Creating Snapshot

Both Standard and High-Performance Type NAS support snapshot creation. This document mainly introduces the operation of creating snapshots.

Overview

A snapshot can be created through the file system to save the file system data at a specified time. Snapshots are created incrementally. That is to say, only newly changed data compared with the previous snapshot will be created. Therefore, snapshot creation can be completed in a shorter time when data size change is not significant. Although the snapshot is created incrementally, deleting it does not prevent you from using any of the snapshot data, and unremoved snapshots restore the file system to that snapshot status.

Prerequisites

• You have successfully created a file system.

Note

• The file system must be in available status, and snapshots cannot be created temporarily in other status;
• The snapshot only retains the data written at the time of creation, and does not retain the data that has not been written to the hard disk in the memory at that time. It is strongly recommended that you shut down before creating a snapshot or ensure the data has been written and pause reading/writing.
• When the snapshot has not been created completely, you cannot create another snapshot of the file system.
• Creating snapshots may slightly degrade the performance of the file system. It is recommended that you avoid peak business hours when creating snapshots.
• Manually created snapshots will be permanently retained and deleted if no longer needed.

Directions

1. Log in to the CFS Console.
2. On the file system list page, click Create Snapshot on the right side of the target file system.
3. Enter the snapshot name, then click OK.