1 Some Words

一直在想，到底要不要在博客上写英文。如果不写，我平时英语如何提高？如果写，我又觉得自己写来写去也就那些词汇，实在寒碜，未必就有进步。

所以不仅要坚持写，还要做到以下几点
1） 每天都要积累新的词汇。要有像样的输入，才会有像样的输出；
2） 要尽量用朴实，易懂的英文来解释复杂的事情。

至于怎么积累，确实是个问题。可以试着平时有空多看看英文论文，手机英文公众号，多记录。

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2 Basic introduction

The book info: “Designing Distributed Systems–patterns and paradigms for scalable, reliable services”, written by Brendan Burns.

the content:

1. introduction

• Systems development
• pattens in software development
• value of patterns, practice, and components
• summary

Part I: Single-node patterns
2) Sidecar pattern

• an example sidecar: adding https to a legacy service
• dynamic configuration with sidecars
• modular application container
• building a simple PaaS with sidecar
• designing sidecars for modularity and reusability
• documenting your containers

3. Ambassadors

• use an ambassador to shard a service
• use an ambassador for service brokering
• to do experimentation or request splitting

4. Adapters

• monitoring
• logging
• adding a health monitor

Part II. Serving patterns
5) replicated load-balanced services

• stateless services
• session tracked services
• application-layer replicated services
• introducing a caching layer
• expanding the caching layer
• summary

6. sharded services

• sharded caching
• an examination of sharding functions
• sharded, replicated serving
• hot sharding systems

7. scatter/gather

• with root distribution
• with leaf sharding
• for reliability and scale

8. functions and event-driven process

• determine when FaSS makes sense
• patterns for FaSS

9. Ownership election

• determine if you even need master election
• the basics of master election
• concurrent data manipulation

Part III. Batch computational patterns
10) work queue systems

• a generic queue system
• implementing a video Thumbnailor
• dynamic scaling of workers
• multi-worker pattern

11. event-driven batch processing

• patterns of ~
• build an event-driven flow for new user sign-up
• publisher/subscriber infrastructure
• deploy kafka

12. coordinated batch processing

• join
• reduce
• an image tagging and processing pipeline

13. conclusion: a new beginning

3 Unfamiliar words

• Colophon: [ˈkɒləfən] 书籍末页。
• sparrow: a small brown bird that is very common in Britain.麻雀
• paradigm: a typical example or pattern of sth.范例，样式。
• scalable 可伸缩，可扩展
• orchestrator: 协调器
• azure: bright blue in colour like the sky. 天蓝色
• strategist: a person who is skilled at planning things, especially military activities. 战略家
• legacy: 遗留，遗产
• ambassador: an official who lives in a foreign country as a senior representative there of his or her own country. 大使
• infrastructure: basic systems and services necessary for a country or an organization to run smoothly, for example buildings, transport and water and power supply 基础设施

写作时间：2018-06-13