X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=a20f7141e63593dd8ed54b696ab80c92e28695a4;hb=01680f3fe5925380c8a8783abbd30b387d9702ba;hp=569b998f215b78d41a36ac71d78f1506a013af4e;hpb=564ca97254984165e06d5fd4b1270bac95ca55fb;p=fio.git

diff --git a/HOWTO b/HOWTO
index 569b998f..a20f7141 100644
--- a/HOWTO
+++ b/HOWTO
@@ -262,6 +262,10 @@ filesize=siint	Individual file sizes. May be a range, in which case fio
 		and limited to 'size' in total (if that is given). If not
 		given, each created file is the same size.
 
+fill_device=bool Sets size to something really large and waits for ENOSPC (no
+		space left on device) as the terminating condition. Only makes
+                sense with sequential write.
+
 blocksize=siint
 bs=siint	The block size used for the io units. Defaults to 4k. Values
 		can be given for both read and writes. If a single siint is
@@ -398,8 +402,9 @@ iodepth=int	This defines how many io units to keep in flight against
 		concurrency.
 
 iodepth_batch=int This defines how many pieces of IO to submit at once.
-		It defaults to the same as iodepth, but can be set lower
-		if one so desires.
+		It defaults to 1 which means that we submit each IO
+		as soon as it is available, but can be raised to submit
+		bigger batches of IO at the time.
 
 iodepth_low=int	The low water mark indicating when to start filling
 		the queue again. Defaults to the same as iodepth, meaning
@@ -625,15 +630,6 @@ verify=str	If writing to a file, fio can verify the file contents
 				(timestamp, block number etc.). The block
 				number is verified.
 
-			pattern	Fill the IO buffers with a specific pattern,
-				that we can use to verify. Depending on the
-				width of the pattern, fio will fill 1/2/3/4
-				bytes of the buffer at the time. The pattern
-				cannot be larger than a 32-bit quantity. The
-				given pattern is given as a postfix to this
-				option, ala: verify=pattern:0x5a. It accepts
-				both hex and dec values.
-
 			null	Only pretend to verify. Useful for testing
 				internals with ioengine=null, not for much
 				else.
@@ -659,6 +655,14 @@ verify_interval=siint	Write the verification header at a finer granularity
 			size of header_interval. blocksize should divide this
 			evenly.
 
+verify_pattern=int	If set, fio will fill the io buffers with this
+		pattern. Fio defaults to filling with totally random
+		bytes, but sometimes it's interesting to fill with a known
+		pattern for io verification purposes. Depending on the
+		width of the pattern, fio will fill 1/2/3/4 bytes of the
+		buffer at the time. The verify_pattern cannot be larger than
+		a 32-bit quantity.
+
 verify_fatal=bool	Normally fio will keep checking the entire contents
 		before quitting on a block verification failure. If this
 		option is set, fio will exit the job on the first observed