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From Tim O'Neil <...@xythos.com>
Subject Re: [HA and failover - Re: saving session attributes across server machines]
Date Fri, 20 Apr 2001 16:36:26 GMT
This is a good link, for one thing it had a link to
another article that explains the stateless nature
of the http protocol as I understand it:

http://www.javaworld.com/javaworld/jw-12-2000/jw-1221-servlets.html

"What is a session?
The interaction between a Web browser and a Web server is stateless. The 
browser connects to the server, requests a single piece of information, 
then disconnects, at which point the server completely forgets about the 
transaction and awaits the next request. Sessions are traditionally used to 
create a state for Web-based communications. Essentially, they are 
dictionaries of name-value pairs that persist from one request to the next."

I thought we could all benefit from this after the discussion from
the other day on this topic.

At 09:42 AM 4/20/2001 -0600, you wrote:
>Hi and thanks for the response.
>I started to look more closely at this issue, and found an interesting article
>in JavaWorld April 01. This article explains how build a clustered Servlets
>Engines environement. It discusses 3 possibilities: (a) Centrelized Database,
>(b) JavaSpaces and (c) Replication between servlets.
>
>The article link is:
>
>http://www.javaworld.com/javaworld/jw-04-2001/jw-0413-servlets.html
>
>I would be happy to recieve any feedback from users who faced the same problem
>of building a truely robsut clustered environment for Web, Servlet-based
>applications.


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