cloud 云计算学习

定义


colud computing is a model for enabling convenient,
ondemand network access to a shared pool of configurable
computing resources(e.g.,networks,servers,storage,applications,and
services)that can be rapidly provisioned and released with minimal
management effort ofservice provider interzction.


三种服务模式
saas software as a service
paas platform as a service
laas ingrastructure as a service


五个特征：
broad network access
rapid elasticity
measured service
on-demand self-service
resource pooling


四种布署模式
public
private
hybrid
community