Expanding a Data Disk of an MRS Cluster Node

As your business grows, more data disk capacity is needed.

To expand the data disks for clusters of MRS 3.1.0 (with patch 3.1.0.0.11 or later installed), MRS 3.1.5 (with patch 3.1.5.0.3 or later installed), MRS 3.3.0-LTS, or later, see One-Click Data Disk Expansion.

To expand the data disks for clusters of MRS 3.1.2-LTS.3 or MRS 3.2.0-LTS.1, see Manual Data Disk Expansion.

Notes and Constraints

The data disk capacity of a node can be expanded but cannot be reduced.
The maximum capacity of a node data disk is 32 TB.
The local disks cannot be expanded.
Only the EVS disks, disk partitions, and file systems mounted to the cluster nodes by default during creation can be expanded.
The cloud server to which an EVS disk is mounted must be in the running state. The EVS disk must be in in-use or available state.

One-Click Data Disk Expansion

The following describes how to expand the data disk capacity for clusters of MRS 3.1.0 (with patch 3.1.0.0.11 or later installed), MRS 3.1.5 (with patch 3.1.5.0.3 or later installed), MRS 3.3.0-LTS, or later.

Log in to the MRS console.
In the navigation pane on the left, choose Active Clusters and click the target cluster name.
On the MRS details page, click Nodes.
In the Operation column of the node group whose disk capacity needs to be expanded, click More and then Expand Data Disk Capacity.

After disks in the node group are expanded, all data disks on the selected nodes will be expanded to the target capacity.
Select the nodes to be expanded, set the target capacity, and click OK.
If there are a large number of nodes, you can fuzzy search for nodes by name or IP address, or filter nodes by data disk capacity.
- The estimated price is based on the disk capacity displayed and may be inaccurate. You will be billed based on the actual disk capacity of the node. Synchronize the disk information before expanding for more accurate estimated price.
- If the data disk of a node group has been expanded, same expansion will be performed for subsequent scale-out of the node group or cluster cloning.
- When multiple nodes are selected for scale-out, some disks mounted to the nodes may have higher capacity than the target volume. In this case, the disks will not be expanded or billed.
- Only the data disks mounted to a node by default during cluster creation can be expanded. For data disks mounted by yourself, only the EVS disks can be expanded. For details, see Extending Partitions and File Systems for Data Disks (Linux) or contact Huawei Cloud technical support.
- When a disk partition or file system is being expanded, the additional capacity can be expanded only to the tail partition of the disk. A system disk has multiple partitions and cannot be expanded.
Check whether the data disk is expanded.
1. In the disk column, check whether the data disk is expanded to the target volume.
2. Log in to FusionInsight Manager, view the disk information of the expanded node, and check whether the corresponding disk partition is expanded.

Manual Data Disk Expansion

The following describes how to expand the data disk capacity for clusters of MRS 3.1.2-LTS.3 and MRS 3.2.0-LTS.1.

Contact Huawei Cloud technical support to enable the data disk expansion function.
Expand an EVS disk by referring to One-Click Data Disk Expansion.
Only EVS disks can be expanded to the target volume. Disk partitions and file systems cannot be expanded automatically.
Expand a disk partition and file system.
Download the data disk expansion patches by referring to Patch Download Addresses. Expand a disk partition and file system by referring to the README.md file in the patch description.

For a key-pair cluster (that is, a cluster in which only key pairs can be used to log in to cluster nodes), data disks cannot be manually expanded.
If there is a data disk mounted by a user and the disk partition and file system cannot be expanded, handle the problem by referring to Extending Partitions and File Systems for Data Disks (Linux) or contact Huawei Cloud technical support.