February 2024
Intermediate to advanced
370 pages
7h
Chinese
Content preview from 数据工程之道：设计和构建健壮的数据系统
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122
|
第
4
章
内容分发网络，而是与互联网服务提供商合作建立了一个定制的
CDN
（
Content Delivery
Networks
，内容分发服务）（
https://oreil.ly/vXuu5
），利用了高度专业化的软件和硬件组
合。对于一家在所有互联网流量中占有相当大比例的公司来说
注
9
，建立这种关键的基础
设施，使其能低成本地向巨大的客户群提供高质量的视频。
1
这些案例研究表明，在特殊情况下，公司管理自己的硬件和网络连接是有意义的。公司
建设和维护硬件的最大的现代成功案例涉及超大的规模（每秒带宽达
EB
、
TB
等）和有
限的用例，其中公司可以通过高度集成的硬件和软件技术栈实现竞争优势。此外，所有
这些公司都消耗了大量的网络带宽，这表明如果它们选择完全从公有云中运作，数据出
口费将是一个主要的成本。
如果你搭建的是真正的云规模服务，请考虑继续在本地运行工作负载或返回云工作负
载。什么是云规模？如果你存储的数据量达到艾字节，或者每秒处理去向和来自互联网
的流量达到太位，那么你可能已经达到了云规模。（实现每秒一太位的内部网络流量是
相当容易的。）此外，如果数据出口成本是你的业务的主要因素，则考虑拥有自己的服务
器。举个云规模工作负载的具体例子，苹果公司若将
iCloud
存储迁移到自己的服务器，
可能会获得巨大的财务和性能优势
注
10
。
2
4.7
构建与购买
构建与购买是技术领域一个久远的辩论。支持构建的论点是，你可以对解决方案进行端
到端的控制，不受供应商或开源社区的限制。支持购买的论点归结为资源限制和专业知
识，你是否有专业知识来建立一个比现有供应的更好的解决方案 ...
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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.