Canary vs blue-green deployment to reduce enterprise downtime
Even before the cloud, no one liked deployment downtime. With applications hosted in traditional data centers that restricted access for local users, many organizations scheduled deployments when users were less likely to be using the applications, like the middle of the night. With widespread adoption of cloud-based, 24x7 environments available from all time zones, every hour of the day, easy-to-find deployment windows are gone.