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System Design · Concept

Sharding

Sharding splits data across databases so each database manages only part of the data. It can improve scale and parallel writes, but it adds routing, rebalancing, and cross-shard query complexity.

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Syntax

shard = chooseShard(shardKey)

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  • Federation
  • Replication
  • Consistent hashing
  • Denormalization
  • Database

Source: system-design-primer/README.md at master · donnemartin/system-design-primer · GitHub. Checked 2026-11-03.