Performance evaluation of cloud computing accounting for expenses on information security

An approach to the performance evaluation of cloud computing accounting for the expenses on information security is proposed. For this purpose the model of multi-channel non-Markov queueing system with a “warm-up” is used. When applied to information security at cloud computing warm-up can be understood as: user/terminal authentication, network encryption, caching database queries, on-demand resource allocation, etc. The study demonstrates the influence of the “warm-up” process on the cloud computing performance and shows the need to collect data and examine “warm-up” patterns to assure that the system capabilities are appropriate for significantly different levels and patterns of demand. Obtained results of numerical experiments show the influence patterns which the “warm-up” process has on the system performance.