X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=d9f3095ee1c7a82a8753cf1f14b0280a24378d77;hp=f74360dee4becc4298bf7e7b8685a284550e552d;hb=31538d8744bba70f29623c547a2dbab3a1dcdd9a;hpb=12d02717a293cdd0c85504c958f7bf57411bb30b

diff --git a/HOWTO b/HOWTO
index f74360de..d9f3095e 100644
--- a/HOWTO
+++ b/HOWTO
@@ -81,7 +81,7 @@ $ fio job_file
 and it will start doing what the job_file tells it to do. You can give
 more than one job file on the command line, fio will serialize the running
 of those files. Internally that is the same as using the 'stonewall'
-parameter described the the parameter section.
+parameter described in the parameter section.
 
 If the job file contains only one job, you may as well just give the
 parameters on the command line. The command line parameters are identical
@@ -424,12 +424,20 @@ size=int	The total size of file io for this job. Fio will run until
 		Unless specific nrfiles and filesize options are given,
 		fio will divide this size between the available files
 		specified by the job. If not set, fio will use the full
-		size of the given files or devices. If the the files
-		do not exist, size must be given. It is also possible to
-		give size as a percentage between 1 and 100. If size=20%
-		is given, fio will use 20% of the full size of the given
+		size of the given files or devices. If the files do not
+		exist, size must be given. It is also possible to give
+		size as a percentage between 1 and 100. If size=20% is
+		given, fio will use 20% of the full size of the given
 		files or devices.
 
+io_limit=int	Normally fio operates within the region set by 'size', which
+		means that the 'size' option sets both the region and size of
+		IO to be performed. Sometimes that is not what you want. With
+		this option, it is possible to define just the amount of IO
+		that fio should do. For instance, if 'size' is set to 20G and
+		'io_limit' is set to 5G, fio will perform IO within the first
+		20G but exit when 5G have been done.
+
 filesize=int	Individual file sizes. May be a range, in which case fio
 		will select sizes for files at random within the given range
 		and limited to 'size' in total (if that is given). If not
@@ -1599,6 +1607,15 @@ _		Thread reaped, or
 X		Thread reaped, exited with an error.
 K		Thread reaped, exited due to signal.
 
+Fio will condense the thread string as not to take up more space on the
+command line as is needed. For instance, if you have 10 readers and 10
+writers running, the output would look like this:
+
+Jobs: 20 (f=20): [R(10),W(10)] [4.0% done] [2103MB/0KB/0KB /s] [538K/0/0 iops] [eta 57m:36s]
+
+Fio will still maintain the ordering, though. So the above means that jobs
+1..10 are readers, and 11..20 are writers.
+
 The other values are fairly self explanatory - number of threads
 currently running and doing io, rate of io since last check (read speed
 listed first, then write speed), and the estimated completion percentage