doc: clarify WAL in bluestore-config-ref.rst

Signed-off-by: CodingSpiderFox <codingspiderfox@gmail.com>

diff --git a/doc/rados/configuration/bluestore-config-ref.rst b/doc/rados/configuration/bluestore-config-ref.rst
index 2cd6bf8be3d3d8844a02d132235dc0d3f9d8f212..027444616cd6fa6e8b9c347710c6bf420a2b13a0 100644 (file)
--- a/doc/rados/configuration/bluestore-config-ref.rst
+++ b/doc/rados/configuration/bluestore-config-ref.rst
@@ -20,7 +20,7 @@ and its private keyring.
 
 It is also possible to deploy BlueStore across two additional devices:
 
-* A *WAL device* (identified as ``block.wal`` in the data directory) can be
+* A *write-ahead log (WAL) device* (identified as ``block.wal`` in the data directory) can be
   used for BlueStore's internal journal or write-ahead log. It is only useful
   to use a WAL device if the device is faster than the primary device (e.g.,
   when it is on an SSD and the primary device is an HDD).