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.XenServervSphere
目标用户个人或中小企业中小企业
操作系统虚拟化NoNo
全虚拟化NoYes
x86,x86_64YesYes
FCoE SSD SwapNoYes
USB,SATA,SASmNFS,iSCSIYesNo
DAS,FC,NASYesYes
eSATA,RDMNoNo
Virtual Disk Size2000GB2000GB
GB/vm128 GB1024 GB
vCPUs/vm1632
vNICs710
vDisk/vm1662
vCPUs on HostN/A2048 vCPUs/host
Thin ProvisioningYesYes
Asset managementYesNo
Configuration mappingYesNo
Dynamic Resource AllocationNoYes
FailoverNoYes
Live MigrationNoYes

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