Add softrandommap and --alloc-size options

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 3d9229338a11c9628f18d61a2a13e6cdc8b1c263..66ebebe8579dd5954e574bf016c31b5fbd0e5baf 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -482,6 +482,12 @@ norandommap        Normally fio will cover every block of the file when doing
                fio doesn't track potential block rewrites which may alter
                the calculated checksum for that block.
 
+softrandommap  See norandommap. If fio runs with the random block map enabled
+               and it fails to allocate the map, if this option is set it
+               will continue without a random block map. As coverage will
+               not be as complete as with random maps, this option is
+               disabled by default.
+
 nice=int       Run the job with the given nice value. See man nice(2).
 
 prio=int       Set the io priority value of this job. Linux limits us to