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 745e9c7..06408e4 100644
--- a/HOWTO
+++ b/HOWTO
@@ -253,6 +253,14 @@
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: