在这里我们定义的“弹性裸金属服务器”是一个“新物种”，它强调的是“弹性”，也就是通过技术创新，使得传统裸金属服务能够做到和虚拟机一致的使用体验和业务敏捷。
所以，“弹性裸金属服务器”应该具备如下八个关键特征：
特征一：分钟级交付
云服务快速弹性伸缩，是IaaS云服务的核心特征。一般来说，虚拟机服务可以做到分钟级业务弹性伸缩。
2017年10月鹿晗关晓彤恋情引发微博瘫痪，此类业务特征是：业务流量瞬时暴涨，需要后台必须具备分钟级业务弹性伸缩能力。此种情况下，弹性裸金属服务器必须能够在分钟级别快速交付，才能应对突如其来的瞬时暴涨业务流量。
特征二：兼容VPC/SLB/RDS等云平台全业务
对于已经上云的客户来说，涉及到保护当前投资等考虑，完全兼容现有云平台业务至关重要。以VPC网络为例，弹性裸金属服务器必须和虚拟机保持100%一致的虚拟化网络接入能力和安全隔离能力。
特征三：兼容虚拟机镜像系统
兼容虚拟机镜像，可以使得弹性物理机和虚拟机之间平缓迁移，提供业务部署弹性。
特征四：云盘启动和数据云盘动态热插拔
云盘启动是弹性物理机的核心特征。如果无法支持云盘启动，则必须依赖传统PXE装机。PXE装机则无法做到分钟级别业务交付，控制台镜像密码修复等关键功能。
数据云盘动态热插拔，是弹性存储服务关键特征，保证客户对存储性能和容量需求能够pay-as-you-go
特征五：和虚拟机一致的VNC、web控制台、openAPI用户体验
保持和虚拟机web H5 VNC，web控制台等方面一致的用户体验，能够极大降低用户的学习成本。保持和虚拟机一致的openAPI接口，才能够保护客户既有资源管理系统的投资。
特征六：宕机迁移恢复
宕机自动迁移恢复，可以极大降低IaaS基础设施故障恢复时间。当虚拟机或者弹性物理机出现软硬件故障时，运维管控系统能够自动迁移实例，最小化降低客户业务中断。
而宕机迁移实现则依赖弹性物理机本地“无状态”，其实现依赖于BIOS配置可迁移、云盘启动、数据云盘等关键技术。
特征七：免人肉自动化运维
传统物理机的部署一般需要3个工作日，此种模式进行极致优化，也需要至少4小时的交付时长。而免人肉自动化运维是IaaS云服务的核心特征。
特征八：物理机的完整特性和性能、以及高隔离性和高安全性
虚拟机同样具备上述七大特征，而弹性裸金属服务器在兼具上述七大优势的同时，必须虚拟机不具备的核心竞争力。
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