| # This job file demonstrates the use of the 'sequence' random distribution. |
| # The 'sequence' distribution allows you to specify a precise, deterministic |
| # order of block indices to be accessed during a non-sequential workload. |
| # |
| # See HOWTO.rst for full documentation. |
| |
| [global] |
| ioengine=null |
| rw=randread |
| bs=4k |
| size=48k |
| io_size=24k |
| |
| # ============================================================================== |
| # Job 1: Fixed Repeating Sequence |
| # ============================================================================== |
| # With random_sequence_stride=0 (default), fio repeats the absolute block |
| # indices (2, then 0, then 1) over and over until io_size is reached. |
| # |
| # Accessed block indices: 2, 0, 1, 2, 0, 1 |
| [repeating_sequence] |
| random_distribution=sequence:2,0,1 |
| random_sequence_stride=0 |
| |
| # ============================================================================== |
| # Job 2: Progressing Strided Sequence |
| # ============================================================================== |
| # With random_sequence_stride=1, the sequence is treated as a relative pattern |
| # inside a moving block group. After each cycle, the base index advances by |
| # the length of the sequence, scanning through the file. |
| # |
| # Accessed block indices: |
| # - Cycle 1 (Group 0): 2, 0, 1 |
| # - Cycle 2 (Group 1): 5, 3, 4 |
| [strided_sequence] |
| stonewall |
| random_distribution=sequence:2,0,1 |
| random_sequence_stride=1 |
