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Performance & Caching

Caching strategies, Redis, CDN, eviction policies, and multi-level cache architectures for production systems.

Courses

Intermediate11 hours

Learn how to design scalable, reliable, and maintainable systems — from single servers to distributed architectures used by millions of users.

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Intermediate10 hours

Caching

From fundamentals to production — caching strategies, eviction policies, invalidation, Redis, CDN caching, and multi-level architectures with hands-on patterns throughout.

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Articles

Database Indexing Explained: B-Trees, Composite Indexes, and Query Optimization

A query that takes 4 seconds without an index takes 0.2ms with one. That's a 20,000x improvement from a single line of SQL. Indexes are the …

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Observability: Logs, Metrics, and Traces

When a production system breaks at 3am, you need to answer three questions fast: what happened, how bad is it, and where is the bottleneck? …

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Caching Strategies: Redis, CDN, and Multi-Level Caches

Caching is the fastest way to scale a system without changing your database or adding servers. Done right, it cuts database load by 90%, dro…

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Load Balancing: Layer 4 vs Layer 7

Load balancers distribute incoming traffic across multiple servers so no single machine becomes a bottleneck. But not all load balancers wor…

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How to Choose the Right Database

Picking a database is not about finding the fastest engine — it is about matching storage to the shape of your data. Start with one question…

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