HOWTO: update to include iolog replay

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index cf1024cff4dbb2a7f8ee888cae6d21d511b5096d..3f8acee15221f321a8838fa907759d3d96455e2e 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1558,10 +1558,10 @@ read_iolog=str  Open an iolog with the specified file name and replay the
 
 replay_no_stall=int When replaying I/O with read_iolog the default behavior
                is to attempt to respect the time stamps within the log and
-               replay them with the appropriate delay between IOPS.  By
+               replay them with the appropriate delay between IOPS. By
                setting this variable fio will not respect the timestamps and
                attempt to replay them as fast as possible while still
-               respecting ordering.  The result is the same I/O pattern to a
+               respecting ordering. The result is the same I/O pattern to a
                given device, but different timings.
 
 replay_redirect=str While replaying I/O patterns using read_iolog the
@@ -1573,13 +1573,14 @@ replay_redirect=str While replaying I/O patterns using read_iolog the
                mapping.  Replay_redirect causes all IOPS to be replayed onto
                the single specified device regardless of the device it was
                recorded from. i.e. replay_redirect=/dev/sdc would cause all
-               IO in the blktrace to be replayed onto /dev/sdc.  This means
-               multiple devices will be replayed onto a single, if the trace
-               contains multiple devices.  If you want multiple devices to be
-               replayed concurrently to multiple redirected devices you must
-               blkparse your trace into separate traces and replay them with
-               independent fio invocations.  Unfortuantely this also breaks
-               the strict time ordering between multiple device accesses.
+               IO in the blktrace or iolog to be replayed onto /dev/sdc.
+               This means multiple devices will be replayed onto a single
+               device, if the trace contains multiple devices. If you want
+               multiple devices to be replayed concurrently to multiple
+               redirected devices you must blkparse your trace into separate
+               traces and replay them with 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.