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What are the Default VM Schedulers Available in CloudSim?

what-are-the-default-vm-schedulers-available-in-cloudsim

Condition for Default VM Schedulers Available in CloudSim

  • Description:
    In CloudSim, VM Schedulers are responsible for managing how processing elements (PEs) on a host are allocated to VMs.
  • VmSchedulerTimeShared:
    Description: This scheduler allows VMs to share the PEs simultaneously using a time-shared policy. Each VM gets a time slice of the PE, meaning that multiple VMs can use the same PE at the same time, but only a fraction of the MIPS is allocated to each.
    Use Case: Suitable for scenarios where VMs need to share resources dynamically and the workload can tolerate time-sliced execution.
  • VmSchedulerSpaceShared:
    Description: This scheduler allocates PEs in a space-shared manner. Each PE is assigned to only one VM at a time. If there are more VMs than available PEs, the extra VMs must wait until a PE is freed.
    Use Case: Ideal for workloads that require dedicated PEs without resource contention.
  • VmSchedulerCompletelyFair:
    Description: This scheduler ensures a fair allocation of PEs among VMs based on their requested MIPS. It distributes available MIPS among all VMs in a balanced way.
    Use Case: Useful when fairness in resource allocation among VMs is a priority.
  • VmSchedulerTimeSharedOverSubscription:
    Description: Extends the VmSchedulerTimeShared by allowing over-subscription. This means it can allocate more MIPS to VMs than the total available capacity, useful for scenarios where not all VMs use their full requested MIPS simultaneously.
    Use Case: Suitable for over-committing resources in environments where some VMs are under-utilized.