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Configuring HyperFabric
Configuring HMP for Transparent Local Failover Support
| Configuring HMP for Transparent Local Failover |
| Support |
| HMP supports Local Failover on |
| 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. |
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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 can continue using HMP without local failover support. |
| • HMP supports the local failover configuration from HyperFabric version B.11.11.03. |
| • All nodes in the cluster need to be configured either in the local failover mode or the |
| |
| 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 |
| 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 |
| |
| |
| • 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. |
| • HMP does not support backward compatibility in the local failover and |
| failover mode. However, TCP/UDP/IP supports backward compatibility and |
| interoperability. |
| • 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. |
| • Before running clic_start on all the nodes in the cluster, ensure that all the configured |
| cards are connected in the cluster. In other words, before running the clic_start |
| command, verify that all the cables are connected to the adapters and switches. |
| • If a resource in the cluster fails and is restored, perform the following steps to ensure |
| full utilization of that resource: |
| — Shutdown Oracle RAC |
| — Execute the clic_shutdown command |
| — Execute the clic_start command |
| — Restart Oracle RAC |
82 | Chapter 4 |