Management of Process-to-Process Inter-Cluster Communication Requests

An apparatus, comprising:

• a processor;
• and
• a memory coupled to the processor, wherein the memory comprises instructions which, when executed by the processor, cause the processor to:
• receive, from a first application, a call in a first operating system in a first data processing system of a plurality of data processing systems;
• pass, by the first operating system, the call from the first operating system to a first host fabric interface controller in the first data processing system without processing the call;
• process, by the first host fabric interface, the call to determine a second data processing system in the plurality of data processing systems with which the call is associated, wherein the call is processed by the first host fabric interface without intervention by the first operating system;
• initiate, by the first host fabric interface, an inter-cluster connection to a second host fabric interface in the second data processing via a set of integrated switch/routers, a set of network interface controllers, and a network;
• and
• transfer the call to the second host fabric interface in the second data processing system via the inter-cluster connection.

A computer program product comprising a computer recordable medium having a computer readable program recorded thereon, wherein the computer readable program, when executed on a computing device, causes the computing device to:

• receive, from a first application, a call in a first operating system in a first data processing system of a plurality of data processing systems;
• pass, by the first operating system, the call from the first operating system to a first host fabric interface controller in the first data processing system without processing the call;
• process, by the first host fabric interface, the call to determine a second data processing system in the plurality of data processing systems with which the call is associated, wherein the call is processed by the first host fabric interface without intervention by the first operating system;
• initiate, by the first host fabric interface, an inter-cluster connection to a second host fabric interface in the second data processing via a set of integrated switch/routers, a set of network interface controllers, and a network;
• and
• transfer the call to the second host fabric interface in the second data processing system via the inter-cluster connection.