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You can arrange TIBCO Enterprise Message Service servers for fault-tolerant operation by configuring a pair of servers—one primary and one backup. The primary server accepts client connections, and interacts with clients to deliver messages. If the primary server fails, the backup server resumes operation in its place. (We do not support more than two servers in a fault-tolerant configuration.)A pair of fault-tolerant servers can have access to shared state, which consists of information about client connections and persistent messages. This information enables the backup server to properly assume responsibility for those connections and messages. Figure 23 illustrates a fault-tolerant configuration of EMS.Unshared State FailoverFigure 24 illustrates an unshared state fault-tolerant configuration of EMS.
When fault-tolerant servers share configuration files, you must limit configuration changes to the current primary server only. Separately reconfiguring the backup server can cause it to overwrite the shared configuration files; unintended misconfiguration can result.
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Copyright © TIBCO Software Inc. All Rights Reserved |