[This message was posted by Dale Wilson of Object Computing, Inc 
<[email protected]> to the "FAST Protocol" discussion forum at 
http://fixprotocol.org/discuss/46. You can reply to it on-line at 
http://fixprotocol.org/discuss/read/317b59e1 - PLEASE DO NOT REPLY BY MAIL.]

Hanno said:
> UDP by nature is an unreliable protocol. Hence, the first message in a
> datagram always has to be complete and FAST can only work its magic as
> of the second message. Your assumption of one message per UDP datagram
> defeats the very purpose of FAST.

Basically true, but the FAST magic is useful even in a single message if the 
messages contains Sequences (FIX repeated groups)  CME takes advantage of this 
in their one message/packet UDP feeds.

It is important to note that you have to reset the decoder (clear the 
dictionaries) between each packet due to the possibility of packet loss.

Dale



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