Prometheus Extrapolation原理解析
在使用Prometheus的过程中，我们可能遇到过这样的问题：PromQL的delta、increase函数计算一段时间内metric的增长量，返回的结果可能是小数，即便该metric所有的采样值都是整数。为了验证这一点，可以拿promhttp_metric_handler_requests_tot
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使用kubemark进行大规模Kubernetes集群性能测试
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本文主要介绍如何使用kubemark来模拟大规模Kubernetes集群（1000 node），并对其进行e2e性能测试。
NOTE本次测试日期为2018-08-02，最新commit为Merge pull request #66671 from hanxiaoshuai/cleanup07261，
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[Coursera] Big Data Analysis with Scala and Spark 课程笔记
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In
Open Course
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Coursera
Note:This blog is intended to record what I learned in Big Data Analysis with Scala and Spark, rather than share the course materials. So there are tw
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Network Programming Cheet Sheet
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Mainly from Unix Network Programming
Data Types, Functions and Macros
IP Address
1234567891011// IPv4struct in_addr { in_addr_t s_addr;}
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Linux/Mac命令行翻墙
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之前翻墙的方式比较2——用ShadowSocks GUI做代理客户端，然后将Network Manager设置为Proxy模式，通过手动切换ShadowSocks GUI的代理模式来决定是否使用代理。这样配置起来很方便，但说实话，用起来还是挺难受的。主要有这么几点原因：
暑期实习让我养成了禁用Ne
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[Coursera] Parallel Programming 课程笔记
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In
Open Course
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Coursera
Note:This blog is intended to record what I learned in Parallel Programming, rather than share the course materials. So there are two things that I wo
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[Coursera] Functional Program Design in Scala 课程笔记
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In
Open Course
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Coursera
Note:This blog is intended to record what I learned in Functional Program Design in Scala, rather than share the course materials. So there are two th
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[Coursera] Functional Programming Principles in Scala 课程笔记
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In
Open Course
,
Coursera
Note:This blog is intended to record what I learned in Functional Programming Principles in Scala, rather than share the course materials. So there ar
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