Managing HP Serviceguard A.12.00.00 for Linux, June 2014

4.9.10.8.1 Load Balancing
When capacity and weights are configured in a cluster, the packages can either start or failover
in one of the following ways:
To the node that has the least used capacity, if the node capacity is INFINITE.
To the node that has the highest capacity remaining, if the node capacity is finite.
4.9.10.8.2 Parameters
LOAD_BALANCING
You can set the LOAD_BALANCING parameter ON or OFF in the cluster configuration file. If you
enable LOAD_BALANCING parameter, load sensitive fail over takes place. By default, the
LOAD_BALANCING parameter is set to OFF.
4.9.10.8.3 Keyword
You can specify the following keyword for CAPACITY_VALUE in the cluster configuration file:
INFINITE
Sets the CAPACITY_VALUE to INFINITE for a node. This means that the node is eligible to run a
package with respect to weight constrains.
NOTE: This value helps you ensure a configuration, that is, when some nodes fail, all the
workloads are balanced and placed on the remaining nodes without bringing any of the nodes
down.
4.9.10.8.4 Limitations
Capacity must be set to either INFINTE or a finite value for all the nodes in the cluster.
NOTE: When the LOAD_BALANCING parameter is set to ON in the cluster:
You can define only ONE capacity per node.
You cannot have a combination of finite and INFINITE values.
All nodes in the cluster must be configured with only one capacity, and packages can be
configured with the corresponding weight when the LOAD_BALANCING parameter is set to
ON.
The failover policy for a package must always be CONFIGURED_NODE. Other failover policies
are not allowed when the LOAD_BALANCING parameter is set to ON.
This feature is enabled only when all the nodes in the cluster have the same patch installed
or higher versions. The patch id is PHSS_43620.
When the LOAD_BALANCING parameter is set to ON, it does not support the reserved
CAPACITY_NAME package_limit.
4.9.10.8.5 Recommendation
If the LOAD_BALANCING parameter is ON, HP recommends that packages must set their
weight_value other than the default value of zero.
4.9.10.8.6 Using Load Sensitive Package Placement
Cluster configuration file
In the cluster configuration file:
126 Planning and Documenting an HA Cluster