Ceph: Designing and Implementing Scalable Storage Systems

How to do it...

Let's see how a snapshot works with Ceph:

1. To test the snapshot functionality of Ceph, let's create a file on the block device that we created earlier:

         # echo "Hello Ceph This is snapshot test"            > /mnt/ceph-disk1/snapshot_test_file

2. Create a snapshot for the Ceph Block Device. Syntax for the same is as follows:

        # rbd snap create <pool name>/<image name>@<snap name>        # rbd snap create rbd/rbd1@snapshot1

3. To list the snapshots of an image, use the following syntax:

        # rbd snap ls <pool name>/<image name>        # rbd snap ls rbd/rbd1

4. To test the snapshot restore functionality of Ceph RBD, let's delete files from the filesystem: ...