Snapshot Management for GridGain 8 Clusters
The users of GridGain Ultimate edition can manage snapshots via the Snapshots tab of the Snapshots screen. This tab lets you create, restore, copy, move, delete, and perform integrity check of snapshots.
In addition to the snapshots created in Control Center, the list of snapshots contains the snapshots that were created by using programming APIs or the snapshot management tool. See Snapshots and Recovery or our video guide.
The Snapshots screen displays the following information about each snapshot:
| Column | Description |
|---|---|
Start Time |
Time when the snapshot create operation began |
Type |
Full or incremental |
ID |
The snapshot ID |
Mode |
The method that was used to create the snapshot, automatically on a schedule or manually |
Status |
The status of the snapshot operation that is being executed on the snapshot. The column shows the progress of the operation while the operation is in progress, and changes to OK when the operation is complete. |
Caches |
The number of caches included in the snapshot. Click the number to view the names of the caches. |
Creating Snapshots
To create a snapshot:
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Click Create snapshot.
The Create snapshot dialog opens.
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Select the snapshot type: Full (default) or Incremental.
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Optionally, to change the default snapshot compression (ZIP, level 1), select the compression type and, if prompted, the compression level.
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Optionally, to limit the snapshot writing speed to a specific number of Bytes per second, enter the required number of Bytes in the Write throttling field.
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Optionally, to change the default snapshot scope (all caches and cache groups):
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Select one of the alternative options:
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Include specific to include only explicitly specified caches and groups
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Exclude specific to include all caches and groups except for explicitly specified ones
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From the Caches and Cache groups drop-down lists, select the caches and groups to be included or excluded (depending on the option you have selected in (a) above).
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Click Create.
A snapshot is created in each node’s snapshot folder. Each node saves its part of the data. The snapshot folder is specified in the node configuration.
Restoring Snapshots
To restore a snapshot:
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Click on the
⋮icon in the table row that corresponds to the snapshot that you want to restore. -
From the menu that opens, select Restore from snapshot.
The Restore snapshot <name> dialog opens.
By default, you restore all caches and cache groups found in the snapshot.
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To exclude specific caches and cache groups:
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Select the Exclude specific option.
The dialog layout changes.
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From the Caches and/or Cache groups drop-down lists, select the required entities.
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Alternatively, to restore (include) only specific caches or cache groups:
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Select the Include specific option.
This excludes from the restoration process all caches and groups found in the snapshot.
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From the Caches and/or Cache groups drop-down lists, select the entities to restore.
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Optionally (if you are using the Exclude specific or Include specific option), select the Force check box to extend the include/exclude selection from caches to cache groups the caches belong to. For example, if you chose to exclude cache ABC that belongs to groups A and B, both these groups will be excluded.
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In the Comment field, type a comment regarding the restoration action.
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Click Restore.
Copying/Moving Snapshots
To move or copy a snapshot to a specific path, click the ⋮ icon and select Move or Copy.
Then, in the dialog box that appears, enter the destination path and click OK.
The destination path must be available on each node.
Verifying Snapshot Integrity
To verify that the snapshot data is not broken, run an integrity check.
To run the check, click the ⋮ icon and select Check.
The status column is updated with the results of the check.
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