Using 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 snapshots and replication at a consistent point in time.
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 the Volume Group (BM) service in the Samsung Cloud Platform Console.

To create Block Storage, follow these steps.

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).

2. Click the Volume Group(BM) menu. 2. Volume Group(BM) List Navigate to the page.

3. Click the Volume Group(BM) Create button on the Volume Group(BM) page. 3. Navigate to the Create Volume Group (BM) page.

   Category	Required?	Detailed description
   Volume Group name	required	Volume Group name must start with an English letter and use English letters, numbers, and special characters (-) to input 3 to 28 characters cannot be modified after service creation
   Availability Zone	required	Select the Availability Zone to create resources within the region If you change the Availability Zone while a connected server has been added, the connected server will be reinitialized For users who have Private or Dedicated resources, the corresponding Availability Zone information can be viewed
   target volume	required	Add target volume to Volume Group Add button after clicking, 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 You can add up to 16 volumes that are created in the same Availability Zone

   Table. Volume Group (BM) Service Information Input Items

4. Click the Create button.

   • Once creation is complete, check the created resources on the Volume Group(BM) List page.

Check detailed information of Volume Group(BM)

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

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

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Volume Group(BM) List Go to the page.
3. On the Volume Group(BM) List page, click the resource to view detailed information. 3. Volume Group(BM) Details Go to the 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 available Deleting: Terminating service Editing: Changing settings Error Deleting: Abnormal state during deletion Error: Abnormal state during creation
     Clone creation	Create a replica in another location For details on creating a replica, 복제 생성하기 see 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 details on creating snapshots, see 스냅샷 생성하기
     Service cancellation	Cancel service button

     Table. Status information and additional functions

Detailed Information

Volume Group (BM) List page lets you view detailed information of the selected resource and, if needed, modify the information.

Snapshot List

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

Replication

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

Tag

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

Operation History

On the Volume Group(BM) Resource List page, you can view the operation history of the selected resource.

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 snapshot auto-creation interval. To modify the snapshot schedule, follow the steps below.

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Navigate to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to edit the snapshot schedule. 3. Volume Group (BM) Details Go to the page.
4. Click the Edit button of the Snapshot Schedule item. 4. Edit Snapshot Schedule The popup window opens.
5. Configure the automatic creation of snapshots and the creation interval, then click the Confirm button.
   • If you want to automatically generate snapshots based on the Generation Cycle, select Automatic Creation as Enabled.
   • Generation cycle is daily, hourly, or select weekly, day of week, hourly.

Modify Target Volume

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

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Volume Group (BM) List Navigate to the page.
3. Volume Group(BM) List page, click the resource to modify the target volume. 3. Volume Group(BM) Details page will be opened.
4. When adding a target volume, click the Add button of the Target Volume item. 4. Add Volume The popup window opens.
   • If you are 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.

Volume Group(BM) Using Snapshots

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

Create Snapshot

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

To create a snapshot, follow these steps.

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

Restore Snapshot

All target volumes of the Volume Group (BM) can be restored from snapshots. To restore from a snapshot, follow these steps.

1. Click the All Services > Storage > Block Storage (BM) menu. 1. Navigate to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Navigate to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to restore from a snapshot. 3. Volume Group(BM) Details Navigate to the page.
4. Click the volume name of the volume added to the target volume. 4. Block Storage(BM) Details Navigate to the page.
5. If a server has been added in the Connected Server item, connect to the server and then perform the disconnect operation (Umount, Disk Offline).
   • For more details, see Disconnect Server.
6. On the Volume Group(BM) Details page, click the Snapshot List page. 6. Volume Group(BM) Snapshot List Navigate to the page.
7. After checking the Snapshot name and Creation time, click the More button of the snapshot you want to restore.
8. Click the Restore button. 8. The snapshot recovery popup window opens.
9. After checking the Snapshot name and creation date and time, click the Confirm button. 9. Restore the target volumes from a snapshot.
10. Detailed Information Click the button. 10. Volume Group(BM) Details Navigate to the page.
11. Click the volume name of the volume added to the target volume. 11. Block Storage(BM) Details Navigate to the page.
12. If there are servers added in the Connection Server item, connect to the server and perform the connection tasks (Mount, Disk Online).
    • For more details, please refer to 서버 연결하기.

