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Questions and Answers
哪个定理阐述了网络服务无法同时实现一致性、可用性和分区容错性？
哪个定理阐述了网络服务无法同时实现一致性、可用性和分区容错性？
- CAP定理 (correct)
- AC定理
- AP定理
- PC定理
机械硬盘的顺序读/写速度大约比随机读/写性能快多少倍？
机械硬盘的顺序读/写速度大约比随机读/写性能快多少倍？
- 50倍
- 200倍
- 10倍
- 100倍 (correct)
哪种数据库优先考虑性能而非一致性？
哪种数据库优先考虑性能而非一致性？
- 所有数据库都优先考虑一致性
- AP数据库 (correct)
- CA数据库
- CP数据库
为了提高性能效率，随机读/写应该转换成什么？
为了提高性能效率，随机读/写应该转换成什么？
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分布式系统需要考虑哪些因素才能确保系统的一致性和可用性？
分布式系统需要考虑哪些因素才能确保系统的一致性和可用性？
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使用什么作为主键是推荐的？
使用什么作为主键是推荐的？
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Study Notes
- Data consistency in distributed systems is more complex due to lack of shared memory and global clock.
- Network timeouts in distributed systems require highly fault-tolerant solutions.
- CAP theorem states that network services cannot simultaneously achieve consistency, availability, and partition tolerance.
- Databases can be categorized into CA, CP, and AP based on their ability to achieve consistency, availability, and partition tolerance.
- CA databases are single-node clusters with limited partition tolerance.
- CP databases prioritize consistency and partition tolerance over performance.
- AP databases prioritize availability and partition tolerance over data consistency.
- CAP theorem presents a trade-off between consistency, availability, and partition tolerance.
- Distributed systems require careful consideration of data consistency and system availability.
- Distributed systems can be challenging to design and maintain due to their complex nature.
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