doc/dev: add note about mon-managed and fs snaps

Signed-off-by: Milind Changire <mchangir@redhat.com>

diff --git a/doc/dev/cephfs-snapshots.rst b/doc/dev/cephfs-snapshots.rst
index 423240b9775cf8f2263ba6601c7f7a9a6b6a776c..c67771bb9076ed9c3e2b7c965b3d5c1b16684719 100644 (file)
--- a/doc/dev/cephfs-snapshots.rst
+++ b/doc/dev/cephfs-snapshots.rst
@@ -131,3 +131,8 @@ sharing a single pool (via namespaces), their snapshots *will* collide and
 deleting one will result in missing file data for others. (This may even be
 invisible, not throwing errors to the user.) If each FS gets its own
 pool things probably work, but this isn't tested and may not be true.
+
+.. Note:: To avoid snap id collision between mon-managed snapshots and file system
+   snapshots, pools with mon-managed snapshots are not allowed to be attached
+   to a file system. Also, mon-managed snapshots can't be created in pools
+   already attached to a file system either.