#分布式
之前说DDIA缺少很多技术原理的讲解，我春节期间看分布式事务这部分，DDIA第七章也是点了一下Serializable Snapshot Isolation（简称SSI），但是同样的也是没有给出技术原理的讲解。
就像一个清晰度不够高的图片，初看是感觉什么都有了，想放大了看细节，对不起没有。
初看觉得DDIA是神书，现在也慢慢祛魅了。
（附图是DDIA书中对Paxos等共识算法的一笔带过。一本讲分布式的书，如果不讲共识算法，那有40%以上的东西没讲到）
BY codedump的电报频道
Mr. Durov launched Telegram in late 2013 with his brother, Nikolai, just months before he was pushed out of VK, the Russian social-media platform he founded. Mr. Durov pitched his new app—funded with the proceeds from the VK sale—less as a business than as a way for people to send messages while avoiding government surveillance and censorship.
Telegram has made it easier for its users to communicate, as it has introduced a feature that allows more than 200,000 users in a group chat. However, if the users in a group chat move past 200,000, it changes into "Broadcast Group", but the feature comes with a restriction. Groups with close to 200k members can be converted to a Broadcast Group that allows unlimited members. Only admins can post in Broadcast Groups, but everyone can read along and participate in group Voice Chats," Telegram added.
telegram from us