPluginZoSFactory,
as seen in Figure 14-9 on page 445.
444 WebSphere Application Server V7.0: Concepts, Planning, and Design