Use Volume Group

The Volume Group(BM) service allows you to configure up to 16 Block Storage(BM) volumes as a group, enabling the creation of consistent point-in-time snapshots and replications.
Users can create the service by entering the required information for the Volume Group (BM) and selecting detailed options through the Samsung Cloud Platform Console.

Create Volume Group (BM)

You can create and use a Volume Group (BM) service in the Samsung Cloud Platform Console.

To create a Block Storage, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Navigate to the Service Home page of Block Storage(BM).
2. Click the Volume Group(BM) menu. Navigate to the Volume Group(BM) List page.
3. On the Volume Group(BM) page, click the Volume Group(BM) Create button. You will be taken to the Volume Group(BM) Create page.

   Category	Required	Detailed description
   Volume Group name	Required	Volume Group name must start with an English letter and be 3 to 28 characters using English letters, numbers, and special characters (-) cannot be modified after service creation
   target volume	Required	Add target volume to Volume Group After clicking the Add button, select the target volume in the add target popup Target volume criteria Snapshot size: Set Snapshot auto-creation, creation interval: Not used Replication: Not used Up to 16 can be added

   Table. Volume Group (BM) Service Information Input Items
4. Click the Create button.
   • When creation is complete, check the created resources on the Volume Group(BM) List page.

Check detailed information of Volume Group (BM)

Volume Group(BM) service allows you to view and edit the full resource list and detailed information. Volume Group(BM) Details page consists of Details, Snapshot List, Replication, Operation History tabs.

To view detailed information about the Volume Group(BM) service, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to view detailed information. It navigates to the Volume Group(BM) Detail page.
   • Volume Group(BM) Details page displays status information and additional feature information, and consists of Details, Snapshot List, Replication, Tags, Operation History tabs.

     Category	Detailed description
     Volume Group status	Volume Group status Creating: In progress Available: Creation complete, server connection possible Deleting: Service termination in progress Editing: Changing settings Error Deleting: Abnormal state during deletion Error: Abnormal state during creation
     Clone creation	Create a replica at another location For details on creating a replica, see Create a replica Replication is not possible if the snapshot size is not set or a replication policy already exists
     Create snapshot	Create a snapshot at a specific point in time For detailed information on snapshot creation, see Creating a Snapshot
     Service termination	Cancel service button

     Table. Status information and additional features

Detailed information

Volume Group(BM) List page allows you to view detailed information of the selected resource and edit the information if needed.

Snapshot list

Volume Group(BM) resource list page allows you to view the snapshot of the selected resource.

Clone

Volume Group(BM) Resource List page allows you to view the replication information of the selected resource.

Tag

Volume Group(BM) List page lets you view the tag information of the selected resource, and you can add, modify, or delete it.

Work History

Volume Group(BM) Resource List You can view the operation history of the selected resource on this page.

Volume Group(BM) Managing Resources

If you need to modify the settings of a created Volume Group (BM) or add or remove target volumes, you can perform the operation on the Volume Group(BM) Details page.

Edit Snapshot Schedule

You can modify the automatic snapshot creation interval. To modify the snapshot schedule, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. Navigate to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to modify the snapshot schedule. You will be taken to the Volume Group(BM) Details page.
4. Click the Edit button for the Snapshot Schedule item. The Snapshot Schedule Edit popup opens.
5. Set the snapshot auto creation status and creation interval, then click the Confirm button.
   • If you want to automatically create snapshots based on the Creation Cycle, select Automatic Creation as Enabled.
   • Generation cycle can be selected daily, hourly, or weekly, day of week, hourly. Please select.

Edit target volume

You can add or detach the target volume. To modify the target volume, follow the steps below.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to edit the target volume. You will be taken to the Volume Group(BM) Details page.
4. If you are adding a target volume, click the Add button of the Target Volume item. The Add Volume popup window opens.
   • When disconnecting a volume, click the Disconnect button in the Target Volume item.
5. After selecting the volume you want to add, click the Confirm button.

Using Volume Group (BM) Snapshots

You can create, delete, or recover using snapshots for the created Volume Group (BM). You can perform these actions on the Volume Group (BM) Details page and the Snapshot List page.

Creating a Snapshot

Users can create a snapshot at the desired point in time.

To create a snapshot, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Navigate to the Service Home page of Block Storage(BM).
2. From the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to create a snapshot. You will be taken to the Volume Group(BM) Details page.
4. Click the Create Snapshot button. The Create Snapshot popup window opens.
5. Click the Confirm button. Generates a snapshot of the current point in time.
6. Click the Snapshot List page. Navigate to the Volume Group(BM) Snapshot list page.
7. Check the generated snapshot.

Recover Snapshot

You can restore all target volumes of the Volume Group(BM) from a snapshot. To restore from a snapshot, follow the steps below.

