IDs

Naming things uniquely when there is no single machine to ask: distributed identifiers, time-ordered keys, and coordination-free generation.

Explainers

• Unique IDs at Scale — A single auto-increment counter is trivial — until you shard and it becomes the hardest thing in the system. Watch the fix: pack a clock, a machine id, and a per-millisecond counter into 64 bits, with a scrubbable Snowflake bit-strip and clock-skew you can break.