CoreOS is considered by some observers to be a fork of Google's Chrome OS system, customized for Linux server management. The system is so small because container workloads contain part of the Linux operating system themselves, the user-space parts needed by the application. But all kernel functions, such as scheduling processes and memory management, are the function of the host system and shared by whatever number of containers is running on the host. Containers also leave each workload isolated from the others in a manner that's sometimes described as "lightweight virtualization."
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