doc/rbd: add note for the immutable-object-cache domain socket

Signed-off-by: Jason Dillaman <dillaman@redhat.com>

diff --git a/doc/rbd/rbd-persistent-cache.rst b/doc/rbd/rbd-persistent-cache.rst
index 0bd395942838d5592a52a7836eaeedc5c940368c..6c5bb92f601952f0e6bac0a1e3b73b6eb2bb4394 100644 (file)
--- a/doc/rbd/rbd-persistent-cache.rst
+++ b/doc/rbd/rbd-persistent-cache.rst
@@ -73,6 +73,10 @@ not enough capacity it will delete some cold cache files.
 
 Here are some important cache options correspond to the following settings:
 
+- ``immutable_object_cache_sock`` The path to the domain socket used for
+  communication between librbd clients and the ceph-immutable-object-cache
+  daemon.
+
 - ``immutable_object_cache_path`` The immutable object cache data directory.
 
 - ``immutable_object_cache_max_size`` The max size for immutable cache.