Daisy senior software engineer RainyDay LLC she implement new feature product feature make product work second make product fast make product correct the company encourage test new feature Daisy appoint intern Demid write test new featuresinterestingly feature pass test Demids development server index 1 fail test serversAfter Demid complete task Daisy appoint deploy feature nserver company for feature f server s Daisy tell want feature f deploy server s if wants deploy feature f fail test server s if want deploy deploy thereyour company important instrument deployment new feature server Continuous Deployment CD Continuous Testing CT CD establish pair server form direct graph CT set set serversif cd configure server s_1 server s_2 time s_1 receive new feature f system start follow deployment process f s_2 if feature f deploy server s_2 Otherwise CT set server s_1 server s_1 deploy feature f server s_2 testing Otherwise server s_1 run test feature f if test fail server s_1 if test pass server s_1 deploy feature f server s_2 you configure cdct system Demid deploy feature development server your cdct system deploy feature exactly set server Daisy wantsyour company lot computing resource establish cd server 264 time