How to generate LA?

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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?

FreeBSD htop

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FreeBSD htop Finally htop released on FreeBSD! It took 10 releases of the FreeBSD to get htop. Htop is a very useful utility that I was missing in FreeBSD. So, good news, htop is now available from the FreeBSD ports collection or packages(pkg). The installation of the htop is very easy. Installation FreeBSD htop takes … Continue reading FreeBSD htop

GeoIP log analysis with bash

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GeoIP log analysis with bash. Running websites or other online services usually we want to get as much statistics about visitors as possible. There are plenty of system that can provide us web-based statistics. But there is another way. True admin/devops way is to analyse logs. Any service can provide access logs: nginx, apache, haproxy, … Continue reading GeoIP log analysis with bash

Mysql master-slave replication with percona xtrabackup

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Mysql master-slave replication with percona xtrabackup This replication will be seted up with Percona tools and xtrabackup. The replication in MySQL performs via binary logs. Replication is only asynchronous. In version Mysql-5.6 GTID (Global Transaction IDentifier) appeared. In theory replication is the process when master servers sends updates to slave server. Next I’m going to … Continue reading Mysql master-slave replication with percona xtrabackup