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TIBCO GridServer® 7.1.0

# Scheduling

One of the responsibilities of Brokers is scheduling, which is the management of Services and tasks on Engines and interactions between Engines and Drivers. This section gives more details on how scheduling works, and the method used to determine what tasks in a Service are sent to what Engines.

Most of the time, the scheduling of Services and tasks on Engines is completely transparent and requires no administration. However, to tune performance, or to diagnose and resolve problems, it is helpful to have a basic understanding of how the Broker manages scheduling.

Recall that clients create Service Sessions on the Broker. Each Service Session consists of one or more tasks, which might be performed in any order. The scheduler determines the optimal match of Engines to Services. Whenever an Engine reports to the Broker to request work, the Broker assigns a task from that Service to the Engine. When an Engine completes a task, it is queued on the Broker for collection by the client. If an Engine is interrupted during processing, the task is requeued by the Broker.

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