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What is Docker Layer Caching?
Docker Layer Caching is a feature of Docker, a popular containerization platform, that enhances the efficiency of building Docker images. When a Docker image is built, it is composed of multiple layers, with each layer representing a filesystem change.
Layer caching works by caching the intermediate layers of an image during the image build process. When Docker builds an image, it executes each instruction in the Dockerfile, creating a new layer for each instruction. If a layer has not changed since the last build, Docker can reuse the cached layer instead of rebuilding it. This significantly speeds up the image build process, especially when changes are made to the Dockerfile or application code.
Layer caching helps reduce the time and resources required to build Docker images, making the development and deployment process more efficient. It is particularly beneficial in Continuous Integration/Continuous Deployment (CI/CD) pipelines where frequent image builds are performed.
When you generate an image based on the Dockerfile, and use the container generated by this image to shorten the…
