CRDT
Conflict-free Replicated Data Type: a data structure that can be updated independently on different nodes and merged automatically without conflicts. Powers real-time collaboration like Google Docs.
What is CRDT?
Conflict-free Replicated Data Type: a data structure that can be updated independently on different nodes and merged automatically without conflicts. Powers real-time collaboration like Google Docs.
CRDT is a advanced concept that sits in the Distributed Systems Core area of system design. Engineers reach for it whenever they need to reason about real-world trade-offs in that space — not just for textbook correctness, but because real production systems at companies like Netflix, Amazon, and Google make these decisions every day.
If you want to go deeper than this definition — with diagrams, code, and a quiz to lock it in — work through the "CRDT" lesson linked below. It walks through the why, the mechanism, the trade-offs, and how the giants actually use it in production.
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Full interactive lesson with diagrams, code examples, real-world references, and a quiz.
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Lessons that touch on CRDT as part of a larger topic.
See also
Related glossary terms you might want to look up next.
Eventual Consistency
A consistency model where updates propagate asynchronously and all replicas will eventually converge to the same value. Trades immediacy for availability.
Multi-Leader Replication
A replication topology where multiple nodes accept writes independently and sync with each other. Useful for multi-datacenter setups but creates conflict resolution challenges.
Vector Clock
A logical clock that tracks causality across distributed nodes using a vector of counters. Each node increments its own counter and merges vectors on message receipt.