Lua is a tiny but powerful programming language. Due to its small memory footprint (about hundreds of kilobytes) it’s widely used in application which need to be extended with more complex logic. For instance, Salvatore Sanfilippo has published a post describing how you can use power of Lua with Redis. It also applied to nginx, [...]
In Supportex we monitor a lot of web services and devices. One of the most convenient ways to monitor various parameters is SNMP extend feature. Let’s consider how it works. Assume you already have SNMP daemon installed. Firstly you need to add configuration line in you SNMP daemon config and restart daemon: extend raid-md0 /usr/local/bin/check_md_raid.pl [...]
Almost all modern servers are shipped with RAID controllers – redundant array of independent disks. Despite the fact that this technology was invented more than twenty years ago, nowadays the importance of it can scarcely be exaggerated. In most cases your hosting provider cares about RAID initial setup. So if you don’t want to know [...]
