Managing Snapshots

You can use Virtual Machine Snapshots to revert to a specific snapshot, as well as to manage the snapshots. To open Virtual Machine Snapshots, do one of the following:

• choose Manage Snapshots from the Virtual Machine menu
• click the Manage Snapshots button in the toolbar

  Note: To add this button to the toolbar, you should customize the toolbar. To learn how to do that, refer to the Customizing Toolbar section .

Using Virtual Machine Snapshots, you can:

• create new snapshots and delete the unused ones
• view the snapshot tree of a particular virtual machine
• select a snapshot to revert to

Note: You cannot create a snapshot manually or automatically or revert to a snapshot when your virtual machine is paused.

The Virtual Machine Snapshots window consists of the following areas:

• The snapshots tree pane.
• The snapshots management pane.

Snapshots Tree Pane

Snapshot icons appear as screen shots of the guest OS window if the virtual machine was running at the time you created a snapshot.

The left icon with a flag is the root of the snapshots tree - it is the initial state of the virtual machine used as the reference point. You cannot delete the root icon. The root icon is visible if at least one snapshot exists. If you want to delete a snapshot which is parental for some other snapshots, you can decide whether to delete only this snapshot or delete it with all the subsequent snapshots.

All snapshots in the snapshots tree are descendants of the root state of the virtual machine. The first snapshot contains "differences" with respect to the root state. The second successive snapshot contains differences with respect to the first snapshot. You may want to return to one of the previous snapshots and work with it. If you then create a new snapshot, a new snapshots branch will be created.

When the pointer is hovered over an item, you will see a tooltip message with a short description.

Snapshots Management Pane

The snapshots management pane includes the buttons necessary for managing the snapshots.

• The New button. Click this button to create a new snapshot for the present state of your virtual machine.
• The Go To button. Select the snapshot you want to go to in the snapshots tree and click this button to move from the present state of your virtual machine to the state saved in this snapshot.

  Note: Before you go to a specific snapshot, decide what you want to do with the current state of the virtual machine - by default, it will not be saved. To retain the changes made since the last snapshot, make a new snapshot.

• The Delete button. Select the snapshot you want to delete and click this button. If you delete an intermediate snapshot, the information it contains will be merged into the subsequent snapshot.

  Note : You cannot delete the root icon. It disappears only when you delete all snapshots in the tree.

You can also manage snapshots by right-clicking them in the tree:

• If you right-click the icon that shows the present state of the virtual machine, you can create a new snapshot for this state.
• If you right-click any other intermediate snapshot, you can choose to go to it, to delete it alone or with all the subsequent snapshots, or to edit its name and description.

Going to a Snapshot

1. Launch Parallels Management Console and select a virtual machine.
2. Open Virtual Machine Snapshots by doing one of the following:
   • choosing Manage Snapshots from the Virtual Machine menu
   • clicking the Manage Snapshots button in the toolbar
3. Select the snapshot you want to revert to and click Go To . If you revert to a snapshot from an unsaved state of the virtual machine, you will see the notification about that. Click Yes if you want to proceed without saving the state. Click No if you want to save the state and then go to the needed snapshot.

   Note: If, after the Parallels Server update, you decide to revert to one of the snapshots made before the update, you will see the message that a new Parallels Tools update is available. We recommend you to install them to work effectively with the virtual machine.

Deleting a Snapshot

1. Launch Parallels Management Console and select a virtual machine.
2. Open Virtual Machine Snapshots by doing one of the following:
   • choosing Manage Snapshots from the Virtual Machine menu
   • clicking the Manage Snapshots button in the toolbar
3. Select the snapshot you want to delete and click the Delete button if you want to delete only this snapshot. If you want to delete all the snapshots that come after it, right-click the snapshot and choose the Delete Snapshot with children option.

   If you delete an intermediate snapshot, the information it contains will be merged into the snapshot that follows it.

Note: You cannot delete the root icon, but it gets automatically deleted after you delete all the other snapshots.

Merging Snapshots

Merging is performed automatically when you delete any snapshot except the last one in the branch. When you delete an intermediate snapshot, the information it contains is merged into the next snapshot of the same branch.

If you delete the snapshot belonging to two branches, the information is merged into the next snapshot of each branch.

Note: If you delete the snapshot that comes after the root icon and that belongs to two branches, the branches will start from the initial state icon directly.

The snapshots are also merged automatically if you manage the capacity of your virtual hard disk with the help of Parallels Image Tool. Before applying any changes to the virtual hard disk, Parallels Image Tool merges and deletes all the snapshots except for the last one. Unlike merging the snapshots in Virtual Machine Snapshots, the results of merging process via Parallels Image Tool are not reflected in the snapshots tree, and the icons of already deleted snapshots are still present in the tree.