Merge branch 'master' into gfio

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 8a4e2bde1b7b8a1bd85d1a56dba41eb7d23e1d26..7170aa3d8fe626b3a8a76f55ea325f4cce1b67f5 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -602,6 +602,16 @@ 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)
+
+                       e4defrag IO engine that does regular EXT4_IOC_MOVE_EXT
+                                ioctls to simulate defragment activity in
+                                request to DDIR_WRITE event
+
                        external Prefix to specify loading an external
                                IO engine object file. Append the engine
                                filename, eg ioengine=external:/tmp/foo.o
@@ -1315,6 +1325,14 @@ that defines them is selected.
 [net] listen   For TCP network connections, tell fio to listen for incoming
                connections rather than initiating an outgoing connection. The
                hostname must be omitted if this option is used.
+[e4defrag] donorname=str
+               File will be used as a block donor(swap extents between files)
+[e4defrag] inplace=int
+               Configure donor file blocks allocation strategy         
+               0(default): Preallocate donor's file on init
+               1         : allocate space immidietly inside defragment event,
+                           and free right after event
+
 
 
 6.0 Interpreting the output