Related Definitions

Block Storage Volume: A block storage volume displays the block storage device provided in a storage pool. The data of a block storage volume is distributed in multiple data disks of multiple servers based on specified replicas and has advanced characteristics such as thin provisioning and scalability.

Snapshot: A snapshot is a point-in-time capture of data status in a block storage volume and provides data backup and recovery features for the storage system.

Manage a Local Block Storage Volume

On the main menu of ZStack ZStone, choose Block Storage > Block Storage Volume > General Block Storage Volume. On the General Block Storage Volume page, click Local. Then, the Local page is displayed.

The following actions help to manage block storage volumes.

Action	Description
Create Block Storage Volume	Create block storage volumes. You can create up to 100 volumes at a time.
Set Business QoS	If you enable this parameter, you can set the upper limit of the I/O requests that can be processed per second and the read/write bandwidth for the block storage volume. Maximum IOPS: 0 or 100 to 2000000, integer. Entering 0 indicates no limit on the maximum IOPS. Maximum Bandwidth: 0 or 2MB/s to 100GB/s, integer. Entering 0 indicates no limit on the maximum bandwidth.
Flatten	Disconnect the volume with its source, creating an independent volume. Bulk action is supported. We recommend selecting fewer than 4 volumes every time to minimize the impact on I/O of the storage pool.
Expand Capacity	Increases volume capacity. The new capacity must be greater than the current capacity. The expansion capacity must be greater than or equal to the minimum limit of 4 MB. The expanded capacity must be no greater than 512 TB.
Migrate	Migrate volumes to other storage pools. You can migrate up to 6 volumes at a time. The system auto-deletes the source volume after it is successfully migrated. Migrating a volume might affect your business I/O. We recommend that you avoid peak business hours to perform this action.
Create Snapshot	Create snapshots for block storage volumes. You can create snapshots for up to 32 volumes at a time. Remember to save the temporary state before critical actions so as to achieve rapid rollback in case of failures. A maximum of 256 snapshots in every volume. A maximum of 10,240 snapshots in every cluster.
Roll Back	Restore volume data to the selected snapshot point. All data from the snapshot point to the current time point will be overwritten. Note that the action is irreversible. Proceed with caution. We recommend you all read and write operations on target volumes and their snapshots when rolling back a volume to ensure data consistency. Only volumes in healthy or failed rollback states support rollback.
Deep Clone	Create full copies including all snapshots and QoS configurations of source volumes. You can clone up to 6 volumes at a time.
Delete	Remove local block storage volumes. You can delete a maximum of 20 volumes at a time. Note: Deleting a bock storage volume detaches all data from the volume. After deletion, the volume data cannot be recovered. Proceed with caution. If a block storage volume has snapshots , it cannot be deleted.

Manage a Third-Party Block Storage Volume

On the main menu of ZStack ZStone, choose Block Storage > Block Storage Volume > General Block Storage Volume. On the General Block Storage Volume page, click Third Party. Then, the Third Party page is displayed.

The following actions help to manage third-party block storage volumes.

Action	Description
Update	You can manually update the list of third-party block storage volumes and view their details.
Set Business QoS	If you enable this parameter, you can set the upper limit of the I/O requests that can be processed per second and the read/write bandwidth for the block storage volume. Maximum IOPS: 0 or 100 to 2000000, integer. Entering 0 indicates no limit on the maximum IOPS. Maximum Bandwidth: 0 or 2MB/s to 100GB/s, integer. Entering 0 indicates no limit on the maximum bandwidth. Note: QoS cannot be configured for those volumes already attached to access paths.
Create Snapshot	Create snapshots for block storage volumes. You can create snapshots for up to 32 volumes at a time. Remember to save the temporary state before critical actions so as to achieve rapid rollback in case of failures. A maximum of 256 snapshots in every volume. A maximum of 10,240 snapshots in every cluster.
Deep Clone	Create full copies including all snapshots and QoS configurations of source volumes. You can clone up to 6 volumes at a time.
Delete	Remove the updated block storage volumes. You can delete a maximum of 20 volumes at a time. Note: Deleting a bock storage volume detaches all data from the volume. After deletion, the volume data cannot be recovered. Proceed with caution.

Manage a Local Block Storage Volume

On the main menu of ZStack ZStone, choose Block Storage > Block Storage Volume > High-Performance Block Storage Volume. On the High-Performance Block Storage Volume page, click Local. Then, the Local page is displayed.

The following actions help to manage block storage volumes.

Action	Description
Create Block Storage Volume	Create block storage volumes. You can create up to 100 volumes at a time.
Delete	Remove local block storage volumes. You can delete a maximum of 20 volumes at a time. Note: Deleting a bock storage volume detaches all data from the volume. After deletion, the volume data cannot be recovered. Proceed with caution.