Document file_service_type option

It's now tested, so add it to the list of options in HOWTO.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/HOWTO b/HOWTO
index 745e9c72906a378fe1c5fb3818b3ab139834d633..06408e40e16a91fadeea2dce399efc444845b6e5 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -253,6 +253,14 @@ bs_unaligned       If this option is given, any byte size value within bsrange
 
 nrfiles=int    Number of files to use for this job. Defaults to 1.
 
+file_service_type=str  Defines how fio decides which file from a job to
+               service next. The following types are defined:
+
+                       random  Just choose a file at random.
+
+                       roundrobin  Round robin over open files. This
+                               is the default.
+
 ioengine=str   Defines how the job issues io to the file. The following
                types are defined: