Reprinted ----- translation of key knowledge points in MartinFowler's NoSQL Essence

MartinFowler is an internationally renowned OO expert and one of the founders of agile development methods. He is now the chief scientist of ThoughtWorks. martinFowler is a world-class expert in Object-Oriented Analysis and Design, UML, pattern, software development methodology, XP, and refactoring. He is now the chief scientist of ThoughtWorks. Thoug

Martin Fowler is an internationally renowned OO expert and one of the founders of agile development methods. He is now the chief scientist of ThoughtWorks. martin Fowler is a world-class expert in Object-Oriented Analysis and Design, UML, pattern, software development methodology, XP, and refactoring. He is now the chief scientist of Thought Works. Thoug

Martin Fowler is an internationally renowned OO expert and one of the founders of agile development methods. He is now the chief scientist of ThoughtWorks. martin Fowler is a world-class expert in Object-Oriented Analysis and Design, UML, pattern, software development methodology, XP, and refactoring. He is now the chief scientist of Thought Works. Thought Works is a company engaged in enterprise application development and integration. As early as 1980s, Fowler was an advocate who used object technology to build multi-layer enterprise applications. He wrote several classic books: Analysis Mode, UML essence, and refactoring. He changed the pattern of human software development. He was honored by developers as "Godfather" and never talked to the media about anything other than technology. Martin Fowler, a mysterious scientist, finally opened his mind for the first time and told his story.

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1. Nosql does not have a legal definition. Although relational databases have been successfully applied for 20 years, they are not designed to run effectively on Cluster Storage. Although Nosql does not have a uniform definition, it has the following common features:

2. The concept of clustered aggregate is proposed, and the Key-value, document, and column-family databases are both oriented to clustered database aggregate-oriented database.

3. Further analysis of the features of the nosql data model, including Graph database

4. The distributed model includes two methods: Sharding and Replication. Generally, the system implements one or two methods.

There are two types of Replication: Master-slave and peer-to-peer.

5. consistency.

6. Version stamp Version Stamps

Version can be used to detect concurrency conflicts. Once a data is updated, the version stamp is changed in the U.S. space.

You can use counters, guids, hash, timestamps, or their combinations to create version stamps.

In distributed scenarios, the version stamp vector table can detect conflicting update operations on different nodes.

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Address: Translation of key knowledge points in Martin Fowler's NoSQL Essence

Address: Key Points from NoSQL Distilled

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