Disk Capacity Expansion of an EVS Cluster¶
Context¶
In conventional scaling, compute and storage resources are coupled. If a company scales out disks, it has to add unnecessary CPUs and memory at the same time. The scaling takes a long time and interrupts services. Disk capacity expansion can quickly increase storage without service interruption. You can increase disk space without having to stop services.
Note
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.
The disk capacity of each node can be expanded to up to 2000 GB.
A cluster can have up to 5000 disks. After scaling, the node storage capacity is evenly distributed based on the number of disks.
If the hot data storage capacity is increased and exceeds the quota in the discount package, excess capacity will be billed per use.
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¶
Log in to the GaussDB(DWS) management console.
Click Clusters. All clusters are displayed by default.
In the Operation column of the target cluster, choose More > Change Specifications and click Change disk capacity. The Change disk capacity page is displayed.
Set the capacity and click Resize Cluster Now.
Confirm the settings and click Submit.
Return to the cluster list and check the disk capacity expansion progress.
