Add a note of what is the default value for random_generator

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 7c24c1b74296aa33cdff97eca9458defd291b6ca..4a910a1ac11716d57c3885cf2c2f4fd63f0fa944 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1013,7 +1013,9 @@ random_generator=str      Fio supports the following engines for generating
                typically good enough. LFSR only works with single
                block sizes, not with workloads that use multiple block
                sizes. If used with such a workload, fio may read or write
-               some blocks multiple times.
+               some blocks multiple times. The default value is tausworthe,
+               unless the required space exceeds 2^32 blocks. If it does,
+               then tausworthe64 is selected automatically.
 
 nice=int       Run the job with the given nice value. See man nice(2).