Update documentation for 'replay_skip'

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 8ee00fd1210dbf7089f5b58b270f46ebb41c2721..d200700961c91174c1f0075eccd6a3ee0eb29ce8 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -2346,6 +2346,14 @@ I/O replay
 
        Scale sector offsets down by this factor when replaying traces.
 
+.. option:: replay_skip=str
+
+       Sometimes it's useful to skip certain IO types in a replay trace.
+       This could be, for instance, eliminating the writes in the trace.
+       Or not replaying the trims/discards, if you are redirecting to
+       a device that doesn't support them. This option takes a comma
+       separated list of read, write, trim, sync.
+
 
 Threads, processes and job synchronization
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~