absolute or relative. See :file:`engines/skeleton_external.c` for
details of writing an external I/O engine.
+ **filecreate**
+ Simply create the files and do no IO to them. You still need to
+ set `filesize` so that all the accounting still occurs, but no
+ actual IO will be done other than creating the file.
I/O engine specific parameters
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. option:: clat_percentiles=bool
- Enable the reporting of percentiles of completion latencies.
+ Enable the reporting of percentiles of completion latencies. This
+ option is mutually exclusive with :option:`lat_percentiles`.
+
+.. option:: lat_percentiles=bool
+
+ Enable the reporting of percentiles of IO latencies. This is similar
+ to :option:`clat_percentiles`, except that this includes the
+ submission latency. This option is mutually exclusive with
+ :option:`clat_percentiles`.
.. option:: percentile_list=float_list