ywugy的专栏

Cockroach提供了零宕机（在线）模式修改、次级索引和外键支持。在提供高可用性的同时，Cockroach还重点强调了一致性，使用每个数据集三个或三个以上的活动副本，所有这些副本都可以同时读/写。除了增加高可用性外，地理上分散的客户端可以连接到最近的服务器进行写入，确保每个客户端的状态在全球范围内都是一致的，在这种情况下，该“多活可用性”模型也很有用。

Title: SDN and NFV Simplified: A Visual Guide to Understanding Software Defined Networks and Network Function Virtualization Author: Jim Doherty Length: 320 pages Edition: 1 Language: English Publisher: Addison-Wesley Professional Publication Date: 2016-03-12

Pro JavaScript Techniques is the ultimate JavaScript book for today's web developer. It provides everything you need to know about modern JavaScript, and teaches you what JavaScript can do for your web sites. This book doesn't waste any time looking at things you already know, but instead concentrates on fundamental, vital topics-what modern JavaScripting is (and isn't), and pitfalls to be wary of. You will learn about the 'this' keyword, as well as new object tools. You will be able to create reusable code with encapsulation, overloading and inheritance. The most recent techniques for debugging and testing are covered comprehensively, with information on Chrome developer tools, Jasmine, PhantomJS and Protractor. This update finishes with chapters on constructing single-page web applications that dominate the modern web. The book is filled with real-world examples and case studies, as well as numerous reusable functions and classes to save you time in your development. You will learn the practical skills needed to build professional, dynamic web applications. Pro JavaScript Techniques is an indispensable reference for any professional JavaScript web developer-enhance your JavaScript development today.

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