If you plan to use Ubuntu or in fact, the eucalyptus packages, take into account that by default they now have moved from Xen to KVM. KVM requires your machines to support hardware assisted virtualization (Intel VT or AMD-V), so check first your processor capabilities before going with KVM. If you prefer/require Xen, I would suggest to move to Debian Lenny + eucalyptus compiled from source. AFAIK, OpenVZ is not supported by eucalyptus by default.
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如果您计划使用 Ubuntu 或者实际上是 eucalyptus 软件包，请考虑到默认情况下它们现在已从 Xen 迁移到 KVM。 KVM 要求您的计算机支持硬件辅助虚拟化（Intel VT 或 AMD-V），因此在使用 KVM 之前首先检查您的处理器功能。如果您更喜欢/需要 Xen，我建议转向从源代码编译的 Debian Lenny + eucalyptus。 AFAIK，桉树默认不支持 OpenVZ。
If you plan to use Ubuntu or in fact, the eucalyptus packages, take into account that by default they now have moved from Xen to KVM. KVM requires your machines to support hardware assisted virtualization (Intel VT or AMD-V), so check first your processor capabilities before going with KVM. If you prefer/require Xen, I would suggest to move to Debian Lenny + eucalyptus compiled from source. AFAIK, OpenVZ is not supported by eucalyptus by default.