Leaf States
Each leaf is in one of the following states:
State | Description |
|---|---|
| In this state, a leaf is not part of the cluster. This is the state before you run ADD LEAF to introduce the leaf into the system. A leaf that is unknown will not show up in SHOW LEAVES. The REMOVE LEAF command will transition a leaf into the |
| This is the default, healthy state of a leaf. In the |
| The master aggregator periodically sends a heartbeat (ping) to all the nodes in a cluster to determine if they are responsive and online. A leaf enters the If the cluster is in redundancy 2 any partitions on the See How Failover is Triggered in HA for failover cases. |
| Not online, and not available for read or write queries. A leaf in |
| In this state, the leaf is detached from the cluster. A leaf transitions from |
| A leaf transitions from The master aggregator will automatically run ATTACH LEAF to attach any partitions on the leaf back into the cluster. While the attach is running the leaf will stay in the |
The following diagram summarizes the leaf states and the transitions between them.
