Planning the Fabric

Hyper Messaging Protocol (HMP)

HyperFabric clusters running HMP applications are limited to supporting a maximum of 64 adapter cards. However, in local failover configurations, a maximum of only 52 adapters are supported.

In point-to-point configurations running HMP applications, the complexity and performance limitations of having a large number of nodes in a cluster make it necessary to include switches in the fabric. Typically, point-to-point configurations consist of only 2 or 3 nodes.

In switched configurations running HMP applications, HyperFabric supports a maximum of 64 interconnected adapter cards.

A maximum of 8 HyperFabric adapter cards are supported per instance of the HP-UX operating system. The actual number of adapter cards a particular node is able to accommodate also depends on slot availability and system resources. See node specific documentation for details.

A maximum of 8 configured IP addresses are supported by the

HyperFabric subsystem per instance of the HP-UX operating system.

Maximum Number of Switches

You can interconnect (mesh) up to 4 switches (16-port fiber or Mixed 8 fiber ports) in a single HyperFabric cluster.

Trunking Between Switches (multiple connections)

Trunking between switches can be used to increase bandwidth and cluster throughput. Trunking is also a way to eliminate a possible single point of failure. The number of trunked cables between nodes is only limited by port availability. To assess the effects of trunking on the performance of any particular HyperFabric configuration, contact your HP representative.

Maximum Cable Lengths

HF2 (fiber): The maximum distance is 200m (4 standard cable

lengths are sold and supported: 2m, 16m, 50m and 200m).

HMP supports up to 4 HF2 switches connected in series with a maximum cable length of 200m between the switches and 200m between switches and nodes.

HMP supports up to 4 hybrid HF2 switches connected in series with a maximum cable length of 200m between fiber ports.

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Chapter 2

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HP HyperFabric manual Hyper Messaging Protocol HMP