X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=36e42aaf6b9defb210d83d0b538284bea7f6a4d6;hp=66ebebe8579dd5954e574bf016c31b5fbd0e5baf;hb=5973cafb37fbf24c3ca2cdf86a3d03f1b00d6d2b;hpb=47d85e2bd4763204a983c7bf4833c0d466dc36ca

diff --git a/HOWTO b/HOWTO
index 66ebebe8..36e42aaf 100644
--- a/HOWTO
+++ b/HOWTO
@@ -336,6 +336,11 @@ bs_unaligned	If this option is given, any byte size value within bsrange
 zero_buffers	If this option is given, fio will init the IO buffers to
 		all zeroes. The default is to fill them with random data.
 
+refill_buffers	If this option is given, fio will refill the IO buffers
+		on every submit. The default is to only fill it at init
+		time and reuse that data. Only makes sense if zero_buffers
+		isn't specified, naturally.
+
 nrfiles=int	Number of files to use for this job. Defaults to 1.
 
 openfiles=int	Number of files to keep open at the same time. Defaults to
@@ -454,7 +459,11 @@ fsync=int	If writing to a file, issue a sync of the dirty data
 		not sync the file. The exception is the sg io engine, which
 		synchronizes the disk cache anyway.
 
-overwrite=bool	If writing to a file, setup the file first and do overwrites.
+overwrite=bool	If true, writes to a file will always overwrite existing
+		data. If the file doesn't already exist, it will be
+		created before the write phase begins. If the file exists
+		and is large enough for the specified write phase, nothing
+		will be done.
 
 end_fsync=bool	If true, fsync file contents when the job exits.
 
@@ -462,10 +471,6 @@ fsync_on_close=bool	If true, fio will fsync() a dirty file on close.
 		This differs from end_fsync in that it will happen on every
 		file close, not just at the end of the job.
 
-rwmixcycle=int	Value in milliseconds describing how often to switch between
-		reads and writes for a mixed workload. The default is
-		500 msecs.
-
 rwmixread=int	How large a percentage of the mix should be reads.
 
 rwmixwrite=int	How large a percentage of the mix should be writes. If both