Package org.cloudbus.cloudsim.datacenters

Interface Datacenter

  • All Superinterfaces:
    java.lang.Cloneable, java.lang.Comparable<SimEntity>, Identifiable, Nameable, PowerAware, java.lang.Runnable, SimEntity
    All Known Implementing Classes:
    DatacenterSimple, NetworkDatacenter
    public interface Datacenter
extends SimEntity, PowerAware
    An interface to be implemented by each class that provides Datacenter features. The interface implements the Null Object Design Pattern in order to start avoiding NullPointerException when using the NULL object instead of attributing null to Datacenter variables.
    Since:
    CloudSim Plus 1.0
    Author:
    Rodrigo N. Calheiros, Anton Beloglazov, Manoel Campos da Silva Filho

    • Method Detail

      • getHostList

        <T extends Host> java.util.List<T> getHostList()
        Gets an unmodifiable host list.
        Type Parameters:
        T - The generic type
        Returns:
        the host list

      • getHost

        Host getHost​(int index)
        Gets a Host in a given position inside the Host List.
        Parameters:
        index - the position of the List to get the Host
        Returns:

      • getHostById

        Host getHostById​(long id)
        Gets a Host from its id.
        Parameters:
        id - the ID of the Host to get from the List.
        Returns:
        the Host if found or Host.NULL otherwise

      • addHostList

        <T extends Host> Datacenter addHostList​(java.util.List<T> hostList)
        Physically expands the Datacenter by adding a List of new Hosts (physical machines) to it. Hosts can be added before or after the simulation has started. If a Host is added during simulation execution, in case VMs are added dynamically too, they may be allocated to this new Host, depending on the VmAllocationPolicy.

        If an ID is not assigned to a Host, the method assigns one.

        Parameters:
        hostList - the List of new hosts to be added
        Returns:
        See Also:
        getVmAllocationPolicy()

      • addHost

        <T extends Host> Datacenter addHost​(T host)
        Physically expands the Datacenter by adding a new Host (physical machine) to it. Hosts can be added before or after the simulation has started. If a Host is added during simulation execution, in case VMs are added dynamically too, they may be allocated to this new Host, depending on the VmAllocationPolicy.

        If an ID is not assigned to the given Host, the method assigns one.

        Parameters:
        host - the new host to be added
        Returns:
        See Also:
        getVmAllocationPolicy()

      • removeHost

        <T extends Host> Datacenter removeHost​(T host)
        Removes a Host from its Datacenter.
        Parameters:
        host - the new host to be removed from its assigned Datacenter
        Returns:

      • getVmAllocationPolicy

        VmAllocationPolicy getVmAllocationPolicy()
        Gets the policy to be used by the Datacenter to allocate VMs into hosts.
        Returns:
        the VM allocation policy
        See Also:
        VmAllocationPolicy

      • getSchedulingInterval

        double getSchedulingInterval()
        Gets the scheduling interval to process each event received by the Datacenter (in seconds). This value defines the interval in which processing of Cloudlets will be updated. The interval doesn't affect the processing of such cloudlets, it only defines in which interval the processing will be updated. For instance, if it is set a interval of 10 seconds, the processing of cloudlets will be updated at every 10 seconds. By this way, trying to get the amount of instructions the cloudlet has executed after 5 seconds, by means of Cloudlet.getFinishedLengthSoFar(Datacenter), it will not return an updated value. By this way, one should set the scheduling interval to 5 to get an updated result. As longer is the interval, faster will be the simulation execution.
        Returns:
        the scheduling interval (in seconds)

      • setSchedulingInterval

        Datacenter setSchedulingInterval​(double schedulingInterval)
        Sets the scheduling delay to process each event received by the Datacenter (in seconds).
        Parameters:
        schedulingInterval - the new scheduling interval (in seconds)
        Returns:
        See Also:
        getSchedulingInterval()

      • getCharacteristics

        DatacenterCharacteristics getCharacteristics()
        Gets the Datacenter characteristics.
        Returns:
        the Datacenter characteristics

      • getDatacenterStorage

        DatacenterStorage getDatacenterStorage()
        Gets the storage of the Datacenter.
        Returns:
        the storage

      • setDatacenterStorage

        void setDatacenterStorage​(DatacenterStorage datacenterStorage)
        Sets the storage of the Datacenter.
        Parameters:
        datacenterStorage - the new storage

      • getBandwidthPercentForMigration

        double getBandwidthPercentForMigration()
        Gets the percentage of the bandwidth allocated to a Host to migrate VMs. It's a value between [0 and 1] (where 1 is 100%). The default value is 0.5, meaning only 50% of the bandwidth will be allowed for migration, while the remaining will be used for VM services.
        Returns:
        See Also:
        DEF_BW_PERCENT_FOR_MIGRATION

      • setBandwidthPercentForMigration

        void setBandwidthPercentForMigration​(double bandwidthPercentForMigration)
        Sets the percentage of the bandwidth allocated to a Host to migrate VMs. It's a value between [0 and 1] (where 1 is 100%). The default value is 0.5, meaning only 50% of the bandwidth will be allowed for migration, while the remaining will be used for VM services.
        Parameters:
        bandwidthPercentForMigration - the bandwidth migration percentage to set

      • addOnHostAvailableListener

        Datacenter addOnHostAvailableListener​(EventListener<HostEventInfo> listener)
        Adds a EventListener object that will be notified every time when the a new Hosts is available for the Datacenter during simulation runtime. If the addHost(Host) or addHostList(List) is called before the simulation starts, the listeners will not be notified.
        Parameters:
        listener - the event listener to add
        Returns: