str String. This is a sequence of alpha characters.
time Integer with possible time suffix. In seconds unless otherwise
specified, use eg 10m for 10 minutes. Accepts s/m/h for seconds,
- minutes, and hours.
+ minutes, and hours, and accepts 'ms' (or 'msec') for milliseconds,
+ and 'us' (or 'usec') for microseconds.
int SI integer. A whole number value, which may contain a suffix
describing the base of the number. Accepted suffixes are k/m/g/t/p,
meaning kilo, mega, giga, tera, and peta. The suffix is not case
not parsed.
directory=str Prefix filenames with this directory. Used to place files
- in a different location than "./".
+ in a different location than "./". See the 'filename' option
+ for escaping certain characters.
filename=str Fio normally makes up a filename based on the job name,
thread number, and file number. If you want to share
and limited to 'size' in total (if that is given). If not
given, each created file is the same size.
+file_append=bool Perform IO after the end of the file. Normally fio will
+ operate within the size of a file. If this option is set, then
+ fio will append to the file instead. This has identical
+ behavior to setting offset to the size of a file. This option
+ is ignored on non-regular files.
+
fill_device=bool
fill_fs=bool Sets size to something really large and waits for ENOSPC (no
space left on device) as the terminating condition. Only makes
zero_buffers If this option is given, fio will init the IO buffers to
all zeroes. The default is to fill them with random data.
+ The resulting IO buffers will not be completely zeroed,
+ unless scramble_buffers is also turned off.
refill_buffers If this option is given, fio will refill the IO buffers
on every submit. The default is to only fill it at init
allows a range of CPUs. Say you wanted a binding to CPUs
1, 5, and 8-15, you would set cpus_allowed=1,5,8-15.
+cpus_allowed_policy=str Set the policy of how fio distributes the CPUs
+ specified by cpus_allowed or cpumask. Two policies are
+ supported:
+
+ shared All jobs will share the CPU set specified.
+ split Each job will get a unique CPU from the CPU set.
+
+ 'shared' is the default behaviour, if the option isn't
+ specified. If split is specified, then fio will will assign
+ one cpu per job. If not enough CPUs are given for the jobs
+ listed, then fio will roundrobin the CPUs in the set.
+
numa_cpu_nodes=str Set this job running on spcified NUMA nodes' CPUs. The
arguments allow comma delimited list of cpu numbers,
A-B ranges, or 'all'. Note, to enable numa options support,
to repeat the same workload a given number of times. Defaults
to 1.
+verify_only Do not perform specified workload---only verify data still
+ matches previous invocation of this workload. This option
+ allows one to check data multiple times at a later date
+ without overwriting it. This option makes sense only for
+ workloads that write data, and does not support workloads
+ with the time_based option set.
+
do_verify=bool Run the verify phase after a write phase. Only makes sense if
verify is set. Defaults to 1.
crc7 Use a crc7 sum of the data area and store
it in the header of each block.
+ xxhash Use xxhash as the checksum function. Generally
+ the fastest software checksum that fio
+ supports.
+
sha512 Use sha512 as the checksum function.
sha256 Use sha256 as the checksum function.
meta Write extra information about each io
(timestamp, block number etc.). The block
- number is verified. See also verify_pattern.
+ number is verified. The io sequence number is
+ verified for workloads that write data.
+ See also verify_pattern.
null Only pretend to verify. Useful for testing
internals with ioengine=null, not for much
[net] proto=str The network protocol to use. Accepted values are:
tcp Transmission control protocol
+ tcpv6 Transmission control protocol V6
udp User datagram protocol
+ udpv6 User datagram protocol V6
unix UNIX domain socket
When the protocol is TCP or UDP, the port must also be given,
projects / fio.git / blobdiff