What is Apache ZooKeeper?

Apache Zookeeper is a service that is used by clusters (node groups) to coordinate between themselves and to maintain shared data through robust synchronization techniques. Zookeeper itself is a distributed application that provides services for writing to distributed applications.

The common services provided by zookeeper are as follows:

• Naming Service -Identifies the nodes in the cluster by name. It is similar to DNS, but only for nodes.

• Configuration Management -joins the latest and most recent system configuration information for the node.

• Cluster Management -join/Leave nodes in the cluster and node state in real time.

• election algorithm -election of a node as a leader for coordination purposes.

• Lock and Sync service -locks data while modifying data. This mechanism helps you perform automatic failback when connecting to other distributed applications, such as Apache HBase.

• highly reliable Data registry -data can be obtained even when one or several nodes are closed.

Distributed applications offer a number of benefits, but they also throw up some complex and difficult-to-solve challenges. The Zookeeper framework provides a complete mechanism to overcome all challenges. Race conditions and deadlocks are handled using the fail-Safe synchronization method . Another major drawback is the inconsistency of data, zookeeper using atomic parsing.

Benefits of Zookeeper

The following are the benefits of using zookeeper:

• A simple distributed coordination process

• Synchronization -the mutual exclusion and collaboration between server processes. This process helps Apache hbase with configuration management.

• An orderly message

• serialization -encodes the data according to a specific rule. Ensure that the application runs consistently. This method can be used in mapreduce to coordinate the queue to execute a running thread.

• Reliability

• atomicity -The data transfer is completely successful or fails completely, but no transaction is part.

What is Apache ZooKeeper?