Moving Allegro’s services and infrastructure from its main Data Center (DC) was considered a huge endeavour fraught with high risk from the very start. This particular Data Center, known as DC2, was situated in Poznań, Poland. It was our first genuine Data Center and back in 2007, when we moved in there, it was the state—of—the—art DC in Poland. For a couple of years our infrastructure was growing along with the company and the number of devices grew up to 2,000 filling 90 rack cabinets in 2014. DC was used by Allegro core sites such as allegro.pl, aukro.ua and aukro.cz as well as other Naspers-owned Polish operations like: payu.pl, olx.pl, ceneo.pl, otomoto.pl, otodom.pl. To make the story simpler, Allegro synonym is used to name them all.