Is this a video course?

No. This is an interactive, slide-based learning platform. Each lesson has rich text, animated diagrams, live code editors, and quizzes. You learn by reading, interacting, and doing, not by watching videos passively.

How long do I have access?

Forever. Both pricing tiers are one-time payments with lifetime access. This includes all current 766 lessons and any future content we add.

What level of experience do I need?

None. We start from absolute basics like 'What is latency?' and build up to distributed consensus protocols. The Foundation level assumes zero prior knowledge of system design.

How much does the system design course cost?

7.99 US dollars for lifetime access globally, or 499 Indian rupees for lifetime access in India. One-time payment, no subscription, no hidden fees. 11 lessons are free with no signup required.

What technologies are covered?

Everything from DNS and load balancers to Kubernetes, Kafka, distributed databases, consensus protocols, stream processing, security architecture, and observability. We cover principles and real-world implementations used at Netflix, Google, Amazon, Uber, Stripe, and more.

Is this useful for system design interview preparation?

Yes. The lessons are structured around the exact topics asked in system design interviews at FAANG and top-tier companies. Interactive diagrams help you practice whiteboard-style explanations. Covers everything from URL shortener design to distributed payment systems.

How is this different from ByteByteGo or Educative?

766 interactive lessons (4x more than most competitors), 16 different diagram types that build step by step, real production examples from Netflix, Google, Amazon, Uber, and Stripe, and lifetime access for a one-time payment of $7.99 instead of annual subscriptions costing 100 to 200 dollars per year.

What does 'level-triggered' mean in the context of Kubernetes controllers?

Controllers react to the current state of the system, not the specific event that caused the state change, making them resilient to missed events, An edge-triggered system reacts to events: 'pod crashed' triggers 'create pod.' If the event is missed, the pod stays dead. A level-triggered system reacts to state: 'desired 3 pods, actual 2 pods' triggers 'create 1 pod,' regardless of why there are only 2. If an event is missed, the next reconciliation loop catches the discrepancy.

Why must reconciliation logic be idempotent?

Because the reconciliation loop runs repeatedly. Applying the same reconciliation multiple times must produce the same result without creating duplicate resources., The reconciliation loop runs every few seconds plus on every relevant event. If 'create a pod' is not idempotent, the controller might create duplicate pods on every iteration. Idempotent reconciliation means: 'ensure exactly 3 pods exist.' If 3 exist, do nothing. If 2 exist, create 1. Running this logic 100 times produces the same result as running it once.

Why do Kubernetes controllers do periodic resyncs even when the watch stream is delivering events?

Because watch connections can drop during network partitions, and resyncs catch any state drift the watch stream missed, Watch streams are not 100% reliable. HTTP/2 connections can drop. API server restarts can lose in-flight events. Network partitions can delay delivery. Periodic resyncs (every 30 seconds to 10 minutes) re-list all objects and reconcile. If a watch event was missed, the resync catches it. This is belt-and-suspenders reliability.

Reconciliation Loops

Name: System Design Masterclass
Availability: InStock

in Kubernetes Containers

This lesson is part of the full System Design Masterclass. Unlock it along with 765 other lessons for a one-time payment.

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India

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Foundation lessons free, try before you buy

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“The interactive diagrams alone are worth way more than the price.”

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