OVM Concept: dom0 domU_domu dom0-优快云博客

本文链接：https://blog.youkuaiyun.com/zhajianc/article/details/48435483

本文介绍了OVM在x86及SPARC服务器上的管理域概念。对于x86平台，dom0作为管理域运行轻量级Linux内核，并提供硬件资源视图给hypervisor；domU则为无特权的客操作系统管理域。而在SPARC平台上，主要服务域运行Oracle Solaris内核，负责创建和管理其他所有域。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Dom0 is the management domain of OVM

On X86 servers, dom0 kernel is actually a small-footprint Linux kernel with support for a broad array of devices, file systems, and software RAID and volume management. and it is tasked with providing a view of the system hardware available to the hypervisor. and it also allows you to interact directly with the hypervisor to control access to resources as well as performing various tasks such as creating, destroying and controlling guest operating systems, and presenting those guests with a set of common virtual hardware. Dom0 only provides a means to administer the hypervisor.

On SPARC-based servers, the management domain, usually referred to as the primary service domain or control domain, is created when the logical domains manager is installed. If installed on an existing server that is not already configured for logical domains, the current Operating System automatically gets promoted to primary domain status. The primary domain runs an Oracle Solaris kernel and is responsible for the creation and management of all other domains. It is also responsible for providing access to virtualized hardware resources.

On x86 servers, domU is the guest operating systems's management domain. DomUs are unprivileged domains with no direct access to the hardware or device drivers. Each domU is started alongside dom0.