This section describes the Lotus Sametime Unified Telephony software components and how they contribute to cluster redundancy functionality. Two software components are relevant: the PRIMECLUSTER and the RTP software.
System Specific Information
PRIMECLUSTER supports the cluster interconnect and offer applications well-defined interfaces which are required for cluster operation. These interfaces include internode communication which is used by processes on different nodes to communicate with each other. Unlike other external communication interfaces that are available in every operating system, the internode communication supports redundant connections for availability reasons and a low latency protocol. A short latency period (the time required to send a message to another system and receive an acknowledgment) is just as important to the scalability of a cluster as the line throughput rate, though both are closely linked.Parent topic: Cluster Redundancy
Lotus Sametime Unified Telephony uses the RTP to run and manage the processes necessary for configuration, call processing, performance monitoring, and system maintenance. RTP provides redundancy and load sharing capabilities by enabling multiple computing elements, or logical nodes, within the system. While one process may be running on one CE, another process may be running on another CE within the system. Because the RTP can initiate multiple instances of the same process, different instances of the same process may run on different CEs within the system.