September 2021
Beginner to intermediate
392 pages
12h 13m
Chinese
book
Google系统架构解密： 构建安全可靠的系统
by Heather Adkins, Betsy Beyer, Paul Blankinship, Piotr Lewandowski, Ana Oprea, Adam Stubblefield
Content preview from Google系统架构解密： 构建安全可靠的系统
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调查系统
｜
241
换值班和响应团队的成员。编写文档及向其他人阐释系统的过程也有助于反思和回顾对系
统的理解程度。此外，还可以借助红队（参见第
20
章）来测试被忽视的盲点。
5.
复现缺陷
尽量尝试在生产环境外复现错误，这样做主要有两个优点。
•
操作不会影响为实际用户提供服务的系统。这样一来就不用担心操作会使系统崩溃或使
数据被破坏。
•
由于不会暴露任何敏感数据，因此可以让很多人参与调查，不用担心引发数据安全问题。
还可以启用不会影响实际用户数据的操作，以及诸如额外日志记录之类的功能。
有时在生产环境之外做调试行不通。这也许是因为只有到达一定规模的时候才能触发错
误，或无法在隔离环境中触发错误。上述临时文件的案例就属于这样的情况：无法在服务
满载的情况下复现该错误。
6.
隔离问题
如果问题可以复现，下一步就是将问题隔离起来。理想情况是将其缩小到仍能呈现问题的
最小代码子集。可以通过禁用组件或临时注释掉子例程，直至将问题暴露出来。
在之前举的临时文件示例中，一旦发现内存管理在所有服务器上的表现都很奇怪，就不需
要在受影响的机器上逐台调试全部组件。再举一个例子，假设有一台服务器（位于一个大
的系统集群中）突然发生高延迟或错误。该场景是对监控、日志和其他可观察性系统的标
准测试：能否在系统中的众多服务器中快速定位到一台存在问题的服务器？更多信息请参
见
15.1.3
节。
还可以在代码中隔离问题。举一个具体的例子，我们最近对一款内存预算非常有限的程序
内存使用情况做了调查。具体来说，我们检查了线程栈的内存映射。尽管我们的心理预期 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.