-------------------------
fio also supports environment variable expansion in job files. Any
-substring of the form "${VARNAME}" as part of an option value (in other
+sub-string of the form "${VARNAME}" as part of an option value (in other
words, on the right of the `='), will be expanded to the value of the
environment variable called VARNAME. If no such environment variable
is defined, or VARNAME is the empty string, the empty string will be
fdatasync=int Like fsync= but uses fdatasync() to only sync data and not
metadata blocks.
- In FreeBSD and Windows there is no fdatasync(), this falls back to
- using fsync()
+ In FreeBSD and Windows there is no fdatasync(), this falls back
+ to using fsync()
sync_file_range=str:val Use sync_file_range() for every 'val' number of
write operations. Fio will track range of writes that
terse version, fio version, jobname, groupid, error
READ status:
Total IO (KB), bandwidth (KB/sec), IOPS, runtime (msec)
- Submission latency: min, max, mean, deviation (usec)
- Completion latency: min, max, mean, deviation (usec)
+ Submission latency: min, max, mean, stdev (usec)
+ Completion latency: min, max, mean, stdev (usec)
Completion latency percentiles: 20 fields (see below)
- Total latency: min, max, mean, deviation (usec)
- Bw (KB/s): min, max, aggregate percentage of total, mean, deviation
+ Total latency: min, max, mean, stdev (usec)
+ Bw (KB/s): min, max, aggregate percentage of total, mean, stdev
WRITE status:
Total IO (KB), bandwidth (KB/sec), IOPS, runtime (msec)
- Submission latency: min, max, mean, deviation (usec)
- Completion latency: min, max, mean, deviation (usec)
+ Submission latency: min, max, mean, stdev (usec)
+ Completion latency: min, max, mean, stdev(usec)
Completion latency percentiles: 20 fields (see below)
- Total latency: min, max, mean, deviation (usec)
- Bw (KB/s): min, max, aggregate percentage of total, mean, deviation
+ Total latency: min, max, mean, stdev (usec)
+ Bw (KB/s): min, max, aggregate percentage of total, mean, stdev
CPU usage: user, system, context switches, major faults, minor faults
IO depths: <=1, 2, 4, 8, 16, 32, >=64
IO latencies microseconds: <=2, 4, 10, 20, 50, 100, 250, 500, 750, 1000