Yaohui Hu

Learn More
—Virtualization has been widely adopted in recent years in the cloud computing platform to improve server consolidation and reduce operating cost. Virtual Machine (VM) checkpointing refers to the act of saving a persistent snapshot (or checkpoint) of a VM's state at any instant. VM checkpointing can drastically prolong the lifetime and vulnerability of(More)
—Virtual machine (VM) migration is a technique for transferring the execution state of a VM from one physical host to another. While VM Migration is critical for load balancing, consolidation, and server maintenance in virtualized datacenters, it can also increase security risks. During VM migration, an attacker with sufficient privileges can compromise a(More)
Cloud computing platforms routinely use virtualization to improve service availability, resiliency, and flexibility. Live migration of Virtual Machines (VM) is a key technique to quickly migrate workloads in response to events such as impending failure or load changes. Despite extensive research, state-of-the-art live migration approaches take a long time(More)
When considering a hypervisor, cloud providers must balance conflicting requirements for simple, secure code bases with more complex, feature-filled offerings. This paper introduces Dichotomy, a new two-layer cloud architecture in which the roles of the hypervisor are split. The cloud provider runs a lean hyperplexor that has the sole task of multiplexing(More)
Virtual Machines (VMs) have been widely adopted in cloud platforms to improve server consolidation and reduce operating costs. VM checkpointing is used to capture a persistent snapshot of a running VM and to later restore the VM to a previous state. Although VM checkpointing eases system administration, such as in recovering from a VM crash or undoing a(More)
  • 1