COMPUTER PROGRAM PRODUCT USING TWO DIFFERENT PROGRAMS TO DETERMINE STATE OF A NETWORK NODE TO ELIMINATE MESSAGE RESPONSE DELAYS IN SYSTEM PROCESSING

摘要

The determination of node and/or adapter liveness in a distributed network data processing system is carried out via one messaging protocol that can be assisted by a second messaging protocol which is significantly less susceptible to delay, especially memory blocking delays encountered by daemons running on other nodes. The switching of protocols is accompanied by controlled grace periods for needed responses. This messaging protocol flexibility is also adapted for use as a mechanism for controlling the deliberate activities of node addition (birth) and node deletion (death).