UTwinVM: Reliable hints on the effects of hypervisor updates on VMs in the Cloud

We investigate the problem of getting hints on the effects of virtualization system (aka hypervisor) updates impact on virtual machines (VMs). System administrators can be reluctant to apply updates due to vague hints regarding the updates' impact on running applications. The problem is challenging since VMs are black boxes by design, reducing the scope of the data that can be retrieved and analyzed. Additionally, cloning VMs is only sometimes possible for obvious legal and privacy concerns.