Modifies an Xpand deployment, adding and removing Xpand Nodes, adding and removing zones, resizing devices, configuring the number of replicas Xpand maintains of slices.
When using the Xpand Storage Engine topology, the details described here only apply when you connect to the Xpand nodes.
This statement allows you to modify the Xpand deployment, such as adding and removing nodes, resizing devices, and grouping nodes into zones.
ALTER CLUSTER supports the following statements:
Performs a group change to add Xpand Nodes to a deployment
Performs a group change to remove Xpand Nodes from a deployment, without rebalancing to protect data.
Performs a group change to reform the deployment.
Performs a group change to resize
Marks the given Xpand Nodes for softfail, causing the Rebalancer to move data of the node so that it can safely be removed.
Cancels a running softfail operation, restoring the Xpand Node to its previous configuration.
Groups Xpand Nodes into arbitrary zones to improve fault tolerance.