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Using Volume Group

Volume Group(BM) service allows you to create a group of up to 16 Block Storage(BM) volumes to create snapshots and replicas at a consistent point in time.
The user can enter the necessary information of the Volume Group (BM) through the Samsung Cloud Platform Console and select detailed options to create the corresponding service.

Creating Volume Group (BM)

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

To create Block Storage, follow the next procedure.

  1. All services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Volume Group(BM) menu should be clicked. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) page, click the Volume Group(BM) creation button. It moves to the Volume Group(BM) creation page.
    Classification
    Mandatory
    		Detailed Description
    Volume Group nameRequiredVolume Group name
    • Starts with English and uses English, numbers, and special characters (-) to input 3-28 characters
    • Cannot be modified after service creation
    Target VolumeRequiredAdd target volume to Volume Group
    • Add button is clicked, and then select the target volume in the target add popup
    • Target volume basis
      • Snapshot capacity: Setting
      • Snapshot automatic creation, creation cycle: Not used
      • Replication: Not used
      • Up to 16 can be added
    Table. Volume Group(BM) Service Information Input Items
  4. Complete button을 클릭하세요 -> 4. Complete button should be translated as: 4. Click the Complete button. So the final translation is: 4. Click the Complete button.
  • Once creation is complete, check the created resource from the Volume Group(BM) list page.
Reference
  • When adding the target volume, you can add the volume corresponding to the following to the Volume Group (BM).
  • Snapshot capacity: setting
  • Snapshot automatic creation, creation cycle: not used
  • Replication: Not used
  • The target volume can be added up to a maximum of 16.

Volume Group(BM) detailed information check

Volume Group(BM) service allows you to check and modify the entire resource list and detailed information. The Volume Group(BM) details page consists of detailed information, snapshot list, replication, job history tabs.

Volume Group(BM) service’s detailed information can be checked by following the next procedure.

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click on the resource to check the detailed information. It moves to the Volume Group(BM) details page.
  • Volume Group(BM) details page displays status information and additional feature information, and consists of details, snapshot list, replication, tags, job history tabs.
    ClassificationDetailed Description
    Volume Group statusVolume Group’s status
    • Creating: being created
    • Available: creation completed, server connection available
    • Deleting: service termination in progress
    • Editing: settings being changed
    • Error Deleting: abnormal state during deletion
    • Error: abnormal state during creation
    Replication creationCreate a replica in a different location
    Creating a snapshotCreate a snapshot at a specific point in time
    Service CancellationButton to cancel the service
    Table. Status Information and Additional Functions
Reference
For a recovery file, the snapshot list, replication tabs are not displayed.

Detailed Information

Volume Group(BM) list page where you can check the detailed information of the selected resource and modify the information if necessary.

ClassificationDetailed Description
ServiceService Name
Resource TypeResource Type
SRNUnique resource ID in Samsung Cloud Platform
  • In Volume Group(BM), it means Volume Group SRN
Resource NameResource Name
  • In Volume Group(BM), it means Volume Group name
Resource IDService’s unique resource ID
CreatorThe user who created the service
Creation TimeThe time when the service was created
EditorUser who modified the service
Revision TimeThe time when the service was revised
Volume Group nameVolume Group Name
DivisionDivision of original related to replication
Storage Volume Group nameStorage device internal Volume Group name
  • Distinguishing information of the Volume Group used for analysis when failures and issues occur
Snapshot ScheduleSnapshot automatic generation cycle
  • Snapshot capacity setting and schedule registration are possible
  • If snapshot schedule setting is required, click the modify button
BackupVolume Group’s backup name
  • Displayed when a backup exists
  • Clicking the name moves to the detailed page of the backup
Target VolumeVolume Group added Block Storage(BM)
  • Volume Name: Volume name
  • Disk Type: Disk type of the volume
  • Capacity: Capacity of the volume
  • Snapshot Capacity: Capacity of the snapshot storage space set for the volume
Table. Detailed information items of Volume Group(BM)

Snapshot list

Volume Group(BM) Resource List page where you can check the snapshot of the selected resource.

