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Developing Accurate and Scalable Simulators of Production Workflow Management Systems with WRENCH

Abstract : Scientific workflows are used routinely in numerous scientific domains, and Workflow Management Systems (WMSs) have been developed to orchestrate and optimize workflow executions on distributed platforms. WMSs are complex software systems that interact with complex software infrastructures. Most WMS research and development activities rely on empirical experiments conducted with full-fledged software stacks on actual hardware platforms. These experiments, however, are limited to hardware and software infrastructures at hand and can be labor-and/or time-intensive. As a result, relying solely on real-world experiments impedes WMS research and development. An alternative is to conduct experiments in simulation. In this work we present WRENCH, a WMS simulation framework, whose objectives are (i) accurate and scalable simulations; and (ii) easy simulation software development. WRENCH achieves its first objective by building on the SimGrid framework. While SimGrid is recognized for the accuracy and scalability of its simulation models, it only provides low-level simulation abstractions and thus large software development efforts are required when implementing simulators of complex systems. WRENCH thus achieves its second objective by providing high-level and directly re-usable simulation abstractions on top of SimGrid. After describing and giving rationales for WRENCH's software architecture and APIs, we present two case studies in which we apply WRENCH to simulate the Pegasus production WMS and the WorkQueue application execution framework. We report on ease of implementation, simulation accuracy, and simulation scalability so as to determine to which extent WRENCH achieves its objectives. We also draw both qualitative and quantitative comparisons with a previously proposed workflow simulator.
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Submitted on : Tuesday, June 23, 2020 - 9:24:51 AM
Last modification on : Thursday, May 12, 2022 - 5:08:02 PM
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Henri Casanova, Rafael Ferreira da Silva, Ryan Tanaka, Suraj Pandey, Gautam Jethwani, et al.. Developing Accurate and Scalable Simulators of Production Workflow Management Systems with WRENCH. Future Generation Computer Systems, Elsevier, 2020, 112, pp.162-175. ⟨10.1016/j.future.2020.05.030⟩. ⟨hal-02878322⟩



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