System and method for process migration in a content centric network
One embodiment provides a system that facilitates a migration of a data model from a source device to a target device. During operation, the system generates, by a target device, a first interest for a first manifest which represents a version of the data model, wherein a manifest indicates a phase of the migration and a plurality of resources with corresponding names. The system transmits a first plurality of interests for the resources indicated in the first manifest based on a corresponding name. The system receives a second manifest, wherein the migration phase indicated in the second manifest is a stop-and-copy phase. The system transmits a second plurality of interests for the resources indicated in the second manifest based on a corresponding name. The system starts the data model on the system based on content objects retrieved in response to the first and second plurality of interests.
1. A computer system for facilitating a migration of a data model indicating resources, the system comprising:
a processor; and
a storage device storing instructions that when executed by the processor cause the processor to perform a method, the method comprising:
generating a first interest for a first manifest which represents a version of the data model, wherein a manifest indicates a phase of the migration and a plurality of resources with corresponding names;
in response to receiving the first manifest, transmitting a first plurality of interests for the resources indicated in the first manifest based on a name for a respective resource indicated in the first manifest;
receiving a second manifest, wherein the migration phase indicated in the second manifest is a stop-and-copy phase;
transmitting a second plurality of interests for the resources indicated in the second manifest based on a name for a respective resource indicated in the second manifest; and
starting the data model on the system based on content objects retrieved in response to the first and second plurality of interests,
thereby facilitating the migration of the data model over a content centric network from a source device to the system.
2. The computer system of claim 1 , wherein generating the first interest, receiving the first manifest, and transmitting the first plurality of interests are in response to determining a pre-copy method for the migration of the data model, and
wherein receiving the second manifest is in response to retrieving content indicated in the first manifest and one or more checkpoint manifests.
3. The computer system of claim 2 , wherein a respective checkpoint manifest indicates a unique version identifier for the data model,
wherein the migration phase indicated in the first manifest and a respective checkpoint manifest is a push phase, and
wherein the second manifest represents a hot version of the data model.
4. The computer system of claim 1 , wherein the data model comprises an architecture for a virtual machine, and wherein the resources are resources of the virtual machine.
5. The computer system of claim 1 , wherein a name is a hierarchically structured variable length identifier that includes contiguous name components ordered from a most general level to a most specific level,
wherein the name for a respective resource indicated in a manifest is a hash-based name which includes a hash value for data representing the respective resource, and
wherein the hash-based name for the respective resource allows the system to obtain the respective resource from any device that stores a content object with a hash value that matches the hash value included in the hash-based name,
thereby facilitating de-duplication of data in the data model.
6. The computer system of claim 1 , wherein receiving the second manifest is further in response to the source device determining that a predetermined marginal threshold is reached and freezing the data model on the source device.
7. The computer system of claim 1 , wherein the method further comprises:
receiving a third manifest which represents a final version of the data model, wherein the migration phase indicated in the third manifest is a pull phase; and
transmitting a third plurality of interests for the resources indicated in the third manifest based on a name for a respective resource indicated in the third manifest, wherein transmitting the third plurality of interests is based on a policy of the system.
8. The computer system of claim 1 , wherein the method further comprises:
transmitting a first interest which is a close checkpoint message with a name that indicates a respective manifest;
in response to receiving an acknowledgment of the first interest, transmitting a second interest which is a confirm checkpoint close message with a name that indicates the respective manifest; and
receiving an acknowledgment of the second interest, wherein the source device releases the resources indicated in the respective manifest.
9. A computer system for facilitating a migration of a data model indicating resources, the system comprising:
a processor; and
a storage device storing instructions that when executed by the processor cause the processor to perform a method, the method comprising:
generating a first manifest which represents a version of the data model, wherein a manifest indicates a phase of the migration and a plurality of resources with corresponding names;
in response to receiving a first plurality of interests for the resources indicated in the first manifest based on a name for a respective resource indicated in the first manifest, transmitting a first plurality of corresponding content objects;
in response to reaching a predetermined threshold:
freezing the data model on the system; and
generating a second manifest, wherein the migration phase indicated in the second manifest is a stop-and-copy phase; and
in response to receiving a second plurality of interests for the resources indicated in the second manifest based on a name for a respective resource indicated in the second manifest, transmitting a second plurality of corresponding content objects,
thereby facilitating the migration of the data model over a content centric network from the system to a target device.
