X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=2335a07ffc142366cbf652d8caffca542ea9f2ab;hp=a2de47067cdd11ba4ca541cae8e46910c083cda6;hb=19a9409009c6ef4eff9342c5aa291acaa09dccd2;hpb=d3a623deee774b82e4f92c6b9b4b0233b0f4454c

diff --git a/HOWTO b/HOWTO
index a2de4706..2335a07f 100644
--- a/HOWTO
+++ b/HOWTO
@@ -443,9 +443,11 @@ bs=int		The block size used for the io units. Defaults to 4k. Values
 		can be given for both read and writes. If a single int is
 		given, it will apply to both. If a second int is specified
 		after a comma, it will apply to writes only. In other words,
-		the format is either bs=read_and_write or bs=read,write.
-		bs=4k,8k will thus use 4k blocks for reads, and 8k blocks
-		for writes. If you only wish to set the write size, you
+		the format is either bs=read_and_write or bs=read,write,trim.
+		bs=4k,8k will thus use 4k blocks for reads, 8k blocks for
+		writes, and 8k for trims. You can terminate the list with
+		a trailing comma. bs=4k,8k, would use the default value for
+		trims.. If you only wish to set the write size, you
 		can do so by passing an empty read size - bs=,8k will set
 		8k for writes and leave the read default value.
 
@@ -503,6 +505,11 @@ bs_unaligned	If this option is given, any byte size value within bsrange
 		may be used as a block range. This typically wont work with
 		direct IO, as that normally requires sector alignment.
 
+bs_is_seq_rand	If this option is set, fio will use the normal read,write
+		blocksize settings as sequential,random instead. Any random
+		read or write will use the WRITE blocksize settings, and any
+		sequential read or write will use the READ blocksize setting.
+
 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.
 
@@ -773,12 +780,10 @@ percentage_random=int	For a random workload, set how big a percentage should
 		is fully random. It can be set from anywhere from 0 to 100.
 		Setting it to 0 would make the workload fully sequential. Any
 		setting in between will result in a random mix of sequential
-		and random IO, at the given percentages.
+		and random IO, at the given percentages. It is possible to
+		set different values for reads, writes, and trim. To do so,
+		simply use a comma separated list. See blocksize.
 	
-percentage_sequential=int	See percentage_random. It is guaranteed that
-		they add up to 100. The later setting has priority, each
-		will adjust the other.
-
 norandommap	Normally fio will cover every block of the file when doing
 		random IO. If this option is given, fio will just get a
 		new random offset without looking at past io history. This