Data processing: database and file management or data structures – Database design – Data structure types
Patent
1997-10-16
1999-08-03
Lintz, Paul R.
Data processing: database and file management or data structures
Database design
Data structure types
711114, 711170, 39518204, 39520049, G06F 1730
Patent
active
059338342
ABSTRACT:
In a computer system having a processor, memory, and a set of storage units storing a set of objects, each object comprising a set of segments arranged in a set of original object stripes on separate storage units, a directory is maintained identifying an object name and a location of each stripe of the object in the set of storage units. A method is provided for re-striping the set of objects onto an expanded set of storage units comprising the set of storage units and at least one other additional storage unit. A list is maintained of each object to be copied onto the expanded set of storage units. Each segment is copied to a new set of stripes on a separate storage unit of the expanded set to create a new object while continuing to store an original copy of each segment of the list object in the original set of object stripes. The directory is updated to include a new object name and a new location of each new stripe of the new object. After all the list object segments are copied to the new stripes, the original copy of each list object segment is deleted and the new object is renamed in the directory to the list object name.
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Colbert Ella
International Business Machines Incorporated
Krall Noreen A.
Lintz Paul R.
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