Managing CephFS snapshots
As a storage administrator, you can cretate Ceph File System (CephFS) volume and subvolume snapshots on the IBM Storage Ceph dashboard.
The Ceph File System (CephFS) snapshots create an immutable, point-in-time view of a Ceph File System. CephFS snapshots are asynchronous and are kept in a special hidden directory in the CephFS directory named .snap. You can specify snapshot creation for any directory within a Ceph File System. When specifying a directory, the snapshot also includes all the subdirectories beneath it.
CephFS snapshot feature is enabled by default on new Ceph File Systems, but it must be manually enabled on existing Ceph File Systems.
Warning: Each Ceph Metadata Server (MDS) cluster allocates the snap identifiers
independently. Using snapshots for multiple Ceph File Systems that are sharing a single pool causes
snapshot collisions, and results in missing file data.