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2026

Software Engineering

Consistent Hashing: Adding Nodes Without Losing the Cache

Add one server to a cache cluster and the usual approach moves 89% of the cached data. Consistent hashing moves 12%. How it works, built and measured.

Aug 27, 2026 · 9 min readRead

Software Engineering

Bloom Filters: Skipping Lookups That Can Only Miss

Skip slow lookups for things that were never stored: a Bloom filter answers "definitely not here" for a million keys in 1.14 MiB instead of 88 MB.

Aug 20, 2026 · 9 min readRead

Software Engineering

LRU Caches: Constant-Time Eviction for Real Systems

When a cache fills up, something has to go. An LRU cache drops whatever was used longest ago, instantly. How to build one, and when to pick another rule.

Aug 9, 2026 · 6 min readRead

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