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QEMU is one of the core building blocks for many of the KVM-based data center virtualization and infrastructure projects (e.g. OpenStack, oVirt, KubeVirt, etc).
by kashyapc 8y ago
QEMU is one of the core building blocks for many of the KVM-based data center virtualization and infrastructure projects (e.g. OpenStack, oVirt, KubeVirt, etc). And is used by a wide variety of other projects for various use cases (e.g. `systemd` upstream uses QEMU to speed-up development/testing).
When you launch a KVM-based guest, most often you would see QEMU doing the major user space heavy-lifting by providing a PC-like environment—it handles guest memory management, network cards, emulated storage devices, and so forth. QEMU also has a robust Block Layer; not to mention its versatile, and widely-used, native disk image format, QCOW2.
PS: I am biased, as I work with QEMU on a daily basis :-)