IBM MQ Multicast

IBM MQ Multicast offers low latency, high fan out, reliable multicast messaging.

Multicast is an efficient form of publish/subscribe messaging as it can be scaled to a high number of subscribers without detrimental effects in performance. IBM MQ enables reliable Multicast messaging by using acknowledgments, negative acknowledgments, and sequence numbers to achieve low latency messaging with high fan out.

IBM MQ Multicast's fair delivery enables near simultaneous delivery, ensuring that no recipient gains an advantage. As IBM MQ Multicast uses the network to deliver messages, a publish/subscribe engine is not needed to fan-out data. After a topic is mapped to a group address, there is no need for a queue manager because publishers and subscribers can operate in a peer-to-peer mode. This allows the load to be reduced on queue manager servers, and the queue manager server is no longer a potential point of failure.

• Initial multicast concepts
  IBM MQ Multicast can be easily integrated into existing systems and applications by using the Communication Information (COMMINFO) object. Two TOPIC object fields enable the quick configuration of existing TOPIC objects to support or ignore multicast traffic.

Parent topic: IBM MQ Technical overview