SageShift: Managing SLAs for highly consolidated cloud

– Maximizing consolidation ratio, the number of virtual machines (VMs) in a physical machine, without violating customers’ SLAs is an important goal in the cloud. We show that it is difficult to achieve this goal with existing hypervisor schedulers. The schedulers control only the amount of resource allocation, but not the sequence of VM execution. This sequence can significantly impact the response time when requests arrive concurrently for the VMs sharing the same CPU. We find that the response time can increase as much as 100% for every additional VM in the system, even if the utilization does not exceed the maximum capacity. Therefore, existing schedulers have to reduce the consolidation ratio to meet SLAs. Previous resource-provisioning works rely on existing schedulers that cannot guarantee SLAs without reducing the consolidation ratio. We propose SageShift, a system that can achieve SLAs without penalizing the consolidation ratio. SageShift consists of a VM admission control...

• Type: Journal
• Year: 2012
• Where: INFOCOM
• Authors: Orathai Sukwong, Akkarit Sangpetch, Hyong S. Kim
• Keywords: Admission Control, Communications, Dynamic Adjustment, Hypervisor, INFOCOM 2012