Failure to Add, Remove, or Replace a Node

Failure to Add, Remove, or Replace a Node

ScyllaDB relies on the Raft consensus algorithm, which requires at least a quorum of nodes in a cluster to be available. If some nodes are down and the quorum is lost, adding, removing, and replacing a node fails.

See :doc:Handling Node Failures <handling-node-failures> for information about recovery actions depending on the number of nodes and DCs in your cluster.