CAP+BASE

I. RDBMS: ACID

2. Distributed storage: CAP+BASE

2.1 CAP

Choose two from three

Consistency

Availability

Partition tolerance: Distributed systems must meet

CA: RDMBMS

AP: Most Site Architecture Options

CP: redis.mongodb

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2.2 BASE

Basically Available

Soft State

Eventually consistence

Distributed system: Give up the system consistency requirement at a certain time in exchange for system scalability and performance improvement.AP