Make pre_read imply invalidate=0

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 9bfa437833d0703e2ee10cac8501c6d40a521d3d..494b3e64d722597405e6a82191f776c1b8bc35d7 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -713,6 +713,11 @@ create_fsync=bool  fsync the data file after creation. This is the
 create_on_open=bool    Don't pre-setup the files for IO, just create open()
                        when it's time to do IO to that file.
 
+pre_read=bool  If this is given, files will be pre-read into memory before
+               starting the given IO operation. This will also clear
+               the 'invalidate' flag, since it is pointless to pre-read
+               and then drop the cache.
+
 unlink=bool    Unlink the job files when done. Not the default, as repeated
                runs of that job would then waste time recreating the file
                set again and again.
@@ -928,6 +933,7 @@ Idle        Run
 P              Thread setup, but not started.
 C              Thread created.
 I              Thread initialized, waiting.
+       p       Thread running pre-reading file(s).
        R       Running, doing sequential reads.
        r       Running, doing random reads.
        W       Running, doing sequential writes.