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To ensure the reliability of cloud system within the range of user requirements, according to the performance requirements and the current service concurrency, this paper adjusts the VM quantity in operation mode and adjusts the VM quantity in cold and hot backup mode on the basis of meeting the reliability requirement R.
First of all, the parameters need to be initialized. R_¥ä refers to the upper limit of reliability qualification, R_¥å refers to the floor level of reliability qualification; p_¥å refers to the limitation of failure efficiency; k refers to the quantity of VM in operation mode m1; M_o [k] refers to the failure rate matrix at the next moment of VM k in the collection of OM; VM_"cuvo " ={VM_1,VM_2,L,VM_k} represents the collection of the current system in operating mode; VM_"cuve " ={VM_cl,VM_C2,L,VM_"cil " } represents the collection of the current system in hot backup mode. |
IEEE/ICACT20210154 Slide.10
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