Documentation update

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 8f7320835c914ea54820a4b35330a8cb2d06205d..2be845c4add2f7ce6c7cebc4d95ca9ce9083622a 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -546,7 +546,9 @@ rwmixread=int       How large a percentage of the mix should be reads.
 rwmixwrite=int How large a percentage of the mix should be writes. If both
                rwmixread and rwmixwrite is given and the values do not add
                up to 100%, the latter of the two will be used to override
 rwmixwrite=int How large a percentage of the mix should be writes. If both
                rwmixread and rwmixwrite is given and the values do not add
                up to 100%, the latter of the two will be used to override

-               the first.
+               the first. This may interfere with a given rate setting,
+               if fio is asked to limit reads or writes to a certain rate.
+               If that is the case, then the distribution may be skewed.

 
 norandommap    Normally fio will cover every block of the file when doing
                random IO. If this option is given, fio will just get a
 
 norandommap    Normally fio will cover every block of the file when doing
                random IO. If this option is given, fio will just get a