Quality of Service

This drop-down list is displayed only when TIBCO Rendezvous is selected as the transport type in the Configuration tab. You can select the following types of services:

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Reliable (RV)

Ensures that each multicast or broadcast message is received as long as the physical network and packet recipients are working, and that the loss of a message is detected. This choice can compensate for brief network failures because it can retransmit a message on request if the first attempt failed. This choice is appropriate when message delivery is expected but some loss can be tolerated.

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Certified (RVCM)

Guarantees that every certified message reaches its intended recipient in the order sent. The message can be sent across network boundaries, and if a network fails, delivery attempts continue until delivery succeeds or until the message time limit expires. This is often called certified message delivery.

If certified message delivery is used, data is stored in a ledger file. The size of the ledger depends on several factors, the most important of which is the retention rate of stored data. That is, the ledger grows fastest in response to the cumulative length of undeliverable messages. You must ensure that sufficient disk space is available for the expected size of the ledger.

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Distributed Queue (RVCMQ)

This option is available for Subscription Service and Request-Response Service. An RVCMQ session allows applications to use distributed queues for certified delivery, to any number of listeners using queuing member sessions that act together to process inbound task messages.

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Transactional

This option is no longer supported. The option is only included for backward compatibility.

See TIBCO Rendezvous Concepts for details about quality of service.