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Re: multicasting and distributed objects

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Re: multicasting and distributed objects

Subject: Re: multicasting and distributed objects
From: "A.M." <email@hidden>
Date: Tue, 9 Oct 2007 14:01:27 -0400


On Oct 9, 2007, at 11:43 , David Spooner wrote:

Has anyone attempted to do multicasted distributed objects using NSSocketPort/NSPortCoder? I realize that is doesn't make sense generally, but it does make sense for sending oneway messages to a singleton in a large number of clients. I also realize that multicasting requires explicit treatment of dropped and mis-ordered messages...

I have coded a prototype which uses NSArchiver, but this technique does not support NSInvocation or byref objects.

Any insights will be greatly appreciated.


Take a look at Avis:
http://avis.sourceforge.net/

Reliable multicasting is a notoriously expensive problem. Even if you send a one-way message, how do you know it was received and being processed over UDP multicast?

What limitation does your prototype impose so that it can't handle NSInvocations?

Cheers,
M
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  >multicasting and distributed objects (From: David Spooner <email@hidden>)




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