August 2019
Beginner to intermediate
232 pages
3h 50m
Chinese
Content preview from Web容量规划之美
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35
第2章
设定容量目标
不知道要造什么建筑之前，你肯定不会先搅拌混凝土。同样地，在没有确定网站
或移动应用
App
的性能、可用性和可靠性需求之前，不应该开始规划容量。正如
在第
1
章提到的，随着终端用户的期望发展，需求发生了变化。需求也是该技术
的功能，例如，使用虚拟机（
VM
）而不是使用容器。因此容量规划不是一蹴而就的，
而是持续进行的。
容量规划涉及很多假设，这些假设与你需要容量的目的有关，其中有些很明显，
而有些则不然。例如，如果你不知道网页应该在
3
秒内有响应，那么你会很难确
定需要多少台服务器才能满足性能需求。更重要的是，当流量增长时需要增加多
少台服务器将变得更加困难。
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.