虚拟化常见问题
KVM vs Vmware#
XenServer vs VMware vSphere#
- Citrix Xenserver Vs Vmware vSphere
- VMware vSphere
- 120 VM/Host
- 2048 GB, 2048 vdisk/Host
- 160 CPU/Host
- 2048 vCPU/Host
- XenServer
- 75 VM/Host
- 1024 GB, 512 vdisk/Host
- 160 CPU/Host
- 不支持
- Dynamic Resource Allocation
- Failover
- Live Migration
| vs. | XenServer | vSphere |
|---|---|---|
| 目标用户 | 个人或中小企业 | 中小企业 |
| 操作系统虚拟化 | No | No |
| 全虚拟化 | No | Yes |
| x86,x86_64 | Yes | Yes |
| FCoE SSD Swap | No | Yes |
| USB,SATA,SASmNFS,iSCSI | Yes | No |
| DAS,FC,NAS | Yes | Yes |
| eSATA,RDM | No | No |
| Virtual Disk Size | 2000GB | 2000GB |
| GB/vm | 128 GB | 1024 GB |
| vCPUs/vm | 16 | 32 |
| vNICs | 7 | 10 |
| vDisk/vm | 16 | 62 |
| vCPUs on Host | N/A | 2048 vCPUs/host |
| Thin Provisioning | Yes | Yes |
| Asset management | Yes | No |
| Configuration mapping | Yes | No |
| Dynamic Resource Allocation | No | Yes |
| Failover | No | Yes |
| Live Migration | No | Yes |
VNC vs SPICE#
- VNC
- 读取显存查分压缩发送到客户端
- RFB 协议
- SPICE
- 模拟 X11 驱动，捕获 X 协议和操作
- QXL 协议
- 参考