January 2018
Beginner to intermediate
234 pages
7h 8m
Chinese
Content preview from Kafka权威指南
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130
｜
第
8
章
whitelist
这是一个正则表达式，代表了需要进行镜像的主题名字。所有与表达式匹配的主题都
将被镜像。在这个例子里，我们希望镜像所有的主题，不过在实际当中最好使用类似
“
prod.*
”这样的表达式，避免镜像测试用的主题。在双活架构中，
MirrorMaker
将
NYC
数据中心的数据镜像到
SF
，为其配置了 whilelist=
"
NYC.\*
"
，这样就不会将
SF
的主题
重新镜像回来。
8.3.2
在生产环境部署
MirrorMaker
在上面的例子里，我们是从命令行启动
MirrorMaker
的。在生产环境，
MirrorMaker
一般是
作为后台服务运行的，而且是以 nohup 的方式运行，并将控制台的输出重定向到一个日志
文件里。这个工具有一个 -deamon 命令行参数。理论上，只要使用这个参数就能实现后台
运行，不需要再做其他任何事情，但在实际当中，最近发布的一些版本并不能如我们所期
望的那样。
大部分使用
MirrorMaker
的公司都有自己的启动脚本，他们一般会使用部署系统（比如
Ansible
、
Puppet
、
Chef
和
Salt
）实现自动化的部署和配置管理。
在
Docker
容器里运行
MirrorMaker
变得越来越流行。
MirrorMaker
是完全无状态
的，也不需要磁盘存储（所有的数据和状态都保存在
Kafka
上）。将
MirrorMaker
安
装在
Docker
里，就可以实现在单台主机上运行多个
MirrorMaker
实例。因为单个
MirrorMaker
实例的吞吐量受限于单个生产者，所以为了提升吞吐量 ...
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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.