files between threads in a job or several jobs, specify
a filename for each of them to override the default. If
the ioengine used is 'net', the filename is the host, port,
- and protocol to use in the format of =host/port/protocol.
+ and protocol to use in the format of =host,port,protocol.
See ioengine=net for more. If the ioengine is file based, you
can specify a number of files by separating the names with a
':' colon. So if you wanted a job to open /dev/sda and /dev/sdb
isn't specified, naturally. If data verification is enabled,
refill_buffers is also automatically enabled.
+scramble_buffers=bool If refill_buffers is too costly and the target is
+ using data deduplication, then setting this option will
+ slightly modify the IO buffer contents to defeat normal
+ de-dupe attempts. This is not enough to defeat more clever
+ block compression attempts, but it will stop naive dedupe of
+ blocks. Default: true.
+
nrfiles=int Number of files to use for this job. Defaults to 1.
openfiles=int Number of files to keep open at the same time. Defaults to
libaio Linux native asynchronous io. Note that Linux
may only support queued behaviour with
non-buffered IO (set direct=1 or buffered=0).
+ This engine also has a sub-option,
+ userspace_reap. To set it, use
+ ioengine=libaio:userspace_reap. Normally, with
+ the libaio engine in use, fio will use the
+ io_getevents system call to reap newly returned
+ events. With this flag turned on, the AIO ring
+ will be read directly from user-space to reap
+ events. The reaping mode is only enabled when
+ polling for a minimum of 0 events (eg when
+ iodepth_batch_complete=0).
posixaio glibc posix asynchronous io.
bwavgtime=int Average the calculated bandwidth over the given time. Value
is specified in milliseconds.
+iopsavgtime=int Average the calculated IOPS over the given time. Value
+ is specified in milliseconds.
+
create_serialize=bool If true, serialize the file creating for the jobs.
This may be handy to avoid interleaving of data
files, which may greatly depend on the filesystem
and foo_lat.log. This helps fio_generate_plot fine the logs
automatically.
+write_bw_log=str If given, write an IOPS log of the jobs in this job
+ file. See write_bw_log.
+
lockmem=int Pin down the specified amount of memory with mlock(2). Can
potentially be used instead of removing memory or booting
with less memory to simulate a smaller amount of memory.
version, jobname, groupid, error
READ status:
- KB IO, bandwidth (KB/sec), runtime (msec)
+ Total IO (KB), bandwidth (KB/sec), runtime (msec)
Submission latency: min, max, mean, deviation
Completion latency: min, max, mean, deviation
Total latency: min, max, mean, deviation
Bw: min, max, aggregate percentage of total, mean, deviation
WRITE status:
- KB IO, bandwidth (KB/sec), runtime (msec)
+ Total IO (KB), bandwidth (KB/sec), runtime (msec)
Submission latency: min, max, mean, deviation
Completion latency: min, max, mean, deviation
Total latency: min, max, mean, deviation