ID Generation Strategies in System Design: Base62, UUID, Snowflake, and Beyond
Apr 5 · 23 min read · TLDR: Short shareable IDs need Base62 (URL shorteners). Database primary keys at scale need time-ordered IDs (Snowflake, UUID v7). Security tokens need random IDs (UUID v4, NanoID). Picking the wrong strategy either causes B-tree fragmentation at 50M...
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