Disk Capacity Expansion of an EVS Cluster

Context

As customer services evolve, disk space often becomes the initial bottleneck. In scenarios where other resources are ample, the conventional scale-out process is not only time-consuming but also resource-inefficient. Disk capacity expansion can quickly increase storage without service interruption. You can expand the disk capacity when no other services are running. If the disk space is insufficient after the expansion, you can continue to expand the disk capacity. If the expansion fails, you can expand the disk capacity again.

• Disk capacity expansion can be performed only for standard data warehouses using SSD and hybrid data warehouses. Only version 8.1.1.203 and later are supported.
• Disk capacity can be expanded only if the cluster is in Available, To be restarted, Read-only, or Node fault, Unbalanced state.

Precautions

• Hot storage disks cannot be scaled down.
• Scale up hot data storage during off-peak hours.
• If the cluster is in the read-only state, a message will be displayed after you click Expand Disk Capacity. After you start expansion, wait until it is completed and the cluster changes to the available state.

Procedure

1. Log in to the GaussDB(DWS) console.
2. Choose Clusters > Dedicated Clusters. All clusters are displayed by default.
3. In the Operation column of the target cluster, choose More > Change Specifications and click Change disk capacity. The Expand Disk Capacity page is displayed.
4. Set the capacity and click Resize Cluster Now.

   

   

   Hot Storage is changed to Hot Storage (with Cache) for DWS 3.0 clusters.

5. Confirm the settings and click Submit.
6. Return to the cluster list and check the disk capacity expansion progress.