Server Consolidation for Internet Applications in Virtualized Data Centers

摘要

Server consolidation based on virtualization technology simplifies systemadministration and improves energy efficiency by improving resourceutilizations and reducing the physical machine (PM) number in contemporaryservice-oriented data centers. The elasticity of Internet applications changesthe consolidation technologies from addressing virtual machines (VMs) to PMsmapping schemes which must know the VMs statuses, i.e. the number of VMs andthe profiling data of each VM, into providing the application-to-VM-to-PMmapping. In this paper, we study on the consolidation of multiple Internetapplications, minimizing the number of PMs with required performance. We firstmodel the consolidation providing the application-to-VM-to-PM mapping tominimize the number of PMs as an integer linear programming problem, and thenpresent a heuristic algorithm to solve the problem in polynomial time.Extensive experimental results show that our heuristic algorithm consumes lessthan 4.3% more resources than the optimal amounts with few overheads. Existingconsolidation technologies using the input of the VM statuses output by ourheuristic algorithm consume 1.06% more PMs.