Hi Sam --
> > Hello All --
> >
> > I am trying to use JSPs & servlets in a clustered environment as
> > the middle
> > tier of
> > a three-tier application; the backend is an EJB server running
> against an
> > Oracle database. The current idea (but this is flexible) is to put a
> > separate instance of JRun on each web server. So far, so good.
>
> Which EJB server? Just wondering... :)
Persistence PowerTier.
> > The problem is that I want use the servlet session tracking API; to my
> > dismay, I just found out that our load balancing hardware
> cannot guarantee
> > that successive calls from the same client will go to the same
> web server.
> > So an HttpSession object in any particular instance of JRun is
> > useless if it
> > is unknown whether that client has already established a session with
> > another instance. AFAIK, JRun cannot be set up to automatically manage
> > sessions in a cluster. If this is incorrect, I would appreciate a quick
> > slap in the face and a pointer to the appropriate documentation.
> > Also, any
> > pointers to servlet/JSP engines that do support this behavior would be
> > helpful.
>
> BEA WebLogic supports an environment where you can do this,
> except you don't
> need the load balancing hardware.
>
> WebLogic Routing Servers --> WebLogic Servlet Engines --> EJB Servers
>
> or even the more abbreviated set up:
>
> Routing Server --> WebLogic Servlet/EJB Server
>
> Additionally your sessions can be fault-tolerant with either in-memory
> replication or persistent replication.
These are all very cool features; I just wish they were available in a
standalone servlet engine (or at least the clustered session tracking).
We'll see...for now we're planning on rolling our own.
Michael A. Grafton
http://www.live365.com/
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