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WebSphere Application Server Topology Options
This document discusses different WebSphere Application Server topologies: - A stand-alone server topology involves installing WAS on a single machine with one application server and no load balancing or high availability. - A vertical scaling topology uses a cluster of three servers to perform basic load balancing at the web server level. - A horizontal scaling topology creates logical server units across multiple systems that can each handle requests, without requiring an IP sprayer. - A horizontal scaling topology with a load balancer has two active web servers that perform load balancing between application servers through the web server plugin, with the load balancer spraying requests to the web servers. - A reverse proxy topology typically uses proxy servers in a DMZ configuration for added security and
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WebSphere Application Server Topology Options
- 1. © 2009 IBMCorporation WebSphere Application Server Topology
- 2. © 2009 IBMCorporation Stand-alone server topology • Installation of WAS on one single (physical) machine or logical partition (LPAR) with one application server only. • No load balancing or high availability at all
- 3. © 2009 IBMCorporation Vertical scaling topology • This vertical scaling example includes a cluster and three cluster members. • Basic load balancing is performed at the Web server plug-in level based on a weighted round-robin algorithm
- 4. © 2009 IBMCorporation Horizontal scaling topology • Horizontal scaling means to create one logical unit of servers across multiple systems or LPARs where each member of the unit is able to serve each request. • Does not require an IP sprayer, but if you want to scale at the Web server tier as well, then it will require an IP sprayer
- 5. © 2009 IBMCorporation Horizontal scaling topology (with Load Balancer) Both Web servers are active at the same time and perform load balancing and failover between the application servers in the cluster through the Web server plug-in. The active Load Balancer sprays requests to the Web servers.
- 6. © 2009 IBMCorporation Reverse proxy topology Reverse proxy servers, like the one provided with the Edge components or the DMZ secure proxy, are typically used in DMZ configurations for two major reasons: To provide additional security between the public Internet and the Web servers (and application servers) To increase performance and reduce the load on the servers by content caching
- 7. © 2009 IBMCorporation Topology with redundancy of multiple components