Zookeeper: Example
Explore how Zookeeper manages distributed systems by working through a practical example involving znodes and notifications. Understand how to implement distributed locks using sequential ephemeral znodes to coordinate access and ensure mutual exclusion, supporting leader election. This lesson helps you grasp the core mechanisms Zookeeper provides for synchronization and process coordination in Big Data environments.
We'll cover the following...
Example
So what kind of problems can Zookeeper solve? Zookeeper’s higher-level constructs can solve several common distributed systems problems. A list of such recipes appears on the official project website. We’ll work with a simple problem to demonstrate the use of Zookeeper API. We’ll write a program that has a spawned thread, create a znode and update it with a new value after every second for a total of five times. A watch is set on the same znode in the main thread. Notifications are received whenever the znode value changes. The values are printed on the console. The code for the ...