Sorted:

Apache Pig CROSS Operation Explanation

ZooKeeper Cluster Modes Explained

ZooKeeper Client Timeout: Purpose Explained

ZooKeeper Config Management Setup Guide

ZooKeeper Ephemeral Nodes Explained

How ZooKeeper Generates Sequence Numbers

ZooKeeper Watcher Mechanism Explained

Cassandra Database: Scalable NoSQL Guide

How to Modify ZooKeeper Data Nodes

Cassandra Data Model Explained