Elastic service definition in computational clouds

摘要: Cloud computing [1], [2] is rapidly changing the landscape of traditional IT service provisioning. It presents providers with potential to significantly reduce initial capital investment into hardware by removing costs associated deployment and management resources enabling them lease infrastructure on demand from a virtually unlimited pool. This introduces great degree flexibility, permitting pay only for actual used per unit time “pay as you go” basis optimise their whilst improving overall availability scale services. In this manner, need overprovisioning services meet peaks in can be considerably reduced favour driving resource allocations dynamically according application workload. however requires means defining rules which should mechanisms must provided monitor state enforce accordingly. We discuss paper an elastic definition language that are developed context RESERVOIR project facilitate dynamic provisioning clouds. builds Open Virtualisation Format, DMTF standard packaging virtual services, new abstractions support elasticity. addition, we detail functional requirements cloud handle these abstractions.