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Another option is to use a hardware (or third-party software-based) load
balancer. Many of these include session-based load balancing, which directs
an initial request to one server and then examines cookies (or IP
addresses) to direct future requests to that same server.
Alteon, Cisco Load Director, and F5's BIG/IP are several such load
balancers. (There are software ones, too, but it's been a while since I
looked at them, and I've only used the hardware ones.)
Regards,
Ben Flaumenhaft
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>BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
>WHEN YOU POST, include all relevant version numbers, log files,
>and configuration files. Don't make us guess your problem!!!
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>
>We are utilizing Jserv with one server which runs both Apache, Jserv,
>and the JVM. In time, we want to make this whole setup scalable using
>load balancing through a router. However, we are worried that session
>information would be lost. Say we have machines A, B, and C. User Fred
>makes a request for a servlet and the router finds that A is open so A
>get the business. Fred then hits a link on the returned HTML page and
>the router send this to machine B, not A. Will the session information
>be available? My first inclination is that it will not. Does Jserv have
>a way to utilize load balancing while keeping the session information?
>Should we let Jserv do the balancing? or should we load balance by IP,
>that is, IP 12.1 through 12.254 load balance on A, 13.1 through 13.254
>on B, etc.?
>
>Or does this make no sense whatsoever?
>
>Ben Ricker
>Web Administrator
>US-Rx, Inc.
>
>
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