Docker vs VM: Understanding the Key Differences

In the video "Docker vs VM: What's the Difference, and Why You Care!", Dave Plummer, a retired operating systems engineer from Microsoft, explains the fundamental differences between Docker containers and virtual machines. He compares their key features and explains why they matter. Virtual machines run a complete dedicated operating system, while containers run side by side on the existing operating system, sharing resources. He details the differences in setup, resource usage, and speed, and discusses the use cases for each technology. Additionally, he delves into the underlying technologies that make containers possible, such as cgroups and namespaces in the Linux kernel. Dave concludes by emphasizing that the choice between a container and a virtual machine depends on the specific needs for isolation, portability, and control over the operating system.