10. The computer system of claim 9 , wherein generating the first manifest, receiving the first plurality of interests, and transmitting the first plurality of content objects are in response to determining a pre-copy method for the migration of the data model, and
wherein the migration phase indicated in the first manifest is a push phase.
11. The computer system of claim 9 , wherein the data model comprises an architecture for a virtual machine, and wherein the resources are resources of the virtual machine.
12. The computer system of claim 9 , wherein a name is a hierarchically structured variable length identifier that includes contiguous name components ordered from a most general level to a most specific level,
wherein the name for a respective resource indicated in a manifest is a hash-based name which includes a hash value for data representing the respective resource, and
wherein the hash-based name for the respective resource allows the target device to obtain the respective resource from any device that stores a content object with a hash value that matches the hash value included in the hash-based name,
thereby facilitating de-duplication of data in the data model.
13. The computer system of claim 9 , wherein the method further comprises:
generating one or more checkpoint manifests, wherein a respective checkpoint manifest indicates a unique version identifier for the data model, wherein the migration phase indicated in the respective checkpoint manifest is a push phase, and
wherein the second manifest represents a hot version of the data model.
14. The computer system of claim 9 , wherein the method further comprises:
generating a third manifest which represents a final version of the data model, wherein the migration phase of the third manifest indicates a pull phase; and
in response to receiving a third plurality of interests for the resources indicated in the third manifest based on a name for a respective resource indicated in the third manifest, transmitting a third plurality of corresponding content objects.
15. The computer system of claim 9 , wherein the method further comprises:
in response to receiving a first interest which is a close checkpoint message with a name that indicates a respective manifest, transmitting an acknowledgment of the first interest; and
in response to receiving a second interest which is a confirm checkpoint close message with a name that indicates the respective manifest:
transmitting an acknowledgment of the second interest; and
releasing the resources indicated in the respective manifest.
16. A computer-implemented method for facilitating a migration of a data model indicating resources, the method comprising:
generating, by a target device, a first interest for a first manifest which represents a version of the data model, wherein a manifest indicates a phase of the migration and a plurality of resources with corresponding names;
in response to receiving the first manifest, transmitting a first plurality of interests for the resources indicated in the first manifest based on a name for a respective resource indicated in the first manifest;
receiving a second manifest, wherein the migration phase indicated in the second manifest is a stop-and-copy phase;
transmitting a second plurality of interests for the resources indicated in the second manifest based on a name for a respective resource indicated in the second manifest; and
starting the data model on the system based on content objects retrieved in response to the first and second plurality of interests,
thereby facilitating the migration of the data model over a content centric network from a source device to the target device.
17. The method of claim 16 , wherein generating the first interest, receiving the first manifest, and transmitting the first plurality of interests are in response to determining a pre-copy method for the migration of the data model,
wherein the migration phase indicated in the first manifest is a push phase,
wherein receiving the second manifest is in response to retrieving content indicated in one or more checkpoint manifests,
wherein a respective checkpoint manifest indicates a unique version identifier for the data model, wherein the migration phase indicated in the respective checkpoint manifest is a push phase, and
wherein the second manifest represents a hot version of the data model.
18. The method of claim 16 , wherein the data model comprises an architecture for a virtual machine, and wherein the resources are resources of the virtual machine.
19. The method of claim 16 , wherein a name is a hierarchically structured variable length identifier that includes contiguous name components ordered from a most general level to a most specific level,
wherein the name for a respective resource indicated in a manifest is a hash-based name which includes a hash value for data representing the respective resource, and
wherein the hash-based name for the respective resource allows the system to obtain the respective resource from any device that stores a content object with a hash value that matches the hash value included in the hash-based name,
thereby facilitating de-duplication of data in the data model.
20. The method of claim 16 , further comprising:
receiving a third manifest which represents a final version of the data model, wherein the migration phase indicated in the third manifest is a pull phase; and
transmitting a third plurality of interests for the resources indicated in the third manifest based on a name for a respective resource indicated in the third manifest, wherein transmitting the third plurality of interests is based on a policy of the target device.