CDR and Deep in IT are linked IT servers. They have existed on the Czech internet since 1998. They used several editing systems. Our team offered (installed) Drupal 6. After several years, Drupal 6 was redesigned and replaced by Drupal 7. Although CDR and DIIT are divided, the content of their work is partially interconnected and both servers have unique Drupal installation now. The administration of all webs is much easier. These webs are visited by hundred thousands of people every month. Due to power optimizations, made by out team, it is possible to operate both sites with much lower power requirements than it would normally need. Users therefore do not wait for page to load during the evening peak hours.