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Hence, CloudSim supports simulation scenarios that assign specific CPU cores to specific VMs (a space-shared policy), dynamically distribute the capacity of a core among VMs (time-shared policy), or assign cores to VMs on demand.
In the next section, the finer-level details related to the time- shared and space-shared policies are described.
Figure 4(a) presents a provisioning scenario, where the space-shared policy is applied to both VMs and task units.
By using a space-shared policy, the estimated finish time of a task p managed by a VM i is given by
In Figure 4(b), a space-shared policy is applied for allocating VMs to hosts and a time-shared policy forms the basis for allocating task units to processing core within a VM.
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