HP HyperFabric manual Configuring HMP for Transparent Local, Failover Support

Configuring HyperFabric

Configuring HMP for Transparent Local Failover Support

	Configuring HMP for Transparent Local
	Failover Support
	HMP supports Local Failover in the HyperFabric version B.11.23.01.
	If a HyperFabric resource (adapter, cable, switch or switch port) fails in a
	cluster, HMP transparently fails over traffic (Local Failover) using
	another available resource from the card pair. A card pair can be defined
	as a logical entity comprising of a pair of HF2 adapters on a HP 9000
	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 in HyperFabric
	version 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. 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.

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