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AGOCS — Accurate Google Cloud Simulator Framework

This paper presents the Accurate Google Cloud Simulator (AGOCS) – a novel high-fidelity Cloud workload simulator based on parsing real workload traces, which can be conveniently used on a desktop machine for day-to-day research. Our simulation is based on real-world workload traces from a Google Cluster with 12.5K nodes, over a period of a calendar month. The framework is able to reveal very precise, detailed parameters of the executed jobs, tasks, nodes as well as to provide actual resource usage statistics. The system has been implemented in Scala language with focus on parallel execution, an easy-to-extend design concept. The paper presents the detailed structural framework for AGOCS, discusses our main design decisions, whilst also suggesting alternative, possibly performance enhancing future approaches. The framework is available via the Open Source GitHub repository.