ClassificationDetailed Description
Snapshot NameSnapshot Name
Creation TimeSnapshot Creation Time
Additional Features > MoreSnapshot Management Button
  • Restore: Volume Restore with Snapshot
  • Create Copy: Create Copy from Snapshot
Table. Snapshot list tab detailed information items
Caution
  • When creating a snapshot in the Volume Group, a snapshot is created in the Block Storage (BM).
  • Volume Group snapshot is used when managing the target volume’s snapshot capacity and count.
  • If the maximum number of snapshot creations or the threshold of snapshot space (around 90%) is exceeded, old snapshots will be deleted from oldest.
  • If the snapshot capacity usage rate is high (around 90%), replication may be stopped.
  • Snapshots can be created up to a maximum of 1,023 (the maximum number of automatic creations through scheduling is 128), and if the maximum number of creations is exceeded, no more snapshots can be created.
  • Snapshot recovery must be performed in a state where all connected servers are disconnected (Umount, Disk Offline), and the recovered volume can be used after reconnection (Mount, Disk Online).
Reference
  • The snapshot creation time is based on Asia/Seoul (GMT +09:00) standard.
  • When using replication, the snapmirror file cannot be deleted.
  • When using Volume Group, set the snapshot schedule on the Volume Group (BM) detailed information screen. The created snapshot can be checked in the Block Storage (BM) snapshot list.

Replication

Volume Group(BM) Resource List page where you can check the replication information of the selected resource.

ClassificationDetailed Description
Replication PolicyReplication policy set by the user
Replication CycleThe replication cycle of the original set by the user
Replication StatusReplication progress status according to policy settings
Volume InformationVolume information of the original and replica
  • Classification: Classification of whether it is a replica-related original
  • Volume Group Name: Volume Group name of the original or replica
  • Location: Location where the volume was created
  • Authority: User authority of the volume set according to the replication policy
Table. Replication tab detailed information items
Caution
  • If the snapshot capacity usage rate is high (around 90%), replication may be stopped
Reference
  • When replicating, a replica with the same disk type is created.
  • Snapshot capacity setting and replica creation are possible after setting.
  • If you are using a Volume Group, check the replication information on the Volume Group(BM) resource list page.
  • The replica Block Storage can modify the connected server when the replication policy is paused or deleted.
  • The replica Block Storage can use the snapshot feature after the replication policy is deleted.
  • If the replication policy is paused or the replication status is completed, you can modify the policy and cycle from the replica.

Tag

Volume Group(BM) list page where you can check the tag information of the selected resource, and add, change or delete it.

ClassificationDetailed Description
Tag ListTag List
  • Check Key, Value information of the tag
  • Up to 50 tags can be added per resource
  • When entering a tag, search and select from the existing list of created Key and Value
Fig. Volume Group(BM) Tag Tab Items

Work History

Volume Group(BM) Resource List page where you can check the work history of the selected resource.

ClassificationDetailed Description
Job history listResource change history
  • Check job time, resource type, resource ID, resource name, job details, event topic, job result, and worker information
  • Click the detailed search button to search in detail
Table. Work History Tab Detailed Information Items

Volume Group(BM) Resource Management

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

Modifying the Snapshot Schedule

You can modify the snapshot automatic creation cycle. To modify the snapshot schedule, follow the following procedure.

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to modify the snapshot schedule. It moves to the Volume Group(BM) details page.
  4. Snapshot Schedule item’s Edit button should be clicked. Snapshot Schedule Edit popup window will be opened.
  5. Set the snapshot automatic creation and creation cycle, and click the confirm button.
  • Creation Cycle basis to automatically create a snapshot, in the case of Auto Creation select Yes.
  • Creation cycle can be selected as daily, hourly, or weekly, day of the week, hourly.
Caution

Volume Group snapshot is used when managing the target volume’s snapshot capacity and count

  • Snapshots can be created up to a maximum of 1,023 (the maximum number of automatic creations through scheduling is 128), and if the maximum number of creations is exceeded, no more snapshots can be created.
Reference
The snapshot schedule is based on Asia/Seoul (GMT +09:00) standard.

Modifying the target volume

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

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to modify the target volume. It moves to the Volume Group(BM) detail page.
  4. If you add a target volume, click the Add button in the Target Volume item. The Add Volume popup window opens.
  • If you want to disconnect the volume, click the Disconnect button in the Target Volume section.
  1. Select the volume you want to add and then click the Confirm button.
Caution
  • Volume Group’s replication policy is in use, the target volume cannot be modified.
Reference
  • When adding the target volume, you can add the following volume to the Volume Group (BM).
  • Snapshot capacity: settings
  • Snapshot automatic creation, creation cycle: not used
  • Copy: Not used
  • The target volume can be added up to a maximum of 16.

Volume Group(BM) snapshot usage

You can create, delete a snapshot of the created Volume Group(BM), or restore it using a snapshot. You can perform tasks on the Volume Group(BM) details page and the Snapshot list page.

