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This improves performance by eliminating the unnecessary disk I/O to persist the messages. In this case, the server does not needlessly save persistent messages. In the absence of a durable subscriber or subscriber with a fault-tolerant connection, there are no subscribers that need messages resent in the event of a server failure. Persistent messages published to a topic are written to disk only if that topic has at least one durable subscriber or one subscriber with a fault-tolerant connection to the EMS server. If A Persistent Message Is Published On To A Topic, Does These Messages Will Store On Disk If Topic Doesn’t Have Durable Subscriber Or Subscriber With A Fault-tolerant Connection? Reliable mode decreases the volume of message traffic, allowing higher message rates, which is useful for messages containing time-dependent data, such as stock price quotations.
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Where Does The Undelivered Messages Will Be Stored? These extensions allow EMS to exchange messages with TIBCO Rendezvous and Active Enterprise formats that have certain features not available within the JMS Map Message and Stream Message. EMS extends the Map Message and Stream Message body types.EMS also provides an EXPLICIT_CLIENT_ACKNOWLEDGE and EXPLICIT_CLIENT_DUPS_OK_ACKNOWLEDGE mode that restricts the acknowledgement to single messages. For consumer sessions, you can specify a NO_ACKNOWLEDGE mode so that consumers do not need to acknowledge receipt of messages, if desired.EMS also includes a RELIABLE_DELIVERY mode that eliminates some of the overhead associated with the other delivery modes. The JMS standard specifies two delivery modes for messages, PERSISTENT and NON_PERSISTENT.What Are The Extra Features Are Available In Ems Apart From Jms?
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As long as the durable subscriber exists.What Are The Limitations Of The Durable Subscriber? What Are The Messaging Models Does Ems Support?