Add missing IO engines to the HOWTO

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

diff --git a/HOWTO b/HOWTO
index 1c4b308cf3df9bd33d75306cb3e0e2dfd8df4a40..87346ae5acee4cdf62497adbbc556a9f88289c8c 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -670,15 +670,29 @@ ioengine=str      Defines how the job issues io to the file. The following
                                channel semantics (Send/Recv) for the
                                InfiniBand, RoCE and iWARP protocols.
 
-                       falloc   IO engine that does regular fallocate to
-                                simulate data transfer as fio ioengine.
-                                DDIR_READ  does fallocate(,mode = keep_size,)
-                                DDIR_WRITE does fallocate(,mode = 0)
-                                DDIR_TRIM  does fallocate(,mode = punch_hole)
+                       falloc  IO engine that does regular fallocate to
+                               simulate data transfer as fio ioengine.
+                               DDIR_READ  does fallocate(,mode = keep_size,)
+                               DDIR_WRITE does fallocate(,mode = 0)
+                               DDIR_TRIM  does fallocate(,mode = punch_hole)
 
                        e4defrag IO engine that does regular EXT4_IOC_MOVE_EXT
-                                ioctls to simulate defragment activity in
-                                request to DDIR_WRITE event
+                               ioctls to simulate defragment activity in
+                               request to DDIR_WRITE event
+
+                       rbd     IO engine supporting direct access to Ceph
+                               Rados Block Devices (RBD) via librbd without
+                               the need to use the kernel rbd driver. This
+                               ioengine defines engine specific options.
+
+                       gfapi   Using Glusterfs libgfapi sync interface to
+                               direct access to Glusterfs volumes without
+                               options.
+
+                       gfapi_async Using Glusterfs libgfapi async interface
+                               to direct access to Glusterfs volumes without
+                               having to go through FUSE. This ioengine
+                               defines engine specific options.
 
                        external Prefix to specify loading an external
                                IO engine object file. Append the engine