| 摘要 |
A method, in a virtualised system, for balancing a load across multiple virtual machines instantiated over physical hardware of the system, comprising vertically scaling the capacity of respective ones of the VMs up to a physical capacity limit, L PHY , from an initially allocated physical capacity, L VIRT , by providing access to additional resources of the physical hardware in response to an increased load causing the or each VM to reach or exceed a threshold capacity L T1 , and horizontally scaling the capacity of the system by supplementing the multiple VMs with an additional VM instantiated using a hypervisor of the system when a predefined proportion, U 1 , of the VMs have a capacity L PH1 . |
