A/B deployment
A/B deployment strategy allows teams to have new application versions running alongside with the old application versions. Since only a fraction of the user traffic requests will be served by the new running application version, this allows the application teams to learn more about how the user is using the newly-released features before they are made available to all the users.
As we discussed in the zero downtime deployment section, we learned that at any given point in time, there can be two application versions accepting user traffic. Before we remove the external route from the old version of the application, we can have both the application versions running side by side for a few days. When the application teams are happy ...
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