import ceph 16.2.6

[ceph.git] / ceph / doc / cephfs / administration.rst

diff --git a/ceph/doc/cephfs/administration.rst b/ceph/doc/cephfs/administration.rst
index c53161313c9bd322514ae2fd094775c468f836e0..fe55ff8ca3ba4007c57beaec6e47c4f0d75c6a1a 100644 (file)
--- a/ceph/doc/cephfs/administration.rst
+++ b/ceph/doc/cephfs/administration.rst
@@ -349,24 +349,6 @@ for use in exceptional circumstances.  Incorrect use of these
 commands may cause serious problems, such as an inaccessible
 file system.
 
-::
-
-    mds compat rm_compat
-
-Removes an compatibility feature flag.
-
-::
-
-    mds compat rm_incompat
-
-Removes an incompatibility feature flag.
-
-::
-
-    mds compat show
-
-Show MDS compatibility flags.
-
 ::
 
     mds rmfailed
@@ -379,3 +361,14 @@ This removes a rank from the failed set.
 
 This command resets the file system state to defaults, except for the name and
 pools. Non-zero ranks are saved in the stopped set.
+
+
+::
+
+    fs new <file system name> <metadata pool name> <data pool name> --fscid <fscid> --force
+
+This command creates a file system with a specific **fscid** (file system cluster ID).
+You may want to do this when an application expects the file system's ID to be
+stable after it has been recovered, e.g., after monitor databases are lost and
+rebuilt. Consequently, file system IDs don't always keep increasing with newer
+file systems.