1. A system to select and migrate relevant data from among data associated with a workload of a virtual machine and stored in a source storage cache memory in a dynamic computing environment, the system comprising: a source virtual machine monitor, executed on a source node, configured to select one or more policies, the one or more policies including a size policy defining a default maximum size for the relevant data, and select the relevant data from among the data based on the one or more policies in a default mode; and a target storage cache memory, implemented on a target node, configured to receive and store the relevant data from the source node, wherein the source virtual machine monitor selects the one or more policies based on a type of the workload, the types of the workload including an operating system and an application such that two operating systems have a same size policy and two applications have a same size policy.