Zookeeper

ZooKeeper - Key Features

Configuration Management: Provides a centralized configuration repository accessible to all nodes.

• Use Case: Need to manage and distribute configuration settings across a distributed system.
• How ZooKeeper Helps: Stores configuration data centrally and ensures consistency across all nodes.

Synchronization: Ensures synchronization and consistency among distributed processes.

• Use Case: Coordination of access to shared resources among distributed processes.
• How ZooKeeper Helps: Provides primitives like locks and barriers to implement distributed synchronization.

Naming Service: Hierarchical namespace similar to a file system for storing metadata.

• Use Case: Microservices need to locate and communicate with each other dynamically.
• How ZooKeeper Helps: Acts as a registry where services can register their locations and consumers can discover available services. -

High Availability: Provides fault tolerance and high availability through replication.

Sequential Consistency: Guarantees ordered updates across distributed nodes.

Watch Mechanism: Allows clients to register for notifications on changes to data.

Leader Election

• Use Case: Selecting a leader among a group of distributed nodes for coordination tasks.
• How ZooKeeper Helps: Uses its consensus protocols to elect a leader node reliably.