is it normal that i main genji , hate anime , hate weebs , and only play him because i have experience from scout in tf 2 <| sep |> We have ~ 130 VM hosts running Xen on CentOS in two separate data centers , with close to 2 , 600 vCPUs and 4 . 5 TB of memory across all hosts . About half of the VM hosts were purchased within the last four years , about a growth of 15 VM hosts per year . The majourity of our hardware runs on SuperMicro mainboards and 1 U chassis . We are running ~ 350 guests of various sizes . The operating systems those guests are running are approximately 70 % CentOS 5 20 % CentOS 6 5 % CentOS 7 5 % other Ubuntu , Fedora , etc . ~ 70 % of these guests are production and infrastructure related systems , the rest are nonproduction development , qa , etc . # rcentos white spaceWriting this I ' m realising the huge task we have in front of us to replaceupgrade our CentOS 5 guests . It goes EOL in a few months , which probably means we ' ll be halfway done in a couple years . These servers are doing a myriad of things App servers code written in house , messaging systems RabbitMQ , database servers MySQL , Cassandra , web servers both Apache and Nginx are used in our environment , buildcideployment systems , repositories git , CentOS mirrors , internal yum repositories , and more . And last , but not least , we are using CentOS 6 for our routers and VPN tunnels in both data centers . The routers are running bare metal . CentOS makes for a fast , stable , and inexpensive router .