Snapshots

Creating, restoring, and removing snapshots for GridGain 9 clusters from the Control Center Snapshots screen.

You can manage snapshots for GridGain 9 clusters via the Snapshots tab of the Snapshots screen. This tab lets you create, restore, and delete snapshots.

Snapshots Screen

Viewing Snapshots

By default, the Snapshots screen displays the following information about each snapshot:

Column	Description
Start Time	Time when the "snapshot create" operation began.
ID	The snapshot ID.
Parent ID	For incremental snapshots, the ID of the "parent" full snapshot.
Type	FULL or INCREMENTAL.
Status	The status of the snapshot operation: PREPARED, STARTED, COMPLETED, or FAILED.
Tables	The number of tables included in the snapshot. A hyperlink that displays the included tables' list.

In addition to the snapshots created in Control Center, the list contains those snapshots that were created using programming APIs or the snapshot management tool. See Snapshots and Recovery for details.

1. To add or remove columns to/from the list, select or deselect these columns in the list-level context menu.

2. To filter the snapshot list, define the filtering criteria in the Filters section on the right of the screen.

3. To view a list of tables included in a snapshot, click the hyperlinked value in the snapshot's Tables field.

   

   Create Snapshot
4. To show child (incremental) snapshots for a "parent" (full) snapshot, select Show related snapshots from the parent snapshot's context menu.

Creating Snapshots

To create a snapshot:

1. Click Create snapshot.

   The Create snapshot dialog opens.

   

   Create Snapshot
2. Select the snapshot type: Full (default) or Incremental.

3. Optionally, to change the default snapshot scope (all tables):

   1. Select one of the alternative options:

      • Include specific to include only explicitly specified tables

      • Exclude specific to include all tables except for explicitly specified ones

   2. From the Tables drop-down list, select the tables to be included or excluded (depending on the option you have selected in (a) above).

      

      Create Snapshot - scope
4. Optionally, in the Snapshot time field, enter a datetime in the past for the snapshot to reflect. Click the "calendar" icon and use controls in the dialog that pops up.

   

   Create Snapshot - datetime
5. Click Create.

A snapshot is created in each node's snapshot folder, which is specified in the cluster configuration.

Restoring Snapshots

To restore a snapshot:

1. From the context menu of the snapshot you want to restore, select Restore from snapshot.

   The Restore snapshot <ID> dialog opens.

   

   Restore Snapshot

   By default, you restore all tables found in the snapshot.

2. To exclude specific tables:

   1. Select the Exclude specific option.

      The dialog layout changes.

      

      Exclude specific tables
   2. From the Tables drop-down list, select the required tables.

3. Alternatively, to restore (include) only specific tables:

   1. Select the Include specific option.

      This excludes from the restoration process all tables found in the snapshot.

   2. From the Tables drop-down list, select the tables to restore.

4. Click Restore.

Removing Snapshots

To remove a snapshot:

1. From the context menu of the snapshot you want to remove, select Remove.

2. In the confirmation dialog that opens, click Remove.