Network Deployment (Distributed operating systems), v8.0 > Establishing high availability > Establishing high availability for Service integration > High availability and workload sharing > Configure high availability and workload sharing of service integration > Configure a core group policy for messaging engines

Use match criteria to associate a policy with a messaging engine

Use this task to configure match criteria to associate a core group policy with a messaging engine. To complete this task, have created a policy to associate with the messaging engine. Each messaging engine is managed by an HAGroup to which a policy is assigned at run time. The policy assigned to an HAGroup is chosen by comparing the match criteria of the set of configured policies with the properties of the HAGroup. The policy with the strongest match is assigned to the HAGroup. The following table lists the names and values of the HAGroup properties for a messaging engine, and the set of matching messaging engines if a property is used in the policy match criteria:

Name	Value	The messaging engine or engines that the policy matches
type	WSAF_SIB	Any messaging engine
WSAF_SIB_MESSAGING_ENGINE	The name of the messaging engine. This is in the form node.server-bus for a messaging engine in a server, or cluster.number-bus for a messaging engine in a cluster, where number relates to the order that messaging engines were added to the bus (the first messaging engine that is created when you add the cluster to a bus has the number 000).	A particular messaging engine
WSAF_SIB_BUS	The name of the bus	All messaging engines in a particular bus
IBM_hc	The name of the cluster	All messaging engines in a particular cluster

For more information about match criteria for messaging engines, see Match criteria for service integration.

If you use messaging engine policy assistance to configure the messaging engine behavior for messaging engines in a cluster, suitable match criteria are created automatically and you do not have to specify any.

Procedure

1. Open the match criteria page for your policy by clicking Servers -> Core groups -> Core group settings -> core_group_name -> [Additional Properties] Policies -> policy_name -> [Additional Properties] Match criteria .

2. Click New to create a new match criterion.
3. Enter a suitable Name and Value to specify a messaging engine, or group of messaging engines, that will match this policy. Use the information in the previous table to find the required name and value for the selection you want.

   For more description of the fields on this page, see Match criteria settings. For more information about finding the correct names for match criteria, see Core group settings.

4. Click OK.
5. Repeat the previous three steps for each match criteria to add to the policy. You add match criteria to make the match stronger, and to progressively restrict the set of HAGroups that the policy can match. We must specify at least two match criteria to ensure that the policy creates a stronger match than the match that the "Default SIBus Policy" creates. For example, to associate a policy with all the messaging engines in a cluster, you might specify the following match criteria:

   Name	Value
   type	WSAF_SIB
   WSAF_SIB_BUS	bus_name
   IBM_hc	cluster_name

6. Save your changes to the master configuration.

Match criteria for service integration
Delete a redundant core group policy
Add a cluster to a bus without using messaging engine policy assistance

Related

Match criteria settings
Core group settings

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