Creating a snapshot

The user can create a snapshot of the desired point in time. To create a snapshot, follow the following procedure.

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click on the resource to create a snapshot. It moves to the Volume Group(BM) details page.
  4. Create Snapshot button is clicked. Create Snapshot popup window is opened.
  5. Confirm button, click. It creates a snapshot of the current point in time.
  6. Snapshot List page, click. It moves to the Volume Group(BM) Snapshot list page.
  7. Check the generated snapshot.
Caution
  • When creating a snapshot in the Volume Group, a snapshot is also created on the connected target volume.
  • Volume Group snapshot usage, manage the snapshot capacity and number of the target volume.
  • If the maximum number of snapshot creations or the threshold of snapshot space (around 90%) is exceeded, old snapshots will be deleted from oldest.
  • If the snapshot capacity usage rate is high (around 90%), replication may be stopped.
  • A snapshot can be created up to 1,023 (the automatic creation number through the schedule is up to 128), and if the maximum creation number is exceeded, no more snapshots can be created.
Reference
  • The snapshot creation time is based on Asia/Seoul (GMT +09:00) standard.
  • Snapshot storage space will be applied according to the settings on the Block Storage(BM) details page of the target volume.
  • If you want to automatically create snapshots through a schedule, set the snapshot schedule on the Volume Group(BM) details page.
  • For more information about the snapshot schedule, please refer to Modifying the Snapshot Schedule.
  • The replica can use the snapshot feature after the replication policy is deleted.

Restoring a snapshot

Volume Group(BM)’s target volumes can all be restored as snapshots. To restore as a snapshot, follow the following procedure.

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to be restored with a snapshot. It moves to the Volume Group(BM) detail page.
  4. Target Volume에 추가된 볼륨의 Volume Name을 클릭하세요. Block Storage(BM) Detail 페이지로 이동합니다. -> 4. Click the Volume Name of the volume added to the Target Volume. It moves to the Block Storage(BM) Detail page.
  5. connected server item has a server added, after server connection, perform disconnect work (Umount, Disk Offline) please.
  1. Volume Group(BM) details page, click the snapshot list page. It moves to the Volume Group(BM) snapshot list page.
  2. Snapshot name and Creation time should be confirmed, then click the More button of the snapshot you want to restore.
  3. Restore button, click. Snapshot restore popup window opens.
  4. Snapshot name and Creation time are confirmed after clicking the Confirm button. The target volumes are restored as snapshots.
  5. Detailed Information button will be clicked. It will move to the Volume Group(BM) Detail page.
  6. Target Volume에 추가된 볼륨의 Volume Name을 클릭하세요. Block Storage(BM) Detail 페이지로 이동합니다.
  7. connected server items have been added, after server connection, perform connection work (Mount, Disk Online)
Caution
  • Snapshot recovery must be performed with all target volumes disconnected (Umount, Disk Offline) from the connected server, and the recovered volume can be used after reconnection (Mount, Disk Online).
  • After the snapshot restoration is complete, all snapshots created after the snapshot used for restoration will be deleted.

Creating a recovery version

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

  1. All services > Storage > Block Storage(BM) menu is clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click on the resource to create a backup. It moves to the Volume Group(BM) details page.
  4. Volume Group(BM) details page, click the snapshot list page. It moves to the Volume Group(BM) snapshot list page.
  5. Snapshot name and Creation time are confirmed, then click the More button of the snapshot you want to create a restore from.
  6. Restore Point Creation button should be clicked. Snapshot restore point creation popup window will be opened.
  7. Prefix를 입력한 후, 확인 버튼을 클릭하세요. becomes 9. Enter the Prefix and then click the Confirm button. 복구본 생성을 알리는 팝업창이 열립니다. becomes A pop-up window announcing the creation of a backup will open. So the translation is: 9. Enter the Prefix and then click the Confirm button. A pop-up window announcing the creation of a backup will open.
  • The name of the backup is created with the input prefix value + original Block Storage name entered.
  1. Confirm button will be clicked. The application for creating a backup copy will be completed.
Caution
  • A backup copy can be created only one per original.
  • The recovery volume is a separate volume created with the same capacity as the original, and additional costs are incurred.

Deleting a snapshot

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

  1. All Services > Storage > Block Storage(BM) menu should be clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to delete the snapshot. It moves to the Volume Group(BM) details page.
  4. Snapshot list을 클릭하세요. Volume Group (BM) snapshot list 페이지로 이동합니다.
  5. Snapshot name and Creation time should be confirmed, then click the More button of the snapshot you want to delete.
  6. Delete button will be clicked. Snapshot list page will remove the snapshot.
Reference
When using replication, the snapmirror file cannot be deleted.

