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Scaling a Cluster¶
When creating a cluster, you can determine the cluster capacity with several parameters:
The machine type based on storage/#CPU/memory size.
The number of machines.
ScyllaDB Cloud will deploy the cluster based on your specification. Later on, you can resize your cluster based on the needs of your application - you can monitor your workload’s utilization with ScyllaDB Monitoring tools and statistics.
Resize a Cluster¶
Choose Action> Resize Cluster in your cluster’s view to resize your cluster. You can:
Increase or decrease the number of nodes. The number of nodes you can add equals or is a multiple of the Replication Factor set for your cluster (the default is 3).
Modify the instance type to smaller or larger machines (cluster resize is not supported for t3.micro and e2.micro instances).
If you are increasing the number of nodes, the new node(s) will be added to the datacenter you are already using. To add nodes in a new datacenter, see Adding a Datacenter.
Note
Resizing might take a significant amount of time, between a few hours and a full day, depending on your cluster.
Adding a Datacenter¶
You can add a new datacenter (region) to an existing ScyllaDB cluster to scale out the cluster and provide higher availability (HA).
Choose Action> Add Data Center in your cluster’s view to open a request to add a new datacenter. You’ll need to specify the number of nodes you want to add in that datacenter. The number of nodes you can add equals or is a multiple of the Replication Factor set for your cluster (3, 4, or 5).The cluster status will be verified before provisioning to ensure stability and performance.
Note
The Add Data Center option is only available for private clusters.