The bigger your container image, the longer this takes, despite the fact that most applications don’t actually need every byte of data in the container image to start booting (and some data in the container may even never be used). The way Kubernetes traditionally works when scaling up your application is that the entire container image must be downloaded onto the node before the application can boot. We achieve this by reducing the image pull-time for your container from several minutes (in the case of large images) to a couple of seconds (irrespective of container size), and allowing your application to start booting immediately while GKE streams the container data in parallel. This revolutionary GKE feature has the potential to drastically improve your application scale-up time, allowing you to respond to increased user demand more rapidly, and save money by provisioning less spare capacity. We’re excited to announce the general availability of a new feature in Google Kubernetes Engine (GKE): image streaming.
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