Systems and methods for migratable services
First Claim
1. A system for manually migrating a migratable service in a cluster, comprising:
- a server cluster comprising at least two servers;
a migration target comprising a list of servers in said server cluster capable of hosting a migratable service;
a migration manager capable of moving a migratable service between servers in the server cluster, the migration manager ensuring that only one active instance of the service exists in the cluster at any time; and
a service stub capable of serving a user request on the servers in said server cluster, the service stub capable of serving the user request on servers in the migration target until the user request is served on the server hosting the active instance of the migratable service.
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Accused Products
Abstract
A migration framework provides for the migration of services in a cluster. A migratable target contains a list of servers in the cluster capable of hosting a migratable service. A migration manager can migrate the service between servers in the migratable target, and can activate an instance of the service on the selected host server. The migration manager ensures that only one active instance of the service exists in the cluster. A service stub can serve a user request on servers in the migration target, such as by order of preference, until the user request is served on the server hosting the active instance. A lease manager can assign a lease period to determine how long a server hosts an active instance.
This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.
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Citations
58 Claims
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1. A system for manually migrating a migratable service in a cluster, comprising:
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a server cluster comprising at least two servers;
a migration target comprising a list of servers in said server cluster capable of hosting a migratable service;
a migration manager capable of moving a migratable service between servers in the server cluster, the migration manager ensuring that only one active instance of the service exists in the cluster at any time; and
a service stub capable of serving a user request on the servers in said server cluster, the service stub capable of serving the user request on servers in the migration target until the user request is served on the server hosting the active instance of the migratable service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A framework for manually migrating a service between servers, comprising:
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a migration target capable of containing a list of servers capable of hosting a migratable service;
a migration manager capable of activating an instance of a migratable service on one of the servers contained in said migration target, the migration manager further capable of migrating the migratable service to another one of the servers in the migration target and ensuring that only one active instance of the service exists at any time;
a service stub capable of serving a user request on the servers contained in said migration target, the service stub capable of serving the user request on servers in the migration target until the user request is served on the server hosting the active instance of the migratable service; and
a lease manager adapted to assign a lease period to the server hosting the migratable service, the lease period determining how long the server will host the active instance of the migratable service. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 53)
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44. A method for manually migrating a service in a server cluster, comprising:
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deactivating an active service class instance located a server in the server cluster;
selecting a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
activating the service class instance on the new host server. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52)
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54. A computer-readable medium, comprising:
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means for deactivating an active service class instance located on a server in the server cluster;
means for selecting a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
means for activating the service class instance on the new host server.
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55. A computer program product for execution by a server computer for migrating a service in a server cluster, comprising:
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computer code for deactivating an active service class instance located on a server in the server cluster;
computer code for selecting a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
computer code for activating the service class instance on the new host server.
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56. A system for migrating a service in a server cluster, comprising:
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means for deactivating an active service class instance located on a server in the server cluster;
means for selecting a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
means for activating the service class instance on the new host server.
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57. A computer system comprising:
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a processor;
object code executed by said processor, said object code configured to;
deactivate an active service class instance located on a server in the server cluster;
select a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
activate the service class instance on the new host server.
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58. A computer data signal embodied in a transmission medium, comprising:
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a code segment including instructions to deactivate an active service class instance located on a server in the server cluster;
a code segment including instructions to select a new host server in the server cluster to host the active service class instance, the new host server being selected from a migratable target containing a list of all servers in the server cluster capable of hosting an active instance; and
a code segment including instructions to activate the service class instance on the new host server.
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Specification