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A QoS guarantee on heterogeneous clusters has become very important need in today's real time system. Many of real time applications have different Quality of Service (QoS) requirements including reliability, security, data accuracy, data quality and so on. This paper gives study Self-Adaptive QoS-Aware (SAQA) algorithm with QoS requirement of data quality designed for soft real time system, QoS-Aware Fault Tolerant (QAFT) algorithm with QoS requirement of reliability designed for hard real time system and Two-Phase Scheduling Strategy (TPSS) with QoS requirement of security for security-critical real-time applications.
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