blktrace: add support for scaling and aligning replays

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index bb29826428574a77f0352e279155c4b6adb2cea0..0808cc3a07e0f53a62c3476b6789f47426917829 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1433,6 +1433,12 @@ 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