This article is to show how simple is to use an SSD cache device to a hard disk drive. We also included statistics and graphs…
Author: neoX
Installing and running BOINC client (with SETI project) under CentOS 7
Here is how you can install a BOINC client and attach it to a project (SETI). We use only command line tools, not GUI involved…
Gentoo init – boot from linux software raid with superblock (metadata) version 1.2 and no autodetect
If you want to use software raid device in your Gentoo Linux system (init boot, not systemd) with boot partition resided in the raid for…
php-fpm memcached – Unknown: Failed to write session data (memcached) when using persistent connections
Several reports in the Internet with such error: But no real solutions worked for us. Here is our setup: Several web servers servers (using php-fpm…
The simplest nagios setup to make a phone call on a critical notification – using twilio service
The aim of this article is to show you the simplest way you can achieve your monitoring Nagios system to make a phone call on…
rsync and selinux – opendir failed: Permission denied
Selinux could sometime mess up with your setup. Let’s say you configured your rsync daemon but still, you get the error related to permissions when…
PHP missing xml extension – Fatal error: Uncaught Error: Class DOMDocument not found
We upgraded one of our servers and at first did not notice this error. Soon logs began to fill with this error: Apparently, we missed…
The impact of enabling MySQL sync_binlog – really high disk IO
If you enable this feature in your MySQL you could increase your disk IO time and write by 8-10x times. Generally, this feature could save…
Dell Inspiron 7352 with 16G DDR3L single SODIMM RAM – it works!
What a great piece of hardware is Dell Inspiron 7352! In the year 2015, this laptop was on the market with 8G DDR3L SODIMM and…
Upgrade MySQL 5.6 to 5.7 what problems to expect with old my.cnf configuration file
Finally, we do not have any more MySQL 5.6 servers. We upgraded our last part of the system with MySQL 5.6 to 5.7. In our…