Create a backup

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

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Go to the Volume Group(BM) List page.
3. On the Volume Group(BM) List page, click the resource to create a recovery copy. 3. Go to the Volume Group(BM) Details page.
4. On the Volume Group(BM) Details page, click the Snapshot List page. 6. Volume Group(BM) Snapshot List Navigate to the page.
5. After verifying 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. 8. The snapshot recovery copy creation popup opens.
7. After entering Prefix, click the Generate button. 9. A popup window notifying the creation of a recovery copy opens.
   • The recovery copy’s name is generated as the entered Entered Prefix value + original Block Storage name.
8. Click the Confirm button. 10. The recovery copy creation request has been completed.

Delete Snapshot

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

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

Volume Group(BM) Using Replication

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

Create Clone

You can create a replicated Volume Group and volume in another location.

To create a copy, follow these steps.

1. All Services > Storage > Block Storage(BM) Click the menu. 1. Go to the Service Home page of Block Storage (BM).

2. On the Service Home page, click the Volume Group(BM) menu. 2. Volume Group (BM) List Navigate to the page.

3. Volume Group(BM) List On the page, click the resource to create a replica. 3. Volume Group(BM) Details Navigate to the page.

4. Create Clone Click the button. 4. Create Clone popup opens.

5. After entering the information for creating a clone, click the Create button. 5. Creates a replica Block Storage volume with the same Volume Group and disk type as the replica.

   Category	Required	Detailed description
   Replication Policy	required	Select replication policy Within region: Create replication in the same region’s Availability Zone Cross-region: Create replication in an Availability Zone of another region
   Clone location	required	Select the location to create the replication Region: Choose a location different from the original Block Storage(BM) volume Selection is required only when creating replication between regions Availability Zone: Select the Availability Zone for the replication
   Clone Volume Group name	required	Start with a letter and use letters, numbers, and special characters (-) to enter 3 to 28 characters.
   Replication Block Storage Name Prefix	required	Start with an English letter and use English letters, numbers, and special characters (-) to input 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 cycle	required	Select from 5 minutes, 1 hour, daily, weekly, monthly Daily: 23:59:00 every day Weekly: 23:59:00 every Sunday Monthly: 23:59:00 on the 1st of each month

   Table. Replication creation information items

6. On the Block Storage(BM) Details page, after clicking the Replication tab, check the replication information you created.

   • When selecting the volume name of the source or replica, you are taken to the volume’s Block Storage(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. All Services > Storage > Block Storage(BM) Click the menu. 1. Navigate to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Go to the Volume Group(BM) List page.
3. Click the resource to edit the replication policy on the Volume Group(BM) List page. 3. Go to the Volume Group(BM) Details page.
4. Click the Duplicate page. 4. Go to the Volume Group(BM) Replication page.
5. Click the Edit button of the Replication Policy. 5. Edit Replication Policy The popup window opens.
   • use: performs replication. * If Paused, it can be changed to Enabled.
   • Pause: Temporarily stops replication. * If used, it can be changed to pause.
   • Delete: Delete the replica. * If it is Paused, it can be changed to Delete, and after deletion, replication cannot be used again.
6. Check the modified Replication Policy on the Volume Group(BM) Replication page.

Edit replication cycle

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. 1. Navigate to the Service Home page of Block Storage (BM).
2. On the Service Home page, click the Volume Group(BM) menu. 2. Go to the Volume Group(BM) List page.
3. Volume Group(BM) List On the page, click the resource whose replication interval you want to modify. 3. Go to the Volume Group(BM) Details page.
4. Click the Duplicate page. 4. Go to the Volume Group(BM) Replication page.
5. Click the Edit button of Replication Cycle. 5. Edit Replication Cycle The popup window opens.
   • Replication interval: Choose from 5 minutes, 1 hour, daily, weekly, or monthly. * Replication is performed at the interval below.
     • Daily: every day 23:59:00
     • Weekly: Every Sunday 23:59:00
     • Monthly: the 1st of each month at 23:59:00
6. Check the modified replication interval on the Volume Group (BM) replication page.

Volume Group(BM) Cancel

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.