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.

Why is row-based binlog format required for CDC tools like Debezium?

CDC tools need the actual before/after row data to produce change events, statement format only has SQL text, CDC tools produce structured change events with before and after values. Row-based binlog contains exactly this. Statement-based binlog just contains SQL text, the CDC tool would have to re-execute the SQL to know what changed, which is impractical and non-deterministic.

A MySQL replica has a single-threaded SQL thread applying binlog events. During a write burst on the primary, what happens?

The replica falls behind because it applies events sequentially while the primary writes in parallel, The primary writes in parallel across many connections, but the single-threaded SQL thread on the replica processes events one by one. During bursts, the relay log grows faster than it's consumed. Multi-threaded replication (replica_parallel_workers) solves this by applying non-conflicting transactions concurrently.

Your MySQL primary is in us-east-1 and you want to enable semi-synchronous replication to a replica in eu-west-1 (~80ms away). What's the trade-off?

Every COMMIT waits an extra ~80ms for the replica's I/O thread to acknowledge receipt, increasing write latency, Semi-sync makes the primary wait for the replica's I/O thread to acknowledge receiving (not applying) the event. Cross-region, that adds ~80ms to every commit. This is why most teams only use semi-sync within the same region (~0.5ms) and use async replication cross-region.

Binlog Replication

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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