October 2019
Intermediate to advanced
520 pages
13h 5m
English
First, we need to understand that each project can host only one App Engine application.
The application can have multiple services with multiple versions, as shown in the following diagram:

Which version is served to the end user is based on the network traffic configuration. We decide on the percentage of traffic that should be directed to a particular version. This means that it is very easy to make new rollouts and possibly even rollbacks.
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