Patent ID: 7072913
Filing Date: 2006-07-04
Classification: G06F,Y10S

Abstract:
1. A method for executing a hot migrate operation from a first version of a service using a first data model, to a second version of the service using a second data model that is modified with respect to the first data model, the service comprising a client application, a data manager and a data repository, said method comprising the steps of: installing at least one second version client application; installing a second version data manager operating according to the second data model; and installing a second version data repository arranged according to the second data model and cooperating with the second version data manager, wherein the second version data manager is provided with a first migration plug-in and in that an incremental roll-over process is effectuated, wherein in successive steps, data is converted from a first version data repository associated with the first version of the service to said second version data repository by the first migration plug-in until all data are converted and thereafter, a first version client application associated with the first version of the service becomes removable, and wherein the first version of the service is controlled to retrieve data from the first version data repository, but if unsuccessful, to retrieve and convert data from the second version data repository without storing the data in the first version data repository, where said conversion takes place using a second migration plug-in coupled to a first data manager associated with the first version of the service.