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$ fio
- -t <sec> Runtime in seconds
- -l Generate per-job latency logs
- -w Generate per-job bandwidth logs
- -o <file> Log output to file
- -m Minimal (terse) output
- -h Print help info
- -v Print version information and exit
+ --output Write output to file
+ --timeout Runtime in seconds
+ --latency-log Generate per-job latency logs
+ --bandwidth-log Generate per-job bandwidth logs
+ --minimal Minimal (terse) output
+ --version Print version info and exit
-Any parameters following the options will be assumed to be job files.
-You can add as many as you want, each job file will be regarded as a
-separate group and fio will stonewall it's execution.
+Any parameters following the options will be assumed to be job files,
+unless they match a job file parameter. You can add as many as you want,
+each job file will be regarded as a separate group and fio will stonewall
+its execution.
Job file
mmap for mmap'ed io, splice for using splice/vmsplice,
or sgio for direct SG_IO io. The latter only works on
Linux on SCSI (or SCSI-like devices, such as
- usb-storage or sata/libata driven) devices.
+ usb-storage or sata/libata driven) devices. Fio also
+ has a null io engine, which is mainly used for testing
+ fio itself.
iodepth=x For async io, allow 'x' ios in flight
overwrite=x If 'x', layout a write file first.
nrfiles=x Spread io load over 'x' number of files per job,