edgeLinux OS supports two types of virtualization to create your antlets. While each antlet is a complete Virtual Private Server (VPS), LXC antlets use OS-based virtualization, a.k.a. containerization (popularized by docker), whereas KVM antlets use hardware-based virtualization with QEMU and KVM. For most cases, use LXC-based antlets because they create the least overhead and save resources including electricity. In that way, your Antsle is a green datacenter.