Cluster

Cluster Managers: YARN and Kubernetes

Learn how Apache Spark integrates with YARN and Kubernetes to acquire and manage cluster resources for distributed jobs.

Setting Up a Hadoop Cluster

A practical walkthrough of planning and configuring a Hadoop cluster, from single-node pseudo-distributed setups to multi-node production layouts.

Multi-Cluster Warehouses

Understand how multi-cluster warehouses handle high concurrency by automatically adding and removing compute clusters.

RabbitMQ Clustering Basics

Learn how RabbitMQ nodes join together to form a cluster, how metadata and queue state are shared, and what happens when nodes fail.

Cluster Autoscaling

Learn how the Cluster Autoscaler adds and removes worker nodes so Pod-level autoscalers always have capacity to grow into.

Elasticsearch Cluster Architecture

How Elasticsearch nodes join together into a cluster, elect a master, and coordinate to store and serve data reliably.

Elasticsearch Interview Questions

Commonly asked Elasticsearch interview topics covering architecture, indexing internals, and querying, with worked explanations.

Monitoring Elasticsearch

Which metrics, APIs, and alerting practices keep an Elasticsearch cluster healthy and catch problems before they cause outages.

Brokers and the Kafka Cluster

How individual Kafka brokers form a cluster, how partitions are distributed and replicated across them, and how the cluster handles broker failure.

Sharding in MongoDB

How MongoDB distributes data across multiple shards using shard keys, chunks, and a query router to scale horizontally beyond a single server's capacity.

Redis Cluster Explained

How Redis Cluster shards data across multiple nodes using hash slots, and how it handles failover and multi-key operations.

kubectl Basics

A practical introduction to kubectl, the command-line tool used to interact with a Kubernetes cluster's API server.

Kubernetes on Cloud (EKS/AKS/GKE) Cheat Sheet

Compares AWS EKS, Azure AKS, and Google GKE managed Kubernetes offerings and shows cluster creation commands for each.

Flux CD Cheat Sheet

GitOps toolkit for Kubernetes covering GitRepository/Kustomization/HelmRelease CRDs, the flux CLI, and multi-tenancy setup.