Using cloudlets and multipath TCP for seamless virtual machine migration

已经提出了用于移动的云计算（MCC）的基于邻近虚拟机（VM）的微云，以增强实时资源密集型移动的应用的性能。在移动终端（MD）发现附近的微云之后，在从MD到VM的数据卸载开始之前，需要时间来在微云内建立虚拟机（VM）。发现云和实际卸载数据之间的时间被认为是服务启动时间。当在附近的地理位置中呈现多个微云时，利用每个微云发起服务对于改变位置的微云用户来说可能是令人沮丧的。为了消除从源微云移动后由服务启动时间引起的延迟，本研究提出了相邻微云之间的无缝实时VM迁移。无缝的实时VM迁移是通过预先知道目的地Cloudlet中的迁移VM IP地址来实现的，更重要的是通过多路径TCP（MPTCP）来实现的。我们将使用Linux KVM虚拟机管理程序执行大量实验来验证所提出的方法。实验结果将证明所提出的方法的可行性，并显示性能的改善。具体来说，在迁移完成后，目标cloudlet的停机时间为零。

A nearby virtual machine (VM) based cloudlets have been proposed for mobile cloud computing (MCC) to enhance the performance of real-time resource-intensive mobile applications. After a mobile device (MD) discovers a cloudlet in the vicinity, it takes time to set up a virtual machine (VM) inside the cloudlet before data offloading from the MD to the VM starts. The time between discovering the cloudlet and actual offloading of data is considered as a service initiation time. When multiple cloudlets are presented in a nearby geographical location, initiating a service with each cloudlet may be frustrating for cloudlet users when changing location. In order to eliminate the delay caused by the service initiation time after moving away from the source cloudlet, this research is proposing a seamless live VM migration between neighbour cloudlets. A seamless live VM migration is achieved with the prior knowledge of the migrating VM IP address in the destination cloudlet and more importantly with multipath TCP (MPTCP). We will perform a number of experiments to validate the proposed approach using the Linux KVM hypervisor. The experimental results will demonstrate the feasibility of the proposed approach and also show performance improvement. Specifically, there will be zero downtime at the destination cloudlet after the migration is completed.