random: document default seed value

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index bb29826428574a77f0352e279155c4b6adb2cea0..d62d4089fb9d633892e60290f0917530c9411f5b 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -435,6 +435,7 @@ unified_rw_reporting=bool   Fio normally reports statistics on a per
 
 randrepeat=bool        For random IO workloads, seed the generator in a predictable
                way so that results are repeatable across repetitions.
+               Defaults to true.
 
 randseed=int   Seed the random number generators based on this seed value, to
                be able to control what sequence of output is being generated.
@@ -1433,6 +1434,12 @@ replay_redirect=str While replaying I/O patterns using read_iolog the
                independent fio invocations.  Unfortuantely this also breaks
                the strict time ordering between multiple device accesses.
 
+replay_align=int       Force alignment of IO offsets and lengths in a trace
+               to this power of 2 value.
+
+replay_scale=int       Scale sector offsets down by this factor when
+               replaying traces.
+
 write_bw_log=str If given, write a bandwidth log of the jobs in this job
                file. Can be used to store data of the bandwidth of the
                jobs in their lifetime. The included fio_generate_plots