HyperFabric Configuration Guidelines

Hyper Messaging Protocol (HMP)

Card-Pair is a logical entity comprising a pair of HF2 adapters on an

HP9000 node. For example, if there are four HF2 adapters installed and

configured in a node, then there would be two card pairs.

IMPORTANT Remember the following points while configuring HMP for Local

Failover support:

• Only Oracle applications can make use of the local failover feature.

Other middleware like MPI can continue using HMP without local

failover support.

• HMP supports the local failover configuration only in HyperFabric

version B.11.11.03 and B.11.23.01.

• All nodes in the cluster need to be configured either in the local

failover mode or the non-local failover mode. Do not mix these two

modes. While using clic_init, if you answer ‘y’ to the question, “Do

you want to configure Local Failover on this node?”, then you have

configured HMP for the local failover mode. Otherwise, your HMP

configuration is for the non-local failover mode. Do not mix these two

modes. For any incorrect configurations, HP recommends that you

clic_shutdown and clic_start the cluster.

• The Transparent Local Failover feature over HMP is supported only

in a switch-based environment. If two nodes are connected through

multiple point-to-point links, local failover cannot be achieved.

• There must be even number of HF2 adapters on any given node, and

all adapters installed must be configured. In addition, all the

adapters must belong to a Card-Pair.

• HMP can fail over traffic only between adapters that belong to the

same card pair.

• Backward compatibility with earlier versions of HyperFabric is not

supported in the local failover mode. However, backward

compatibility and interoperability are supported without local

failover support.

• When HMP is configured in the local failover mode, all the resources

in the cluster are utilized. If a resource fails in the cluster and is

restored, HMP does not utilize that resource until another resource

fails.