23.10.2020

Server snapshot

The instructions describe the working principles with server snapshots, rules and restrictions.

What is a server snapshot?

Server snapshot — the server’s file system and network configuration state taken at a specific time point. Snapshot takes up minimal storage space.

The snapshot volume is formed as follows

  1. When a snapshot is created, it exactly matches the server’s file system state, which is why the snapshot size immediately after creation is 0 MB.
  2. After changing data on the server, performing file system i/o, and changing the network configuration, the current file system and the snapshot states are compared. The difference in states is the snapshot volume. The more changes occur in the file system, the larger the snapshot becomes.

Using a snapshot, you can restore the file system and network configuration state at a specific time point — return the files and directories contents, restore network settings.

Working with snapshots features and limitations

Taking a snapshot

To take a server snapshot, go to the Settings → Snapshot tab and click the Take snapshot button.

Screenshot №1. Take a snapshot

In the window that opens, provides a convenient name for the snapshot or use the default value, then click the Create button.

Screenshot №2. Enter name

This will create a server snapshot. Immediately after creating a snapshot, its size is 0 MB, because changes in the disk subsystem have not yet happened.

Screenshot №3. Server snapshot

Return to snapshot

To return to the server snapshot, go to the SettingsSnapshots tab, select the required snapshot and click the Restore button in the context menu. This will roll back the file system state to the selected snapshot.

Important: When restoring from a non-recent snapshot, newer ones are automatically deleted!

Screenshot №4. Recover Snapshot

Delete snapshot

To delete a server snapshot, go to the SettingsSnapshot’s tab, select the desired snapshot, and click in the context menu Remove.

Screenshot №5. Delete snapshot