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.

Your application makes 80 individual SELECT queries per page load, each taking 2ms. What's the simplest locality optimization?

Batch the 80 queries into fewer queries using IN clauses to reduce network round trips, 80 queries at 2ms each = 160ms, mostly network overhead. Batching into 2-3 queries with IN clauses could reduce this to 6ms. The database work is trivial. It's the 80 network round trips that kill you.

What's a 'covering index' and why does it help locality?

An index that contains all columns the query needs, so the database never reads the main table, A covering index includes all columns referenced in a query. Since indexes are smaller and more likely to fit in RAM, the database can answer the query entirely from the index without touching the heap table on disk, keeping data access local to memory.

Your AWS bill shows $4,000/month in cross-AZ data transfer. What's likely happening?

Your application servers and databases are in different availability zones, AWS charges $0.01/GB for traffic between availability zones. If your app is in us-east-1a and your database is in us-east-1c, every query and response crosses zones and incurs charges. Co-locating them in the same zone eliminates this cost and reduces latency.

Data Locality Optimization

Name: System Design Masterclass
Availability: InStock

in Data Replication Distribution

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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Foundation lessons free, try before you buy

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India

₹999₹499/lifetime

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Foundation lessons free, try before you buy

Founders price, locked for the first 10,000 customers

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

Anish K., Senior Engineer at a Bengaluru startup

All 766 interactive lessons

Step-by-step animated diagrams

Live code editors with real execution

Quizzes with instant feedback

Completion certificates per level

Lifetime access, all future content included

The first 5 Foundation lessons are free, no payment needed. Try them now