Transformation-Based Optimizations Framework (ToF) for Workflows and its Security Issues in the Cloud Computing
A general transformation-based optimization framework for workflows in the cloud. Specifically, Transformation-based Optimizations Framework (ToF) formulates six basic workflow transformation operations. An arbitrary performance and cost optimization process can be represented as a transformation plan (i.e., a sequence of basic transformation operations). All transformations form a huge optimization space. The authors further develop a cost model guided planner to efficiently find the optimized transformation for a predefined goal and their experimental results demonstrate the effectiveness of ToF in optimizing the performance and cost in comparison with other existing approaches. Cloud computing offers its customers an economical and convenient pay-as-you-go service model, known also as usage based pricing.