Systems and methods for migratable services

A framework for manually migrating a service between servers, comprising:

• 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.

A method for manually migrating a service in a server cluster, comprising:

• 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.

A computer-readable medium, comprising:

• 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.

A computer program product for execution by a server computer for migrating a service in a server cluster, comprising:

• 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.

A system for migrating a service in a server cluster, comprising:

• 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.

A computer system comprising:

• 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.

A computer data signal embodied in a transmission medium, comprising:

• 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.