Volume Group(BM) replication usage

The created Volume Group(BM) can be synchronized periodically and consistently after creating replicas in other locations, and work can be done on the Volume Group(BM) details page and the replication page.

Create a copy

You can create a replica of the Volume Group and volume in a different location. To create a copy, follow the following procedure.

  1. All services > Storage > Block Storage(BM) menu is clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to create a replica. It moves to the Volume Group(BM) details page.
  4. Replicate Create button should be clicked. Replicate Create popup window will be opened.
  5. Replication Location and Replication Volume Group, Replication Block Storage Name Prefix, Replication Cycle should be entered and the Confirm button should be clicked. It creates a replica Volume Group and a replica Block Storage volume with the same disk type.
  • Replication location: Select a location different from the original Volume Group (BM).
  • Replica Volume Group name: It should start with English and use English, numbers, and special characters (-) to input 3-28 characters.
  • Replica Block Storage Name Prefix: It should start with English and use English, numbers, and special characters (-) to input 3-28 characters.
  • The replica Block Storage(BM) is created with a volume name of ‘replica Block Storage name prefix + original Block Storage volume name’.
  • Replication cycle: Choose from 5 minutes, 1 hour, daily, weekly, or monthly. Replication will be performed according to the cycle below.
  • Daily: every day 23:59:00
  • Every week: every Sunday 23:59:00
  • Every month: every month 1st 23:59:00
  1. Replication page will be clicked. It moves to the Replication page.
  2. Check the replication information.
  • When the original or replica Volume Group name is selected, it moves to the Volume Group(BM) details page.
Note
  • When creating a replica in the Volume Group, a replica Volume Group and Block Storage (BM) are created.
  • The replica Block Storage has the same type as the original and disk type.
  • You can create one replica per Volume Group, and additional data transfer fees apply when replicating across regions.

Modify replication policy

You can change the replication status through replication policy modification.

Caution
During replication, you cannot modify the replication cycle and replication policy.

To modify the replication policy, follow the following procedure.

  1. All services > Storage > Block Storage(BM) menu is clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to modify the replication policy. It moves to the Volume Group(BM) details page.
  4. Replication page will be clicked. It moves to the Volume Group(BM) Replication page.
  5. Replication Policy’s Edit button is clicked. Replication Policy Edit popup window is opened.
  • Usage: performs replication. Pause can be modified to Usage.
  • Temporary Suspension: temporarily suspends replication. If in use, it can be modified to temporary suspension.
  • Delete: It deletes the replication. In case of pause, it can be modified to delete, and after deletion, replication cannot be used again.
  1. Volume Group(BM) replication page where you can check the modified replication policy.
Caution
  • Note the following when deleting a policy.
  • After deleting the policy, the replica cannot be converted to the original and replication cannot be created.
  • After deleting the policy, you cannot connect to the existing replica, and you can only create a new replica.
  • Data stored only in replicas after temporary suspension will be deleted when replication is used again.
  • When using the replication policy, the replica is in a read-only state and data modification is not possible. Please use replication after unmounting all connected resources

Modify Replication Cycle

You can change the synchronization cycle between the original and the replica through replication cycle modification.

Caution
During replication, you cannot modify the replication cycle and replication policy.

To modify the replication cycle, follow the following procedure.

  1. All services > Storage > Block Storage(BM) menu is clicked. It moves to the Service Home page of Block Storage(BM).
  2. Service Home page, click the Volume Group(BM) menu. It moves to the Volume Group(BM) list page.
  3. Volume Group(BM) list page, click the resource to modify the replication cycle. It moves to the Volume Group(BM) details page.
  4. Replication page is clicked. It moves to the Volume Group(BM) replication page.
  5. Replication Cycle’s Edit button should be clicked. Replication Cycle Edit popup window will be opened.
  • Replication cycle: Choose from 5 minutes, 1 hour, daily, weekly, or monthly. Replication will be performed according to the cycle below.
  • Daily: every day 23:59:00
  • Every week: every Sunday 23:59:00
  • Every month: every month 1st 23:59:00
  1. Volume Group(BM) replication page where you can check the modified replication cycle.

Volume Group(BM) cancellation

You can cancel the unused Volume Group(BM).
Volume Group(BM) has no separate cancellation procedure, and it is automatically deleted when all volumes are disconnected from the target volume item.

Caution
After cancellation, it cannot be recovered, so please be careful.
Using Replication
Release Note