If the workloads on the data plane of a cluster change, you can scale out the cluster by increasing the number or capacity of its nodes. Services are not interrupted during cluster scale-out.
Prerequisites
- The target cluster is available and has no tasks in progress.
- The target cluster has sufficient quotas available.
Constraints
- The Node Specifications cannot be modified during scale-out. You can modify Node Specifications by referring to Changing Specifications.
- If you change the number and storage capacity of a specified type of node, nodes in other types will not be changed.
- The quota of nodes in different types varies. For details, see Table 1.
Table 1 Number of nodes in different typesNode Type
|
Number
|
|---|
ess
|
ess: 1-32
|
ess, ess-master
|
ess: 1-200
ess-master: an odd number ranging from 3 to 9
|
ess, ess-client
|
ess: 1-32
ess-client: 1-32
|
ess, ess-cold
|
ess: 1-32
ess-cold: 1-32
|
ess, ess-master, ess-client
|
ess: 1-200
ess-master: an odd number ranging from 3 to 9
ess-client: 1-32
|
ess, ess-master, ess-cold
|
ess: 1-200
ess-master: an odd number ranging from 3 to 9
ess-cold: 1-32
|
ess, ess-client, ess-cold
|
ess: 1-32
ess-client: 1-32
ess-cold: 1-32
|
ess, ess-master, ess-client, ess-cold
|
ess: 1-200
ess-master: an odd number ranging from 3 to 9
ess-client: 1-32
ess-cold: 1-32
|
Details about the four node types: - ess: the default node type that is mandatory for cluster creation. The other three node types are optional.
- ess-master: master node
- ess-client: client node
- ess-cold: cold data node
|
Procedure
- Log in to the CSS management console.
- In the navigation pane, choose a cluster type. The cluster management page is displayed.
- Choose More > Modify Configuration in the Operation column of the target cluster. The Modify Configuration page is displayed.
- On the Modify Configuration page, choose the Scale Cluster tab and click Scale out to set parameters.
- Action: Select Scale out.
- Resource: The changed amount of resources.
- Nodes: The number of nodes and node storage capacity of the default data node.
- Nodes: For details, see Table 1.
- The value range of Node Storage Type depends on the Node Specifications. The value must be a multiple of 20.
- Click Next.
- Confirm the information and click Submit.
- Click Back to Cluster List to switch to the Clusters page. The Task Status is Scaling out. When Cluster Status changes to Available, the cluster has been successfully scaled out.