1. Click the All Services > Storage > Block Storage(BM) menu. Navigate to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. Navigate to the Volume Group(BM) List page.
3. Volume Group(BM) List On the page, click the resource to restore from a snapshot. Volume Group(BM) Details You will be taken to the page.
4. Click the volume name of the volume added to the Target volume to go to the Block Storage(BM) Details page.
5. If a server has been added in the Connected Server item, connect to the server and then perform the disconnect operations (Umount, Disk Offline).
   • For more details, see Disconnect Server.
6. On the Volume Group(BM) Details page, click the Snapshot List page. You will be taken to the Volume Group(BM) Snapshot List page.
7. After checking the Snapshot name and Creation time, click the More button of the snapshot you want to restore.
8. Click the Recover button. The snapshot recovery popup will open.
9. After verifying the Snapshot name and Creation time, click the Confirm button. The target volumes will be restored from the snapshot.
10. Click the Detailed Information button. It navigates to the Volume Group(BM) Detailed page.
11. Click the volume name of the volume added to the Target volume. It will navigate to the Block Storage (BM) Details page.
12. If there is a server added in the Connection Server item, after connecting to the server, perform the connection tasks (Mount, Disk Online).
    • For detailed information, refer to Connect to Server.

Create a backup

You can create a recovery copy from a snapshot of the target volume. To create a snapshot recovery copy, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource for which you want to create a recovery copy. You will be taken to the Volume Group(BM) Details page.
4. From the Volume Group(BM) Details page, click the Snapshot List page. You will be taken to the Volume Group(BM) Snapshot List page.
5. After checking the snapshot name and creation timestamp, click the More button of the snapshot for which you want to create a recovery copy.
6. Click the Create Recovery button. The snapshot recovery creation popup opens.
7. After entering Prefix, click the Confirm button. A popup indicating that a backup is being created will open.
   • The recovery copy’s name is created as the entered Prefix value + original Block Storage name.
8. Click the Create button. The backup creation request has been completed.

Delete snapshot

You can select a snapshot to delete. To delete a snapshot, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to delete the snapshot. You will be taken to the Volume Group(BM) Details page.
4. Click Snapshot List. Navigate to the Volume Group (BM) Snapshot List page.
5. After confirming the Snapshot name and creation time, click the More button of the snapshot you want to delete.
6. Click the Delete button. The snapshot will be removed from the Snapshot List page.

Using replication for Volume Group (BM)

The created Volume Group (BM) can be synchronized at regular, consistent points after creating a replica at another location. You can perform tasks on the Volume Group(BM) Details page and the Replication page.

Create a Clone

You can create a replicated Volume Group and volume at a different location.

To create a copy, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource for which you want to create a replica. You will be taken to the Volume Group(BM) Details page.
4. Click the Create Clone button. The Create Clone popup opens.
5. Enter Replication Location, Replication Volume Group, Replication Block Storage Name Prefix, and Replication Interval, then click the Create button. It creates a replica Block Storage volume with the same Volume Group and disk type as the source.
   • Replication Location: Select a location different from the original Volume Group (BM).
   • Clone Volume Group name: Start with an English letter and use English letters, numbers, and special characters (-) to enter 3~28 characters.
   • Replication Block Storage Name Prefix: Start with an English letter and use English letters, numbers, and special characters (-) to enter 3 to 28 characters.
     • A replica Block Storage (BM) is created with a volume name of ‘Replica Block Storage name Prefix + original Block Storage volume name’.
   • Replication interval: Select from 5 minutes, 1 hour, daily, weekly, or monthly. Replication will be performed at the selected interval.
     • Daily: daily 23:59:00
     • Weekly: Every Sunday 23:59:00
     • Monthly: 1st of each month 23:59:00
6. Click the Clone page. You will be taken to the Clone page.
7. Check the replication information.
   • When selecting the Volume Group name of the original or replica, you will be taken to the Volume Group(BM) Details page.

Edit replication policy

You can change the replication status by modifying the replication policy.

To modify the replication policy, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Go to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource you want to modify the replication policy for. You will be taken to the Volume Group(BM) Details page.
4. Click the Clone page. Navigate to the Volume Group(BM) Clone page.
5. Click the Edit button of the Replication Policy. The Edit Replication Policy popup opens.
   • Enabled: performs replication. If Paused, you can modify it to Enabled.
   • Pause: Temporarily stops replication. If Use, it can be changed to Pause.
   • Delete: Delete the replica. Paused can be changed to Delete, and after deletion you cannot use replication again.
6. Check the modified Replication Policy on the Volume Group(BM) Replication page.

Edit replication interval

You can change the synchronization interval between the original and the replica by modifying the replication interval.

To modify the replication interval, follow these steps.

1. Click the All Services > Storage > Block Storage(BM) menu. Navigate to the Service Home page of Block Storage(BM).
2. On the Service Home page, click the Volume Group(BM) menu. You will be taken to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource whose replication schedule you want to modify. You will be taken to the Volume Group(BM) Details page.
4. Click the Clone page. Navigate to the Volume Group (BM) Clone page.
5. Click the Edit button of Replication Cycle. The Edit Replication Cycle popup opens.
   • Replication interval: Select from 5 minutes, 1 hour, daily, weekly, or monthly. Replication will be performed at the selected interval.
     • Daily: 23:59:00
     • Weekly: Every Sunday 23:59:00
     • Monthly: 1st day of each month 23:59:00
6. Check the modified replication interval on the Volume Group(BM) Replication page.

Cancel Volume Group (BM)

You can delete an unused Volume Group (BM).
Volume Group(BM) has no separate termination procedure, and it is automatically deleted when you disconnect all volumes in the target volume item.