>>> Shashank Phadke <[EMAIL PROTECTED]> 10/26/99 1:59:07 AM >>>
>Are there any servlet engines which can have
>multiple JVMs talking to the same webserver(Any
>experiences with JRun, in particular)?
You don't need to have a 1-1 mapping by virtue of the fact that you
can have many JVMs on different machines from the web server and use a
round robin DNS server to ensure that URLs served from webpages on the
webserver get to all the VMs.
>servlet engines for load balancing and then these
>servlet engines (diff JVMs) share a common session data.
load balancing session data is quite hard.
Personally I recommend having many servlet engines but using them as
the front piece of the app (ie: first thing you come to off a round
robin) and only serving things like GIFs and JPEGs from a webserver.
Servlet engines can shift plain old HTML pretty quick, certainly
quick enough that it makes it more convienant to do it that way.
Whilst a user has a session the user sticks with the same servlet
engine... this negates the need to do any kind of load balancing.
I work on BTs Talk21 project where we have something like 450,000
users with this system (and it works v.well).
Nic Ferrier
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