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.

High-performance block gateway: Manages a Vhost client that provides access to high-performance block storage. See High-Performance Block Gateway.

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.

Prerequisites

• A high-performance storage cluster has been initialized. For instructions, see Initialize High-Performance Storage Cluster.
• A high-performance storage server with the block storage gateway role has been added and is connected with deployment completed. For instructions, see Add a High-Performance Storage Server.
• The selected server has no existing Vhost and has sufficient available CPU and hugepage memory resources for the selected performance mode. Only one Vhost can be created on a server.

Workflow

1. Select a server and client settings to create a gateway. For instructions, see Create a High-Performance Block Gateway.
2. After creation completes, check the client settings and mounted volume count in High-Performance Block Gateway Details.
3. Modify settings as needed. Unmount all volumes before deleting a gateway. For instructions, see Manage High-Performance Block Gateways.

Submit and Check the Result

Review the settings and submit the creation request. Creation runs as a background task. Returning to the list does not mean the task has completed.

Refresh the list to check resource state, or check the task result under Monitoring Management > Operation Log. After creation completes, click the resource name to view High-Performance Block Gateway Details. If creation fails, check the operation log details for the failure reason.

Basic Information

Vhost Client Configuration

Modify a High-Performance Block Gateway

1. Choose Modify for the gateway on its list or details page.
2. Modify the description, performance mode, storage network, or hugepage memory as needed. For parameter definitions and limits, see Create a High-Performance Block Gateway. The server cannot be changed.
3. Set the CPU Core allocation method:
   • Automatic Allocation: The system selects CPU cores for the performance mode.
   • Manual Selection: Select cores grouped by NUMA node and physical CPU. You can select available cores or cores already allocated to this Vhost. The count must match the 1, 2, 4, or 6 cores required by the performance mode. Only automatic allocation is available if CPU topology is unavailable.

   After changing the performance mode, review the selected cores to match the new mode.

4. Submit the changes. If a runtime configuration confirmation dialog appears, review the service impact before continuing.

Warning: Changing the performance mode, CPU cores, storage network, or hugepage memory restarts the Vhost client. Related volumes may reconnect and services may pause. Schedule the operation during a low-traffic period.

Check task completion under Monitoring Management > Operation Log, and then verify the applied configuration on the details page.

Delete a High-Performance Block Gateway

1. Verify that the mounted volume count is 0 and all Vhost volumes have been unmounted.
2. Choose Delete for the gateway on its list or details page.
3. Review the resource information and configuration cleanup notice, and confirm deletion.
4. Check the task result in the operation log. After successful deletion, refresh the list to verify that the resource has been removed. If deletion fails, check the operation log for the failure reason.

Warning: Deletion cleans up the block gateway configuration. Unmount all related volumes before proceeding.

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.