AlexWebLab

Explore a wide range of web development topics, from JavaScript to React and beyond, and uncover valuable insights to enhance your skills.

Latest 2 articles:

Caches, CDNs, and Database Indexes: Three Different Ways to Make Reads Fast

June 10, 2026Data Systems

Not all performance wins come from the same layer. Caches, CDNs, and database indexes all speed up reads, but they solve different bottlenecks and create different failure modes around staleness, invalidation, and query cost.

Replication, Sharding, Quorum, and CAP Theorem: Why Distributed Data Feels Weird in the UI

June 8, 2026Scalability & Reliability

As soon as data lives on multiple nodes, familiar assumptions break. Replication, sharding, quorum rules, and CAP tradeoffs determine whether your reads are fresh, your writes are durable, and your product feels coherent under failure.

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