The ZooKeeper operations

ZooKeeper's data model and its API support the following nine basic operations:

Operation	Description
create	Creates a znode in a specified path of the ZooKeeper namespace
delete	Deletes a znode from a specified path of the ZooKeeper namespace
exists	Checks if a znode exists in the path
getChildren	Gets a list of children of a znode
getData	Gets the data associated with a znode
setData	Sets/writes data into the data field of a znode
getACL	Gets the ACL of a znode
setACL	Sets the ACL in a znode
sync	Synchronizes a client's view of a znode with ZooKeeper

Let's look at the ZooKeeper operations mentioned in the preceding table using ZooKeeper Java shell:

1. Create a znode called root with ThisIsTheRootNode as its data:

   [zk: localhost(CONNECTED) 0] create /root "ThisIsTheRootNode"
   Created /root
   

2. Get the content of the just created znode root:

   [zk: localhost(CONNECTED) 1] get /root
   "ThisIsTheRootNode"
   ...