Network Partition
A break in communication between nodes in a distributed system. Some nodes can't reach others. The 'P' in CAP theorem that forces the trade-off between consistency and availability.
What is Network Partition?
A break in communication between nodes in a distributed system. Some nodes can't reach others. The 'P' in CAP theorem that forces the trade-off between consistency and availability.
Network Partition is a foundational concept that sits in the Core Fundamentals 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 "Network Partition" 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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See also
Related glossary terms you might want to look up next.
CAP Theorem
In a distributed system, you can only guarantee two of three: Consistency, Availability, and Partition tolerance. You must choose your trade-off.
Split Brain
A failure scenario where a network partition causes two halves of a cluster to operate independently, each believing it's the leader. Can cause data corruption if not handled.
Fault Tolerance
A system's ability to keep operating correctly even when some of its components fail. Achieved through redundancy, replication, and graceful degradation.