宿主機爲24核cpu,64G內存,上面運行3臺guest,由於業務的不肯定性,不能提早肯定多大性能服務器可以支持,因此開機爲最小配置:4核 8G,之後隨着業務增加動態調整CPU和內存centos
cat centos1服務器
name = "centos1"ide
vcpus = 4性能
maxvcpus = 10spa
memory = 8192rest
maxmem = 24576內存
disk = [ "file:/var/xen/centos1.qcow2,"phy:/dev/sdc,xvdc,w"]it
vif = [ "bridge=br0","bridge=br1" ]class
on_reboot = "restart"配置
on_crash = "destroy"
修改內存:
xm mem-set centos1 16384 #調整centos1的內存爲16G
xm mem-set centos1 24576 #調整centos1的內存爲20G
修改cpu:
xm vcpu-list #查看cpu的使用
xm vcpu-set centos1 6 #修改centos1的cpu顆數
xm top #查看當前各主機的狀態
快照,作快照須要關機
xm save centos1 centos1.save
xm shutdown centos1
xm restore centos1.save