February 2004
Intermediate to advanced
848 pages
27h 25m
English
Content preview from WebLogic: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Configuring a Simple Web Cluster
Whenever you deploy a web application to a WebLogic cluster, you need something sitting before the cluster (i.e., between the client and the cluster) that can direct incoming requests to the appropriate server that hosts the primary session state. There are many ways in which you can accomplish this:
- Hardware load balancer
A hardware load balancer can be placed in front of the cluster. In this case, all client requests to the cluster must pass through the load balancer. The load balancer can distribute requests across the available members of the cluster, and direct requests involved in a session to the appropriate server holding the primary state.
- Web server with proxy plug-in
A web server can be augmented with a proxy plug-in, a piece of software supplied with WebLogic that will redirect certain requests (for example, those to servlets and JSPs) through to the cluster. Clients accessing the web server then can be served up static content by the web server directly and transparently proxied through to the cluster behind the web server for the dynamic content.
- WebLogic with the
HttpClusterServlet The
HttpClusterServletis an alternative to a proxy plug-in. A WebLogic instance can be configured to host the servlet, which can forward requests across to the cluster in the same way as the proxy plug-in.
The main ways in which you can architect your cluster and web tiers are discussed in much more detail in Chapter 14. Here we will give a brief introduction ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.