--latency-log Generate per-job latency logs
--bandwidth-log Generate per-job bandwidth logs
--minimal Minimal (terse) output
+ --output-format=type Output format (terse,json,normal)
+ --terse-version=type Terse version output format (default 3, or 2 or 4).
--version Print version info and exit
- --terse-version=type Terse version output format (default 3, or 2).
--help Print this page
--cmdhelp=cmd Print command help, "all" for all of them
--enghelp=engine Print ioengine help, or list available ioengines
readv/writev (with queuing emulation) mmap for mmap'ed
io, syslet-rw for syslet driven read/write, splice for
using splice/vmsplice, sg for direct SG_IO io, net
- for network io, or cpuio for a cycler burner load. sg
- only works on Linux on SCSI (or SCSI-like devices, such
- as usb-storage or sata/libata driven) devices. Fio also
- has a null io engine, which is mainly used for testing
+ for network io, rdma for RDMA io, or cpuio for a
+ cycler burner load. sg only works on Linux on
+ SCSI (or SCSI-like devices, such as 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
ratecycle=x ratemin averaged over x msecs
cpumask=x Only allow job to run on CPUs defined by mask.
cpus_allowed=x Like 'cpumask', but allow text setting of CPU affinity.
+ numa_cpu_nodes=x,y-z Allow job to run on specified NUMA nodes' CPU.
+ numa_mem_policy=m:x,y-z Setup numa memory allocation policy.
+ 'm' stands for policy, such as local, interleave,
+ bind, prefer, local. 'x, y-z' are numa node(s) for
+ memory allocation according to policy.
fsync=x If writing with buffered IO, fsync after every
'x' blocks have been written.
end_fsync=x If 'x', run fsync() after end-of-job.