This guide examines the tradeoffs between open-source and commercial HPC software, focusing on workload management as a critical determinant of productivity and return on investment. It outlines six key evaluation criteria, including cluster administration complexity, resource efficiency, development and integration costs, support requirements, and downtime risk. While acknowledging the innovation benefits of open-source software, the guide highlights hidden costs and operational risks that can undermine enterprise environments. It demonstrates how commercial workload managers deliver superior reliability, scalability, license-aware scheduling, and cloud integration. Real-world cost models show that modest efficiency gains can translate into significant financial returns, positioning comme

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