High-performance, scalable and secure virtualization system based on the Xen hypervisor, with monitoring and backup.
Xen is an open-source hypervisor widely used in commercial, academic, and cloud environments to build reliable virtualization platforms. Xen-based virtualization servers deliver high performance and strong security, and provide extensive capabilities for scaling, monitoring, and backup — features that make them especially suitable for enterprise deployments.
A Xen-based virtualization server can be applied in various scenarios: consolidating homogeneous virtual machines on a physical host, building private clouds, and protecting and isolating mission-critical applications.
A key architectural feature of Xen is domain separation. The primary domain — Domain 0 (Dom0) — is a privileged virtual machine with direct access to hardware and responsibility for managing the remaining unprivileged domains (DomU). Dom0 handles DomU lifecycle operations (start/stop/configuration) and services network and disk I/O for guest domains.
In the example architecture, each physical server hosts specific groups of virtual machines. Virtual machines are allocated to hosts by role: communications and web services, storage and terminal access, accounting software with high resource requirements. This separation simplifies resource and performance control, since failures or peak load on one physical server do not impact the others.
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