1. A drivetrain, in particular for motor vehicles,
having an internal combustion engine, comprising an output shaft;
having a turbocharger, comprising an exhaust gas turbine, which is situated in the exhaust gas stream of the internal combustion engine, and a compressor, driven by the exhaust gas turbine, which is situated in an air channel leading to the internal combustion engine in order to compress air for the internal combustion engine;
the exhaust gas turbine additionally having a drive connection to an auxiliary system or to the output shaft of the internal combustion engine or being switchable into such a connection, in order to alternately or simultaneously transmit drive power from the exhaust gas turbine to the compressor and the auxiliary system or the output shaft; and
a hydrodynamic clutch being situated in the additionally provided drive connection, comprising a bladed primary wheel and a bladed secondary wheel, which implement a working chamber with one another, which is fillable or filled with a working medium, in order to hydrodynamically transmit drive power from the primary wheel to the secondary wheel, and the primary wheel has a drive connection to the exhaust gas turbine, and the secondary wheel has a drive connection to the auxiliary system or the output shaft;
characterized in that
the hydrodynamic clutch is switched between the exhaust gas turbine and the compressor, in that the primary wheel of the hydrodynamic clutch is mechanically connected to a gearwheel or carries such a gearwheel, in particular on its external circumference, which meshes with a gearwheel revolving with the exhaust gas turbine or a gearwheel revolving with the compressor, so that the primary wheel of the hydrodynamic clutch has a mechanical drive connection to the exhaust gas turbine and the compressor.
2. The drivetrain according to claim 1, characterized in that the primary wheel of the hydrodynamic clutch has the same transmission ratio to the exhaust gas turbine and to the compressor.
3. The drivetrain according to one of claim 2, characterized in that one or more of the following components is driven as the auxiliary system;
a fan wheel, in particular of the motor vehicle cooling system
a pump
an additional compressor, in particular a stroke piston compressor
a compressed air compressor of a motor vehicle compressed air system
an electric generator, which can particularly also be driven by a motor,
an air-conditioning compressor.
4. The drivetrain according to one of claim 2, characterized in that the secondary wheel has a mechanical drive connection to the output shaft.
5. The drivetrain according to one of claim 2, characterized in that the output shaft and the secondary wheel are connected to one another via a gearwheel transmission, in particular cylindrical gearing.
6. The drivetrain according to one of claim 2, characterized in that the exhaust gas turbine is a radial-axial turbine.
7. The drivetrain according to one of claim 2, characterized in that at least one further system, in particular an air compressor of a motor vehicle compressed air system or a coolant water pump, has a drive connection to the exhaust gas turbine or is switchable into such a connection, in order to be driven by the exhaust gas turbine.
8. The drivetrain according to one of claim 2, characterized in that the hydrodynamic clutch can be regulated or controlled in its power transmission, in particular by deliberate variation of the degree of filling of the working chamber with working medium andor by more or less interference of a circulation flow of working medium in the working chamber by introducing a throttle element such as a throttle ring or a throttle disk.
9. The drivetrain according to one of claim 1, characterized in that one or more of the following components is driven as the auxiliary system;
a fan wheel, in particular of the motor vehicle cooling system
a pump
an additional compressor, in particular a stroke piston compressor
a compressed air compressor of a motor vehicle compressed air system
an electric generator, which can particularly also be driven by a motor,
an air-conditioning compressor.
10. The drivetrain according to one of claim 9, characterized in that the secondary wheel has a mechanical drive connection to the output shaft.
11. The drivetrain according to one of claim 9, characterized in that the output shaft and the secondary wheel are connected to one another via a gearwheel transmission, in particular cylindrical gearing.
12. The drivetrain according to one of claim 1, characterized in that the secondary wheel has a mechanical drive connection to the output shaft.
13. The drivetrain according to one of claim 1, characterized in that the output shaft and the secondary wheel are connected to one another via a gearwheel transmission, in particular cylindrical gearing.
14. The drivetrain according to one of claim 1, characterized in that the exhaust gas turbine is a radial-axial turbine.
15. The drivetrain according to one of claim 1, characterized in that at least one further system, in particular an air compressor of a motor vehicle compressed air system or a coolant water pump, has a drive connection to the exhaust gas turbine or is switchable into such a connection, in order to be driven by the exhaust gas turbine.
16. The drivetrain according to one of claim 1, characterized in that the hydrodynamic clutch can be regulated or controlled in its power transmission, in particular by deliberate variation of the degree of filling of the working chamber with working medium andor by more or less interference of a circulation flow of working medium in the working chamber by introducing a throttle element such as a throttle ring or a throttle disk.
17. The drivetrain according to claim 16, characterized in that a control unit is provided, which is interconnected with the hydrodynamic clutch, in order to automatically control or regulate the power transmission using the hydrodynamic clutch.
18. The drivetrain according to claim 17, characterized in that the control unit is set up in order to, by controlling or regulating the hydrodynamic power transmission in the hydrodynamic clutch, to allocate the drive power transmitted from the exhaust gas turbine to the primary wheel deliberately via the secondary wheel to the output shall and mechanically to the compressor.
