Method, system and computer program for executing hot migrate operation using migration plug-ins
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United States of America Patent
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Jul 4, 2006
Grant Date -
Dec 12, 2002
app pub date -
Jun 11, 2002
filing date -
Jun 11, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method, system and computer program for executing a hot migration operation are provided. A hot migration operation is executed 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 said first data model. A service comprises a client application, a data manager and a data repository. The migrate operation is effected on a server facility that accommodates multiple processes to be running in parallel. Second version client applications, a second version data manager operating according to the second data model, and a second version data repository arranged according to the second data model and cooperating with the second version data manager are installed. The first and the second version data managers are provided each with a migration plug-in. The method uses an incremental roll-over process, wherein, in successive steps, data is converted from the first version data repository to the second version data repository by the migration plug-in until all data are converted and thereafter, any old version of the service is removed.
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