1. TIBCO RV is based on TRDP/PGM Protocol while TIBCO EMS is based on JMS protocol Or you can say RV is like a radio broadcaster and EMS is like a telephone.
2. TIBCO RV is based on dynamic subject based messaging while TIBCO EMS is based on static queues and topic based messaging.
3. In TIBCO RV, RVD Runs on every machine and hence it doesn’t have single point of failure. In case of EMS, EMS server is single point of failure.
4. TIBCO RV works on Bus model while TIBCO EMS works on Hub and Spoke model
5. RV uses a reliable multicast protocol so it supports fast high fan-out messaging capabilities like sending stock ticks to a large number of trading desks (what it was originally designed for). But the tradeoff is poor security and some limits on administration. There are also special considerations for communication across multiple LAN segments or WANs.
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