常见分布式应用模式 ° Multi- Tier systems -- User Interface Persistent Store separates persistence from logic and logic from presentation all activity originates in user interface arrows represent client-server relation Distributed Systems FrameworksDistributed Systems Frameworks 10 常见分布式应用模式  Multi-Tier Systems  separates persistence from logic and logic from presentation  all activity originates in user interface  arrows represent client-server relation Business Logic User Interface Persistent Store