I'd echo Geert's question as to whether you "really need this". If so,
you might look at IBM's WebSphere v3.02. Part of it's infrastructure is a
UDB relational DBMS. Serializable session content can be stored here by the
engine for fail over or load balancing. Their routing algorithm will
attempt to route the request to the same engine instance, but in the event
that it can't the serialized session data is accessible by the new JVM. As
you can imagine, there are design and performance considerations.
We've looked at it, but have not actually implemented it. Current loads
don't require it.
Bill McGovern
> -----Original Message-----
> From: Geert Van Damme [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, March 02, 2000 2:49 AM
> To: [EMAIL PROTECTED]
> Subject: Re: JServ (or any other servlet engine) and load balancer
>
> well,
>
> my first question is: do you really need the load balancing?
> I know it's a great thing and it's very impressive to say that you need
> load
> balancing (since that would mean you have several million hits per day).
> Maybe your servlets do a lot of processing, but in that case I would load
> balance the processing (multiple JServ machines, RMI ,....)
> It seems you do load balancing on the web server, and it's my idea that
> this
> is only needed for VERY high traffic.
>
> Ok, so you want to keep your load balancing setup (maybe it wasn't your
> decision;-)
> Take a look at
> http://java.apache.org/jserv/howto.load-balancing.html#Session
>
> about sessions and load balancing.
>
> Geert 'Darling' Van Damme
>
> > -----Original Message-----
> > From: A mailing list about Java Server Pages specification and reference
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Richard Yee
> > Sent: dinsdag 29 februari 2000 0:14
> > To: [EMAIL PROTECTED]
> > Subject: JServ (or any other servlet engine) and load balancer
> >
> >
> > Hi,
> > Has anyone here used JServ or any other servlet engine on a machine
> > running behind a load balancer? Our configuration is that we
> > have multiple
> > machines running Apache and JServ w/ GnuJSP running behind a load
> > balancer.
> > We have a problem with HttpSessions b/c the sessions are not shared
> across
> > the JServ installations. If a session is created for a user on server
> 'A'
> > for example, and later, the user's request is directed to server 'B',
> then
> > the user's session is not present and a new session is started. What we
> > would like is that the session remain intact regardless of which server
> a
> > request is directed to. Is there a configuration of the servlet
> > runner that
> > will allow this? Does anyone have any suggestions about this
> > configuration?
> >
> > Thanks,
> >
> > Richard
> >
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> > FAQs on JSP can be found at:
> > http://java.sun.com/products/jsp/faq.html
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> >
> >
>
> ==========================================================================
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> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
