Novell GROUPWISE 7 - INTEROPERABILITY GUIDE, Manual

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Place Constraint
The place constraint controls where nodes in a cluster resource group can fail over. A place
constraint includes a score. A score of 100 (the default) means that the resource group to which the
constraint is applied should run on the node assigned to the place constraint whenever possible. A
score of 50 means that the resource group to which the constraint is applied can fail over to the
assigned node when the initial node fails. A score of 0 means that the resource group never runs on
that node, perhaps because that node is used for some other program. A score of INFINITY means
that the resource group can only run on that node.
Order Constraint
The order constraint lets you place a cluster resource group either before or after another resource
group. For example, if you have the domain and post office in separate resource groups and you
want the domain to start before the post office, you would use an order constraint.
Colocation Constraint
The colocation constraint lets you designate resource groups that must run together on the same
node. For example, you might want the MTA and the Internet Agent for a domain to always run
together whenever the domain fails over. Or you might want the MTA and the WebAccess Agent to
always run together on the same node. To guarantee that two resource groups always run together,
give them a score of INFINITY in the colocation constraint.
HEARTBEAT CLUSTERING WORKSHEET
Under Item 9: Cluster Resource Group Constraints for Domain , list the nodes that might need to mount
the domain. The MTA might need to run on any node that the domain constraints allow. Therefore, you
will install the agent software on all of the nodes where the domain could possibly fail over. List the score
for each node.
If you are planning the post office in a different cluster resource group from where the domain is located,
under
Item 10: Cluster Resource Group Constraints for Post Office , list the nodes that might need to
mount the post office. The POA might need to run on any node that the post office constraints allow.
Therefore, you will install the agent software on all of the nodes where the post office could possibly fail
over. List the score for each node.
HEARTBEAT CLUSTERING WORKSHEET
Under Item 9: Cluster Resource Group Constraints for Domain , list any order constraints regarding the
domain.
If you are planning the post office in a different cluster resource group from where the domain is located,
under
Item 10: Cluster Resource Group Constraints for Post Office , list any order constraints regarding
the post office.
HEARTBEAT CLUSTERING WORKSHEET
Under Item 9: Cluster Resource Group Constraints for Domain , list any resource groups that you want to
run along with the domain.
If you are planning the post office in a different cluster resource group from where the domain is located,
under
Item 10: Cluster Resource Group Constraints for Post Office , list any resource groups that you
want to run along with the post office.