Databases at 14.4Mhz

Hacker News

Why we should stop using Grunt and Gulp

Hacker News

Reverse-engineering the new “captchaless” ReCaptcha system

Hacker News

What happens when your application cannot open yet another connection to MySQL

MySQL Performance Blog

Have you ever experienced a situation where one moment you can connect to the MySQL database and the next moment you cannot, only to be able to connect again a second later? As you may know one cannot open infinite connections with MySQL. There’s a…

Incident Report – DDoS Attack

Hacker News

This past Monday, we experienced a major volumetric DDoS attack which caused significant downtime for our site and the sites of our customers. The attack included sustained traffic of up to 25gb/s and about 50 million packets per second sent to our…

A Simple HTTP API in 100 Lines of Go

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Why the data center needs an operating system

Hacker News

Developers today are building a new class of applications. These applications no longer fit on a single server, but instead run across a fleet of servers in a data center. Examples include analytics frameworks like Apache Hadoop and Apache Spark, message…

Auto-bootstrapping an all-down cluster with Percona XtraDB Cluster

MySQL Performance Blog

One new feature in Percona XtraDB Cluster (PXC) in recent releases was the inclusion of the ability for an existing cluster to auto-bootstrap after an all-node-down event. Suppose you lose power on all nodes simultaneously or something else similar happens…

Eric Hammond: Before You Buy Amazon EC2 (New) Reserved Instances

Planet Ubuntu

understand the commitment you are making to pay for the entire 1-3 years Amazon just announced a change in the way that Reserved Instances are sold. Instead of selling the old Reserved Instance types: * Light Utilization * Medium Utilization * Heavy…

How Naive AB Testing Goes Wrong and How to Fix It

Hacker News

Although classical hypothesis tests are probably still the most widespread technique for online A/B tests, they are not the most appropriate. In this post, I will describe the shortcomings of hypothesis testing for web optimization and propose a method of…