Persistent node (the PERSISTENT)
Persistent nodes, there has been the creation, until the initiative to remove the node.
2. Persistence order of nodes (PERSISTENT_SEQUENTIAL)
Lasting order of nodes, there has been the creation, until the initiative to remove the node. In ZK, each parent node maintains a timing for its first-level child node, recording the sequence of each child node created.
3. Temporary node (EPHEMERAL)
Temporary node is automatically cleared after a client session failover. The following temporary node can not create a child node.
4. Temporary order node (EPHEMERAL_SEQUENTIAL)
Temporary node is automatically cleared after a client session failover. The following temporary node can not create a child node. GetChildren parent node will get a list of the order.
Order node name must be unique.