[PATCH] rusage stat

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 1176d2287f815439c680a38249a104682fcae64a..a5caea3db7a6201d74311b50a5d5d56bbbb77311 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -264,6 +264,10 @@ ioengine=str       Defines how the job issues io to the file. The following
                                we use read(2) and write(2) for asynchronous
                                io.
 
+                       null    Doesn't transfer any data, just pretends
+                               to. This is mainly used to exercise fio
+                               itself and for debugging/testing purposes.
+
 iodepth=int    This defines how many io units to keep in flight against
                the file. The default is 1 for each file defined in this
                job, can be overridden with a larger value for higher