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#Scalability

4 guides~22 min totalupdated Jul 6, 2026

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Rate Limiting Explained: Token Bucket, Leaky Bucket, and When Each Wins (2026)

Rate limiting explained in 2026 — fixed window, sliding window, token bucket, and leaky bucket, which algorithm to default to, and why LLM traffic is limited by tokens rather than requests.

Beginner · 5 min

Software Architecture

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BeginnerHorizontal vs Vertical Scaling: Scale Up Until You Can't (2026)Horizontal vs vertical scaling in 2026 — scale up (a bigger box) versus scale out (more boxes), the hardware ceiling, why horizontal needs statelessness, and the diagonal middle ground.5 min BeginnerLoad Balancers Explained: Health Checks Do the Real Work (2026)Load balancers explained in 2026 — L4 vs L7, the algorithms, and why health checks (not even distribution) are the part that actually keeps you online.5 min BeginnerCaching Strategies: Why Invalidation Is the Hard Part (2026)Caching strategies in 2026 — the patterns (cache-aside, write-through, write-behind), eviction policies, and why cache invalidation, not adding a cache, is the genuinely hard part.7 min

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