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IBM WebSphere MQ V7.1 and V7.5 Features and Enhancements by Carolyn Elkins, Mark Taylor, Jamie Squibb, Alexander Ross, Barry Dearfield, Craig Both, Cezar Aranha

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Shared message data set and message offloading (z/OS)
WebSphere MQ V6 introduced support for messages on shared queues that were longer than the 63 K maximum that can be stored in a coupling facility. Before version 7.1, messages larger than 63 K were stored in a shared DB2 table and the message body size was fixed at 63 K.
WebSphere MQ version 7.1 introduces two new concepts that are covered in this chapter: shared message data sets (SMDS) and message body offloading rules.
The chapter contains the following sections:

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