第八部分
配置管理drs(动态资源分配)
drs的介绍
vsphere drs(distributed resource scheduler) is a feature of vcenter server on the properties of a cluster that balances a load across multiple esxi hosts.it has the following two main functions;(分布式资源调度,能够n在多个esxi主机之间实现负载均衡)
to decide which node of a cluster should run a vm when it's powered on,a function often referred to as intelligent placement(vm开机后,判断那台esxi主机负载少,使用那台esxi主机)
to evaluate the load on the cluster over time and either make recommendations for migrations or use vmotion to automatically move vms to create a more balanced cluster workload.(通过vmotion自动迁移vm达到资源平衡)
在cluster上开启drs
drs的三种自动化级别
1.手动(开机的部署,在线迁移都是手动操作)
2.半自动(开机的部署需要手动操作,在线迁移自动完成)
3.全自动(开机的部署,在线迁移都是自动完成)
