HyperFabric Configuration Guidelines

Hyper Messaging Protocol (HMP)

HyperMessaging protocol (HMP) is an HP patented, high performance

cluster interconnect protocol. HMP provides reliable, high speed, low

latency, low CPU overhead, datagram service to applications running on

HP-UX operating systems.

HMP was jointly developed with Oracle Corp. The resulting feature set

was tuned to enhance the scalability of the Oracle Cache Fusion

clustering technology. It is implemented using Remote DMA (RDMA)

paradigms.

HMP is integral to the HP-UX HyperFabric driver. It can be enabled or

disabled at HyperFabric initialization using the clic_init command or

SAM.

HMP significantly enhances the performance of parallel and technical

computing applications.

HMP firmware on HyperFabric adapter cards provides a “shortcut” that

bypasses several layers in the protocol stack, boosting link performance

and lowering latency. By avoiding interruptions and buffer copying in

the protocol stack, communication task processing is optimized.

Although HMP is supported on some HF1 hardware (see Table 7 on

page 29), it is optimized to run on HF2 hardware.

Application Availability

The following are the two families of applications that can use HMP over

the HyperFabric interface:

• Oracle 9i Database, Release 1 (9.0.1) and Release 2 (9.2.0.1.0).

HMP has been certified on Oracle 9i Database Release 1 with HP-UX

11.0 11i

v1, and 11i v2.

HMP has been certified on Oracle 9i Database Release 2 with HP-UX

11.0, 11i v1 and 11i v2.

• Technical Computing Applications that use the HP Message Passing

Interface (HP-MPI).