Automatic Configuration of an Autonomic Controller: An Experimental Study with Zero-Configuration Policies
Autonomic control managers can remove the need for manual system configuration in order to achieve good performance and efficient resource utilization. However, simple controllers based on reconfiguration actions tied to thresholds, or 'if-then' rules, themselves need to be configured and tuned in order to adapt the controller behavior to the expected workload characteristic. In this paper we present an experimental study of zero-configuration policies that can be automatically tuned based on analytical models of the system under control. In particular, we have designed and implemented a threshold-free self-configuration policy for a distributed workflow execution engine and compared it with a standard PID controller. The experimental results included in the paper show that using such a policy the controller can tune itself in addition to reconfiguring the distributed engine and the proposed policy out-performs simpler policies that require manual and error-prone tuning of their parameters.
Keywords: control system synthesis ; three-term controlPID control ; automatic configuration ; autonomic controller ; distributed workflow execution engine ; error-prone tuning ; if-then rules ; resource utilization ; threshold-free self-configuration policy ; workload characteristic ; zero-configuration policies
Record created on 2009-09-07, modified on 2016-08-08