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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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+ <H1>[Nel] Re:More news from the nevrax teams...</H1>
+ <B>Daniel Miller</B>
+ <A HREF="mailto:miller%40nevrax.com"
+ TITLE="[Nel] Re:More news from the nevrax teams...">miller@nevrax.com</A><BR>
+ <I>Thu, 21 Jun 2001 18:47:37 +0200</I>
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+<PRE>To extend the explanation a little - the way we see things is this:
+
+- The server sets for MMORPGs and the like have to be secure - that means
+that any old Tom, Dick or Harry can't send a message directly to the economy
+service to tell it that they've just won the lottery :)
+
+- This means that the clients only have access to the front end services on
+the front end servers and that they don't have access to the naming service.
+(in order to connect to the front end services clients have to use the login
+service as a go-between... there are examples in our samples directory
+showing how this works)
+
+- So - the naming service runs on a smallish LAN that connects the game
+servers. It broadcasts messages like 'the xxx service has just arrived at
+address yyy' or 'the www service at address zzz has gone down/ disappeared'.
+These are cached by each service to keep an up to date address book of the
+other services that they can talk to.
+
+- In the normal way we don't see services being started or stopped as a very
+high frequency event.
+
+I hope this helps.
+
+Daniel.
+
+
+--------------------------------------------------------------------
+Hello,
+
+
+&gt;<i> I have a question about the caching for the naming service. You say it
+</I>&gt;<i> automatically corrects caches when services move or are deleted. This
+</I>&gt;<i> doesn't sound very scalable, it every client querying the name server
+</I>&gt;<i> has to be contacted when something they asked about changed (especially
+</I>&gt;<i> over high latency links).
+</I>
+
+Right, but in fact, we developed the system to fit our requirement for our
+game and in our system (in the shard), the naming service and all ther
+services are on a LAN, so we don't have high latency links.
+
+regards,
+
+Vianney Lecroart
+
+
+</pre>
+
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