Apache Kafka - Partition Replication and ISR (In-Sync Replicas)

Apache Kafka - Partition Replication and ISR (In-Sync Replicas) | Kafka Fundamentals for Admins

Unlock the secrets behind Apache Kafka’s powerful replication system! In this hands-on admin-focused session, you’ll explore how Partition Replication and In-Sync Replicas (ISR) ensure reliability, durability, and fault tolerance in distributed Kafka clusters. This video is ideal for admins, engineers, and enthusiasts who want to see Kafka’s core concepts in action—especially partitioning, replication, and monitoring the health of their event streaming platforms.

What’s Covered:

Partition Replication in Practice: Step-by-step walkthrough in a small, containerised Kafka cluster

Understanding ISR (In-Sync Replicas): What they are, why they matter

Hands-On Demo: Creating topics with varying replication factors, showing different cluster states

Simulating Failures & Recovery: Deleting a broker/replica, observing what happens to replicas and ISRs, and how Kafka maintains data integrity

Interpreting Under-replication Issues: How to spot, diagnose, and respond to replica and ISR challenges

Key Takeaways:

Learn why replication and ISRs are essential for production-grade Kafka clusters

See under-replication, failpoints, and recovery in action

Gain confidence in troubleshooting Kafka replication scenarios

Who is this for?
Anyone working with real-time data, interested in the practical side of Kafka’s “high availability” features—or engineers preparing for DevOps, SRE, or data engineering roles.

Find all commands, resources, and hands-on labs in the GitHub repo:
github.com/mordp1/kafkaskewer/tree/main/kafka-fundamentals-admin/Day5/

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