HA II (1) - Welcome to: Copyright IBM Corporation 2005...

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Unformatted text preview: Welcome to: Copyright IBM Corporation 2005 Course materials may not be reproduced in whole or in part without the prior written permission of IBM. Workload Management IBM Confidential Copyright IBM Corporation 2005 Unit Objectives After completing this unit, you should be able to: Define workload management Create clusters and cluster members Compare clustered configurations Explain how weights are used in workload management Discuss failover scenarios Describe the role of the HTTP plug-in in workload management Explain session management Configure distributed session management Copyright IBM Corporation 2005 What Is Workload Management (WLM)? Sharing requests across multiple application servers Configuration options that improve: Performance improve response time for requests Scalability grow capacity as the number of users increases Load balancing allocate workload proportionately among available resources Availability applications are still available if a server fails Copyright IBM Corporation 2005 What Can Be Workload Managed? EJB Requests Servlet Requests App Server App Server Web Container Web Container App Server EJB Container App Server EJB Container App Server Web Container Java Client HTTP Requests HTTP Server Plug-in Load Balancer HTTP Server Plug-in HTTP Server Plug-in HTTP(s) HTTP(s) IIOP Copyright IBM Corporation 2005 Clusters Clusters are a set of application servers with the same applications, and grouped logically for workload management Applications installed to the cluster are automatically distributed to the cluster members Creation of a cluster Can use an existing server as the first cluster member Can be created without a server, and have servers and applications added later Additional cluster members are created from templates Cluster members: Run the same applications Share workload Can be centrally administered Are workload managed through the plug-in ClusterMember1 Web Container EJB Container HTTP Server Plug-in ClusterMember2 Web Container EJB Container Plugin- cfg.xml Copyright IBM Corporation 2005 Configurations: Vertical Scaling May provide better performance with multiple processors ClusterMember1 Web Container EJB Container ClusterMember2 Web Container EJB Container Node 1 HTTP Server Plug-in Cluster Node Agent Plugin-cfg.xml Copyright IBM Corporation 2005 Configurations: Horizontal Scaling Supports machine failover ClusterMember1 Web Container EJB Container ClusterMember2 Node 1 HTTP Server Plug-in Cluster Node Agent ClusterMember2 Web Container EJB Container Node 2 Node Agent Plugin-cfg.xml Copyright IBM Corporation 2005 ClusterMember1 Web Container EJB Container ClusterMember2 Web Container EJB Container Node 1 Node Agent Configurations: Vertical and Horizontal Scaling Performance and failover ClusterMember3 Web Container EJB Container ClusterMember4 Web Container...
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This note was uploaded on 02/09/2012 for the course COMPUTER S a303 taught by Professor None during the Spring '11 term at BEM Bordeaux Management School.

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HA II (1) - Welcome to: Copyright IBM Corporation 2005...

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