Suppose we have a load balancer doing sticky sessions, and have JRun persisting servlet
sessions to the database. When a machine becomes unavailable and the load balancer is
forced to send requests to another machine, will the new machine be able to retrieve
the
user's session from the database, and continue without the user being affected?
Scott Stirling wrote:
> The corporate answer is to buy JRun 3.0 Enterprise and use ClusterCats
> (which is included in the Enterprise license) to do your load balancing and
> fail over. ClusterCats also works nicely with Cisco LocalDirector if you
> have that. As someone else said, no matter what, you'll need to turn on
> sticky sessions to lock sessions to servers. Another alternative is to
> maintain all session data on the server in a database, but I think this
> would be much slower.
>
> There are other folks here who know a lot more about ClusterCats and load
> balancing issues than I do, so if you have any questions about it, fire
> away.
>
> Scott Stirling
> Allaire Corporation
> http://www.allaire.com/developer/jrunreferencedesk/
>
> > -----Original Message-----
> > From: Earle Flynn [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 09, 2000 8:49 AM
> > To: [EMAIL PROTECTED]
> > Subject: Load Balancing and Session Var's
> >
> >
> > All our java applications (servlets, JSP based) are run by
> > JRUN and we
> > use the JRUN session to save session data. But since our website is
> > supported by two webservers with round-robin DNS load balancing, the
> > user can get switched to the other webserver in the middle of
> > a session
> > and lose all the session data. Is there a solution for this.
> > Is there a
> > way to make the web-browser to the same physical webserver
> > for the life-
> > time of the web-browser session?
> >
> > Any pointers or help would be greatly appreciated.
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