Add support for Fusion-io atomic write engine

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 73e82653f5e1c8315a2987a1c96e4458162a4507..025443be406669ece150b28858c67ed9cb2f56d9 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -320,7 +320,7 @@ rw=str              Type of io pattern. Accepted values are:
                one by appending a ':<nr>' to the end of the string given.
                For a random read, it would look like 'rw=randread:8' for
                passing in an offset modifier with a value of 8. If the
-               postfix is used with a sequential IO pattern, then the value
+               suffix is used with a sequential IO pattern, then the value
                specified will be added to the generated offset for each IO.
                For instance, using rw=write:4k will skip 4k for every
                write. It turns sequential IO into sequential IO with holes.
@@ -893,6 +893,11 @@ create_fsync=bool  fsync the data file after creation. This is the
 create_on_open=bool    Don't pre-setup the files for IO, just create open()
                        when it's time to do IO to that file.
 
+create_only=bool       If true, fio will only run the setup phase of the job.
+                       If files need to be laid out or updated on disk, only
+                       that will be done. The actual job contents are not
+                       executed.
+
 pre_read=bool  If this is given, files will be pre-read into memory before
                starting the given IO operation. This will also clear
                the 'invalidate' flag, since it is pointless to pre-read
@@ -1107,8 +1112,8 @@ write_bw_log=str If given, write a bandwidth log of the jobs in this job
                file. Can be used to store data of the bandwidth of the
                jobs in their lifetime. The included fio_generate_plots
                script uses gnuplot to turn these text files into nice
-               graphs. See write_log_log for behaviour of given
-               filename. For this option, the postfix is _bw.log.
+               graphs. See write_lat_log for behaviour of given
+               filename. For this option, the suffix is _bw.log.
 
 write_lat_log=str Same as write_bw_log, except that this option stores io
                submission, completion, and total latencies instead. If no
@@ -1448,6 +1453,9 @@ io_queue= Total time spent in the disk queue.
 util=          The disk utilization. A value of 100% means we kept the disk
                busy constantly, 50% would be a disk idling half of the time.
 
+It is also possible to get fio to dump the current output while it is
+running, without terminating the job. To do that, send fio the USR1 signal.
+
 
 7.0 Terse output
 ----------------