Reliable mutlicast or not
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Posted By:   Anonymous
Posted On:   Friday, December 12, 2003 04:20 AM

In the swiftmq home page Multicast Extension is described as a reliable multicast, but in detail page
(http://www.swiftmq.com/products/extension/multicast/index.html) the word 'reliable' is not used, here is wrote that is NOT guaranteed that messages are not lost. Someone know how is implemented this extension and when messages are lost ? Thanks

Re: Reliable mutlicast or not

Posted By:   Andreas_Mueller  
Posted On:   Friday, December 12, 2003 05:00 AM

SwiftMQ uses LRMP (Lightweight Reliable Multicast Protocol). The "Reliable" term means here it uses an ACK/NAK protocol to avoid packet loss. However, multicast is n:m and it depends on the speed of the consumers, the number of multicast clients and the resp. window sizes whether a packet could be resent and thus is not lost. LRMP has many options to configure flow control etc.

Read this whitepaper for a better understanding.
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