applications are single-zoned and all instances of the application live in a single availability zone.only allows immediate traffic migration.allows you to choose to route requests to the target version, either immediately or gradually.Instances are health-checked, that will be used by the load balancer to determine whether or not to send traffic to an instance and whether or not it should be autohealed.
does not use health checks to determine whether or not to send traffic to an instance.must have at least one instance running for each active version and can take longer to scale up in response to traffic.uses a custom-designed autoscaling algorithm.Rapid scaling and Zero downscaling is possible, can scale from zero instances up to thousands very quickly.GCP recommends using the Google Cloud client libraries, which make the application more portable.application can accesses services such as Datastore via the built-in google.appengine APIs.Allows selection of any Compute Engine machine type for instances so that the application has access to more memory and CPU.
CLOUDAPP VS CODE
As Flexible environment supports docker it can support custom runtime or source code written in other programming languages.Application instances run within Docker containers on Compute Engine virtual machines (VM).Background threads (limited capability).limits the CPU and memory options available to the application.only allows the app to use a limited set of binary libraries.Sandbox restricts what the application can do.Application instances that run in a sandbox, using the runtime environment of a supported language only.GCP Certification Exam Practice Questions Google Cloud – App Engine Standard vs Flexible Environment Application Execution
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