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Block Storage

Overview

Block Storage: The block storage function provides high-performance service for important business.

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.

Block Storage Volume

Create a General Block Storage Volume

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

Set the following parameters:
  • Name: Set the name for the block storage volume.

    Naming rules: 1-128 characters long. The name can only contain Chinese characters, letters (a-z, A-Z), digits, spaces, hyphens (-), underscores (_), periods (.), parentheses (), colons (:), and plus signs (+). You cannot start or end with spaces.

  • Quantity: Set the number of block storage volumes. You can create block storage volumes in bulk.
    Note: The field requires to be a digit ranging from 1 to 100.
  • Storage Pool: Select storage pools for block storage volumes.
    The platform automatically filters available storage pools that meet the three requirements below at the same time:
    1. The type of the storage pool is Block Storage.
    2. The role of the storage pool is Data Pool.
    3. The data redundancy type is Replicas.
  • Capacity: Set the capacity for the block storage volume (MB/GB/TB).
    Note:
    • The input must be greater than 1 MB and not exceed the maximum limit of 512TB.
    • We recommend you input a capacity no more than the actual available capacity of the selected storage pool.
Figure 1. Create a General Block Storage Volume


Manage a General Block Storage Volume

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.

Create a High-Performance Block Storage Volume

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

Set the following parameters:
  • Name: Set the name for the block storage volume.

    Naming rules: 1-128 characters long. The name can only contain Chinese characters, letters (a-z, A-Z), digits, spaces, hyphens (-), underscores (_), periods (.), parentheses (), colons (:), and plus signs (+). You cannot start or end with spaces.

  • Quantity: Set the number of block storage volumes. You can create block storage volumes in bulk.
    Note: The field requires to be a digit ranging from 1 to 100.
  • Storage Pool: Select high-performance storage pools for block storage volumes.
  • Capacity: Set the capacity for the block storage volume (MB/GB/TB).
    Note:
    • The input must be greater than 1 MB and not exceed the maximum limit of 512TB.
    • We recommend you input a capacity no more than the actual available capacity of the selected storage pool.
Figure 1. Create a High-Performance Block Storage Volume


Manage a High-Performance Block Storage Volume

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.

Snapshot Management

On the main menu of ZStack ZStone, choose Block Storage > Snapshot Management. Then, the Snapshot Management page is displayed.

The following actions help to manage snapshots.
Action Description
Clone Clone block storage volumes based on selected snapshots.
  • Two type of clone are supported: Linked Clone and Independent Clone.
  • Bulk clone is supported. For Linked Clone, you can clone up to 20 volumes at a time. For Independent Clone, you can clone a maximum of 6 volumes at a time.
  • Each snapshot supports Linked Clone with a maximum of 32 volumes cloned.
Delete Delete selected snapshots. After deletion, you cannot roll back the volume to the snapshot point. Proceed with caution.
Note: If a selected snapshot connects with cloned volumes, it cannot be deleted. Only when you flatten their connection or delete the cloned volumes can you delete the selected snapshot.
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