How to generate LA? Sometimes you need to simulate load on your server to check system behavior under heavy load. My case was to check scalability script that monitors backend load and creates new hosts in Digital Ocean. Previously I wrote the article about Load Average and the meaning of this metric. Here you can … Continue reading How to generate LA?
Private Docker Registry (on Debian8) A Docker registry in the repository of images your created or downloaded. Registry may be public or private. If you using docker in your organisation you’ll definitely want your images to be secured. So, it’s time to deploy your own private docker registry. Let’s start with the initial conditions. This … Continue reading Private Docker Registry
Redis replication and availability Redis Replication and availability can be achieved by using sentinel servers. Sentinel is available in redis starting with 2.8 version. Firs of all we need redis. You can download it from the official web-site – http://redis.io or install it from the repo in your OS. I will use Debian in this … Continue reading Redis replication and availability
Debian performance tuning via dynamic CPU frequency scaling Dynamic CPU frequency scaling (also known as CPU throttling) is a technique in computer architecture where a processor is run at a less-than-maximum frequency in order to conserve power. cpufrequtils is used to control the CPU frequency scaling deamon. Frequency scaling allows you to set the CPU … Continue reading Debian performance
Upgrade Debian This is a short instruction how to upgrade Debian Wheezy to Jessie. The Article describes an upgrade process from Debian Wheezy to Debian Jessie. For now Debian Linux with a code name “Jessie” is the latest stable Debian release. It is very important to create a backup before upgrade Debian system. The less … Continue reading Upgrade Debian