Data processing: database and file management or data structures – File or database maintenance – Synchronization
Reexamination Certificate
2011-08-23
2011-08-23
Corrielus, Jean M (Department: 2162)
Data processing: database and file management or data structures
File or database maintenance
Synchronization
C707S625000, C707S637000, C707S638000, C707S639000, C717S168000, C717S174000, C709S217000, C709S223000, C709S203000
Reexamination Certificate
active
08005788
ABSTRACT:
A system and method for legacy system component incremental migration from a legacy system to a new system comprises a read-only ghost or shadow in the new system. When changes are made in the legacy system, the changes are incrementally and automatically migrated to the new system allowing the legacy system and the new system to maintain availability during the migration. The concept of “mastership” is used where a component exists in the “New System”, but is actually mastered in the “Legacy System”. By allowing a sub-component to exist as a read-only ghost or shadow in the new system, and still be mastered/edited in the legacy system, a one-way bridge is provided so that the two systems can interact. The synchronization of the legacy system component is managed so that the ghost component is automatically updated when changes are made to the legacy system component and there is little maintenance that the user needs to do to create the bridge between the two systems.
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Leroux Daniel D. J.
Shaw Steven R.
Corrielus Jean M
Hoffman Warnick LLC
International Business Machines - Corporation
McLoughlin Daniel
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