| ; (SPRandom) SanDisk Random preconditioning example |
| ; Requirements |
| ; 1. Single file |
| ; 2. Single job (numjobs=1) |
| ; 3. Assumes norandommap=1 |
| ; 4. Assumes random_generator=lfsr |
| ; |
| ; FIO_BS should be set to driver indirection unit (IU) size. |
| ; IU is the smallest unit of data that can be mapped from a LBA |
| ; on the host to a physical location on the SSD's flash memory. |
| ; |
| ; Basic execution example, run with io_uring |
| ; env FIO_BS=4096 \ |
| ; fio --filename=/dev/nvme0n1 --ioengine=io_uring examples/sprandom.fio |
| ; |
| ; Enable debug output for the 'sprandom' module |
| ; env FIO_BS=4096 \ |
| ; fio --debug=sprandom --filename=/dev/nvme0n1 examples/sprandom.fio |
| ; |
| ; Set over-provisioning according to vendor recommendation (21%) |
| ; env FIO_BS=4096 \ |
| ; fio --spr_op=0.21 --filename=/dev/nvme0n1 examples/sprandom.fio |
| ; |
| ; For large devices it is better to use more regions, to increase precision |
| ; and reduce memory allocation. The allocation is proportional to the region size. |
| ; env FIO_BS=4096 \ |
| ; fio --spr_num_regions=400 --filename=/dev/nvme0n1 examples/sprandom.fio |
| ; |
| [global] |
| ioengine=libaio |
| rw=randwrite |
| bs=${FIO_BS} |
| blockalign=${FIO_BS} |
| direct=1 |
| norandommap=1 |
| iodepth=64 |
| [preconditioning] |
| sprandom=1 |
| spr_op=0.15 |
| spr_num_regions=100 |
| |
