@INPROCEEDINGS{Pietri2013, AUTHOR="Marcello Pietri and Stefania Tosi and Mauro Andreolini and Michele Colajanni", TITLE="{Real-Time} Adaptive Algorithm for Resource Monitoring", BOOKTITLE="9th International Conference on Network and Service Management 2013 (CNSM 2013)", ADDRESS="Zürich, Switzerland", DAYS=14, MONTH=Oct, YEAR=2013, pages = {67-74}, KEYWORDS="Adaptive Sampling; Monitoring; Cloud Computing; Large-Scale; Scalability", ABSTRACT="In large scale systems, real-time monitoring of hardware and software resources is a crucial means for any management purpose. In architectures consisting of thousands of servers and hundreds of thousands of component resources, the amount of data monitored at high sampling frequencies represents an overhead on system performance and communication, while reducing sampling may cause quality degradation. We present a real-time adaptive algorithm for scalable data monitoring that is able to adapt the frequency of sampling and data updating for a twofold goal: to minimize computational and communication costs, to guarantee that reduced samples do not affect the accuracy of information about resources. Experiments carried out on heterogeneous data traces referring to synthetic and real environments confirm that the proposed adaptive approach reduces utilization and communication overhead without penalizing the quality of data with respect to existing monitoring algorithms." }