The node state or status indicates the operational health or condition of a physical node in an Aster instance. In the AMCtab, each node in the node list has a color indicating its status. The possible node statuses are:
- When a node is first added to the Aster instance, or registered, it is considered to be a New node. At this point, the Aster instance is aware of the node’s existence, but the node has not yet contacted the queen in order to be prepared, or loaded with the Aster instance software. Nodes are also shown as New immediately following a restart of the Aster instance, before their state can be determined.
- After the node contacts the queen to be prepared, its status changes to Preparing. While in this status, it is loading the Aster instance software and preparing itself to become a participant in Aster Database.
- Once the node completes preparation, its status becomes Prepared. At this point, the node is ready to be incorporated into the Aster instance so that it can host virtual workers (vWorkers).
- The Aster software on the node is being upgraded.
- Active is the acceptable state for nodes in a running cluster. Active nodes are nodes that are available immediately to process queries in the Aster instance.
- The Passive state for nodes in a running cluster is not an expected state. If a node reflects a Passive state, contact your Teradata Customer Support Representative.
- Suspect nodes are nodes that have exhibited unusual behavior and are participating in the Aster instance in a limited capacity while being investigated for potential failures by the queen.
Failed nodes are nodes that are no longer participating in the Aster instance.