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Subject: Re: [ws-rx] NEW ISSUE: semantics of "at most once" delivery assur ance


No. You can't make that assumption.

Cheers,

Christopher Ferris
STSM, Emerging e-business Industry Architecture
email: chrisfer@us.ibm.com
blog: http://webpages.charter.net/chrisfer/blog.html
phone: +1 508 377 9295

Dan Leshchiner <dleshc@tibco.com> wrote on 07/28/2005 02:55:47 PM:

> if AS makes RMS aware that AtMostOnce is used by AD/RMD, then RMS can 
assume that no 
> retransmissions will be necessary and, consequently, does not need to 
take up its resources to 
> make retransmissions available, right?
> 
> Christopher B Ferris wrote: 
> I think you meant AtMostOnce mode. I suppose you could do that, but from 

> the
> perspective of the RMS, it is still retransmitting until it receives an 
> ack.
> 
> Cheers,
> 
> Christopher Ferris
> STSM, Emerging e-business Industry Architecture
> email: chrisfer@us.ibm.com
> blog: http://webpages.charter.net/chrisfer/blog.html
> phone: +1 508 377 9295
> 
> Dan Leshchiner <dleshc@tibco.com> wrote on 07/27/2005 06:36:24 PM:
> 
> 
> Christopher B Ferris wrote:
> 
> 
> However, the protocol as specified would never be able to complete a 
> sequence
> if there are lost messages from the RMD perspective and the RMS is not
> retransmitting them.
> 
> 
> 
> why so? as RMD, if i see a gap or AckRequested for a sequence number i 
> have not received and i am operating in "at least once" mode with my AD, 

> 
> 
> 
> why cant i just send an Ack? if i did so, wouldn't that enable us to 
> complete the sequence?
> 
> thanks,
> dan
> 
> 
> 


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