Fio
Fio (Flexible I/O Tester) is an open-source benchmarking and stress-testing tool for storage systems, including disks, SSDs, and network storage. It allows users to simulate various I/O workloads to measure performance metrics like throughput, latency, and IOPS. It is widely used by system administrators, developers, and storage engineers to validate hardware, optimize configurations, and troubleshoot I/O bottlenecks.
Developers should learn Fio when they need to benchmark storage performance for applications that are I/O-intensive, such as databases, big data processing, or high-performance computing. It is essential for ensuring storage systems meet performance requirements, comparing different hardware or configurations, and diagnosing slow I/O issues in production or development environments.