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MRG 3 Overview
1. The Top Six Differences between MRG Messaging 2 and 3
These are the most significant differences between MRG 2 and MRG 3:
- The broker and the C++ messaging library (
qpid::messaging) now offer amqp1.0 support via the Apache Proton library (note that transactions are not yet available over amqp1.0). - Clustering has been replaced with a new High Availability implementation.
- Queue Threshold alerts are now edge-triggered, rather than level-triggered. This improves alert rate limiting.
- The flow-to-disk implementation has been changed to disk-paged queues to more efficiently use memory.
- The
ring-strictlimit policy has been dropped. - The messaging journal has been replaced with a new implementation - the dynamically-expanding Linear Store.
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