October 2020
Intermediate to advanced
261 pages
5h 32m
Chinese
Content preview from Graphite监控
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Carbon
｜
31
致显著的性能问题。
Carbon
聚合器（
carbon-aggregator
）能够解决上述两种情况中的问题。这个守护进程
允许你定义规则，这些规则包括一个或多个源指标（使用通配符），一种聚合方法（
sum
或
average
），一个在发布聚合结果前缓冲数据的时间窗口（单位是秒），以及一个新指标
名称。聚合器从
aggregation-rules.conf
文件加载规则。请注意，
carbon-aggregator
会
监视该文件，并在文件的修改时间发生变化时自动重新加载规则。
我们将在第
4
章讨论配置的细节，这里先通过示例
3-1
简要进行介绍。
示例3-1：简单的
carbon-aggregator
规则
<env>.applications.<app>.all.requests
（
60
）
= sum <env>.applications.<app>.*.requests
<env>.applications.<app>.all.latency
（
60
）
= avg <env>.applications.<app>.*.latency
一般来讲，这个守护进程通常会夹在中继器和缓存之间，但这不是一个严格的要求。事
实上，
carbon-aggregator
与
carbon-relay
共享许多代码，这意味着它也被设计为将
指标传递给后端的一个或多个缓存。但是，它不像中继器一样有不同的路由方法。聚合
器只支持到下游目的地的一致性哈希路由。因此，如果你需要采用基于规则的路由，则
要在聚合器和缓存之间插入一个或多个中继器。 ...
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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.