19. The drivetrain according to one of claim 17, characterized in that the control unit is set up, in order to, by controlling or regulating the hydrodynamic power transmission in the hydrodynamic clutch in predetermined operating states having a relatively small exhaust gas stream, to transmit drive power from the output shaft via the hydrodynamic clutch to the compressor.
20. The drivetrain according to one of claim 18, characterized in that the control unit is set up, in order to, by controlling or regulating the hydrodynamic power transmission in the hydrodynamic clutch in predetermined operating states having a relatively small exhaust gas stream, to transmit drive power from the output shaft via the hydrodynamic clutch to the compressor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for process migration in a data center network, comprising:
selecting processes to be migrated from a plurality of overloaded servers within a data center network based on an overload status of each overloaded server;
selecting, for each selected process, one of a plurality of underloaded servers to which to migrate the selected process based on an underload status of each underloaded server, and based on a parameter of a network component by which the selected process is to be migrated; and
migrating each selected process to the selected underloaded server such that a migration finishes within a specified budget.
2. The method of claim 1, wherein the overload status comprises an excess capacity of a selected overloaded server, and wherein the underload status comprises a free capacity of a selected underloaded server.
3. The method of claim 1, comprising selecting the processes to be migrated such that a maximum number of overloaded servers are relieved.
4. The method of claim 1, comprising determining an order of migrating the processes by prioritizing the processes based on an application to which each process belongs.
5. The method of claim 1, wherein selecting one of the plurality of underloaded servers to which to migrate a selected process comprises selecting one or more of the underloaded servers within a specified network proximity to an overloaded server hosting the selected process.
6. The method of claim 1, wherein the parameter of the network component comprises a capacity of a network link.
7. The method of claim 1, wherein the specified budget comprises a temporal budget, a bandwidth budget, a specified total number of processes for migration, a specified maximum number of processes that can be migrated from each overloaded server, or a specified maximum number of processes that can be migrated to each underloaded server, or any combinations thereof.
8. The method of claim 1, wherein the processes to be migrated and the plurality of underloaded servers to which to migrate the processes are selected simultaneously.
9. A system for process migration, comprising:
a data center network comprising a plurality of servers, wherein the plurality of servers comprises overloaded servers and underloaded servers; and
a client computing device communicatively coupled to the data center network, wherein the client computing device comprises:
a processor that is adapted to execute stored instructions; and
a system memory, wherein the system memory comprises code configured to:
select processes to be migrated from one of the overloaded servers based on an overload status of each overloaded server; and
select, for each selected process, an underloaded server to which to migrate the process based on an underload status of each underloaded server, and based on available resources and constraints in the data center network;
wherein the data center network is configured to migrate each selected process to the selected underloaded server in response to an input from the client computing device.
10. The system of claim 9, wherein the available resources in the data center network comprise capacities for network links by which the selected processes are to be migrated.
11. The system of claim 9, wherein the overload status comprises an excess capacity of a selected overloaded server, and wherein the underload status comprises a free capacity of a selected underloaded server.
12. The system of claim 9, wherein the processes comprise virtual machines.
13. The system of claim 9, wherein the data center network is configured to migrate a local state or a persistent state, or both, of a selected process to a selected underloaded server.
14. The system of claim 9, wherein the data center network is configured to migrate a local state of a selected process to a selected underloaded server, and wherein the selected underloaded server is configured to access a storage system of the data center network to obtain a persistent state of the process.
15. The system of claim 9, wherein the constraints comprise network distances and parameters between each of the underloaded servers and an overloaded server comprising a selected process.
16. One or more non-transitory, computer-readable storage media for storing computer-readable instructions, the computer-readable instructions providing a system for migrating processes when executed by one or more processing devices, the computer-readable instructions comprising code configured to:
select a process to be migrated from an overloaded server within a data center network, wherein the overloaded server is chosen from a plurality of overloaded servers based on an excess capacity of the overloaded server;
select an underloaded server within the data center network to which to migrate the selected process, wherein the underloaded server is chosen from a plurality of underloaded servers based on a free capacity of the underloaded server and a network distance between the underloaded server and the overloaded server; and
migrate the selected process from the overloaded server to the underloaded server.
17. The one or more non-transitory, computer-readable storage media of claim 16, wherein the computer-readable instructions comprise code configured to migrate each of a plurality of selected processes from any of the plurality of overloaded machines to any of the plurality of underloaded servers within a specified budget.
18. The one or more non-transitory, computer-readable storage media of claim 16, wherein the network distance between the underloaded server and the overloaded server is less than or equal to a specified network distance.
19. The one or more non-transitory, computer-readable storage media of claim 18, wherein the process to be migrated and the underloaded server to which to migrate the process are selected simultaneously.
20. The one or more non-transitory, computer-readable storage media of claim 16, wherein the computer-readable instructions comprise code configured to:
select a plurality of processes to be migrated from any of a plurality of overloaded server within the data center network;
select one or more underloaded servers within the data center network to which to migrate the plurality of selected processes; and
migrate the plurality of selected processes from the overloaded servers to the selected underloaded servers.