How to use fio?

Executing fio is a straightforward process that primarily involves specifying the job file(s) as input parameters. The simplicity lies in the fact that users merely need to invoke the fio command followed by their desired options and the job file(s).

The job file, which serves as the blueprint for the I/O workload, contains detailed instructions on what fio should do. By passing this file to fio, users can automate complex I/O testing scenarios with ease.

The flexibility of fio allows for multiple job files to be specified on the command line, providing users with the ability to run multiple tests concurrently or sequentially. This feature enhances the tool's versatility and makes it suitable for a wide range of testing needs.

When multiple job files are provided, fio serializes their execution, ensuring that each job is run in the order they are specified on the command line. This controlled execution helps maintain the integrity of the testing environment and prevents potential conflicts between concurrent tests.

The serialization of job files also allows users to create complex testing scenarios where one job's output serves as input for another. This capability enables users to simulate real-world scenarios more accurately and gain deeper insights into their storage systems' performance.