| Using ClusterCATS |
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Installing ClusterCATS |
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| Using ClusterCATS |
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Installing ClusterCATS |
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When you have successfully installed ClusterCATS on all members of the cluster and any administrative computers, you are ready to create your first cluster.
If you administer ClusterCATS from a Windows computer, you can use the Cluster Setup Wizard described in "Creating clusters with the Cluster Setup Wizard", or manually create the cluster using the procedure described in "Creating clusters".
If you administer ClusterCATS from a UNIX computer, see "Creating clusters in UNIX".
Regardless of the method you use to create your first cluster, you should familiarize yourself with the procedures in the following table when implementing your web applications in a clustered environment:
| Option |
Description |
|---|---|
| Load thresholds for servers |
Two response time thresholds configured for each server. THe first defines maximum or busy load; the second activates load management. If the load for the server exceeds the busy threshold, no new sessions can start on that server. If another server in the cluster has the capacity to handle additional users, requests are redirected to it. The load management activation threshold is referred to as the gradual redirection threshold and is designed to prevent the server from reaching the peak threshold. For more information, see "Server load thresholds". |
| Email addresses for alarm recipients |
ClusterCATS generates alarm notifications for several events, including HTTP server failures, low disk space, server busy, and web server failover. You provide e-mail addresses of all administrators for ClusterCATS to notify for each generated alarm notification. For more information, see "Administrator alarm notifications". |
| Session-aware load balancing |
If your web applications use session variables that store information in web server memory, you should enable session-aware load balancing. This feature prevents users who have established a session from being redirected to another server as a result of load balancing. For more information, see "Session-aware load balancing". |
| Administering with the ClusterCATS Web Explorer |
If you use a UNIX computer to administer your cluster with ClusterCATS Web Explorer, you must configure your web server to host the Web Explorer pages. For more information, see "Configuring the communications port on your web server". |
| Administrative authentication |
Password protect administrative access to your cluster members using domain accounts (NT only) or local accounts on each system (UNIX and NT). Administrative users must also be members of the group sys, or a special BT_<clustername> group.For more information, see "Administering security". |