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Subject: Messages spanning packets

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Kenny
Posts:2

08/01/2008 5:29 PM Quote Reply Alert 
The 1.4 spec mentions something about DeltaUpdates spanning packets and FullUpdates spanning messages and packets.

I'm not quite sure how that's supposed to work. i.e. The LinkFlag only applies to retransmitted messages, so how does one know if a DeltaUpdate spans packets or not?

Also, what is the meaning of a packet and a message, it appears there's one message per packet, or is there more? less?
William
Posts:15

08/25/2008 3:21 PM Quote Reply Alert 
For Open Book Ultra a packet may have one or more messages, up to 28. A delta update will not span a packet. Only a full update and a retransmission will.
joe
Posts:3

03/19/2009 2:56 PM Quote Reply Alert 
[quote]Posted By William on 08/25/2008 3:21 PM

For Open Book Ultra a packet may have one or more messages, up to 28. A delta update will not span a packet. Only a full update and a retransmission will.[/quote]


for a full update message then, how to tell if the message spans more than one packet and is william form the nyse dev/support group? thanks

joe
Posts:3

03/19/2009 5:27 PM Quote Reply Alert 
[quote]Posted By William on 08/25/2008 3:21 PM

For Open Book Ultra a packet may have one or more messages, up to 28. A delta update will not span a packet. Only a full update and a retransmission will.[/quote]

can a delta update span a message? if so how to tell
thanks
joe beattie (guest)

03/20/2009 12:38 PM Quote Reply Alert 
[quote]Posted By William on 08/25/2008 3:21 PM

For Open Book Ultra a packet may have one or more messages, up to 28. A delta update will not span a packet. Only a full update and a retransmission will.[/quote]

Since packets can come out of order - how do you tell the sequence of packets and the total number of packets for a full update and what is a reasonable amount of time to wait for missing packets? Also can a delta update span multiple messages?
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