Survivability-oriented self-tuning of web systems

Running in a highly uncertain and changing environment, Web systems cannot always provide full set of services with optimal quality, especially when the workload is high or failures in subsystems occur frequently. It is thus desirable to continuously maintain a high satisfaction level of the system value proposition, hereafter survivability assurance, while relaxing/sacrificing certain quality/functional requirements that are not crucial to the survival of the Web systems. In this paper, we propose a requirements-driven self-tuning method for survivability assurance of Web systems. Using a value-based feedback controller plus a requirements-oriented reasoner, our method makes both quality and functional requirements tradeoffs decisions at runtime. Categories and Subject Descriptors D.2.10 [Software Engineering]: Design – methodologies. General Terms Algorithms, Reliability, Measurement, Performance Keywords Survivability, Self-Tuning, Value, Requirements, Reasoning

• Type: Journal
• Year: 2011
• Where: WWW
• Authors: Bihuan Chen, Xin Peng, Yijun Yu, Wenyun Zhao
• Keywords: Internet Technology, Requirements-driven Self-tuning Method, Survivability Assurance, Web Systems, WWW 2011