Data cache plugin configuration documentation.

conf/master

@@ -127,9 +127,13 @@
 # the jobs system and is not generally recommended.
 #job_cache: True
 
-# Cache minion grains and pillar data in the cachedir.
+# Cache minion grains, pillar and mine data via the cache subsystem in the
+# cachedir or a database.
 #minion_data_cache: True
 
+# Cache subsystem module to use for minion data cache.
+#cache: localfs
+
 # Store all returns in the given returner.
 # Setting this option requires that any returner-specific configuration also
 # be set. See various returners in salt/returners for details on required

doc/ref/configuration/master.rst

@@ -459,14 +459,28 @@ jobs dir.
 Default: ``True``
 
 The minion data cache is a cache of information about the minions stored on the
-master, this information is primarily the pillar and grains data. The data is
-cached in the Master cachedir under the name of the minion and used to
-predetermine what minions are expected to reply from executions.
+master, this information is primarily the pillar, grains and mine data. The data
+is cached via the cache subsystem in the Master cachedir under the name of the
+minion or in a supported database. The data is used to predetermine what minions
+are expected to reply from executions.
 
 .. code-block:: yaml
 
     minion_data_cache: True
 
+.. conf_master:: cache
+
+``cache``
+---------------------
+
+Default: ``localfs``
+
+Cache subsystem module to use for minion data cache.
+
+.. code-block:: yaml
+
+    cache: consul
+
 .. conf_master:: ext_job_cache
 
 ``ext_job_cache``