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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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+ <H1>[Nel] Suggestion for the NeL network library / architecture</H1>
+ <B>MIGUEL ANGEL BLANCH LARDIN</B>
+ <A HREF="mailto:x5101920%40fedro.ugr.es"
+ TITLE="[Nel] Suggestion for the NeL network library / architecture">x5101920@fedro.ugr.es</A><BR>
+ <I>Tue, 12 Dec 2000 12:20:32 +0100 (MET)</I>
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+<PRE>&gt;<i> Ahem, no. I might have used object and agent in various contexts,
+</I>but
+&gt;<i> an agent is the only one which is authorised to change its state.
+</I>The
+&gt;<i> other objects are &quot;replica&quot;, or passive objects. Each agent may
+</I>exist
+&gt;<i> only as a single copy over the set of processes, and he is the
+</I>entity
+&gt;<i> responsible for updating the local states of the replica objects in
+</I>&gt;<i> the other processes.
+</I>&gt;<i>
+</I>&gt;<i> If you want &quot;what is your XYZ&quot;, the local replica answers. However,
+</I>if
+&gt;<i> you want &quot;teleport to XYZ&quot;, the message is transmitted across the
+</I>network
+&gt;<i> to the unique agent, which updates its internal state, and then
+</I>retransmits
+&gt;<i> to all replicas &quot;set internal state XYZ&quot;. And the latter is when
+</I>multicast
+&gt;<i> helps when there are many replicas to update.
+</I>
+Ok, as far as I am thinking about agents, a replica only show info but
+can't process code. So all the modificators should be send to the
+main agent, that then update.
+
+There is still the possibility of an object to get two contradictory
+updates at the same time. To avoid this you should order the messages,
+something that I feel is unefficient and ugly.
+
+Just image agent is a ball, and then two user decide to kick the two
+replica of the agent, so the replicas get the kick commnand and send
+it to the agent.
+
+&gt;<i> &gt; Replycating work can be a real pain.
+</I>&gt;<i>
+</I>&gt;<i> Hey, if I could buy a terahertz processor and have everything run on
+</I>a
+&gt;<i> single process, I'd be happy too :)
+</I>
+If you need a terahertz processor to run the server, you better start
+again the design stage.
+
+Just I want to note that replycanting the work can lead to ugly
+things and race conditions.
+
+</pre>
+
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