[JDEV] phew

[Thomas Charron]

From: "Rodolphe Duge de Bernonville" <rod at idealx.com>
Subject: Re: [JDEV] phew
> As I told you in my mail, I dont think it is very scalable ...
> With 3 servers, in this configuration :
> 1 <--> 2 <--> 3
> You will have a problem when you want to route message from server 2 ...
> Where must go your packet ?  server 1 or server 3 ?
> You need to know where must go the packet, and so where is the session
> (which server ...).
> Therefore, you have 2 approaches :
> - centralize information : sql database (with xdb_sql ...), or files,
> (xdb_file, with nfs server) and use mod_route and the patch to
> dialback.c.
> - dont centralize information : mod_farm, but it becomes difficult
> to do things like load balancing ...

    There is a third option that one could use to solve this situation that
could work.  You could setup a backend network, and basically setup a
broadcast to all hosts for packets you do not know what to do with.  Again,
there are issues with this approach, but it is a third option.

    There is also several other approaches one could use, including
something simular to a farm, but implemented as a domain tree, with users
residing in a given domain (NOT necceserily having the same DNS domain, but
a 'logical' domain).  In this method, you could have 10 logical domains,
with users being assigned to a given domain.  You then assign a machine per
domain, and that domain 'controller' handles ALL interactions for a given
user.