Boots – shoes – and leggings
Patent
1990-12-20
1992-12-29
Anderson, Lawrence E.
Boots, shoes, and leggings
395575, 3642665, 3642821, 3642851, 364974, 3649419, G06F 1540
Patent
active
051758490
ABSTRACT:
To create a snapshot copy of selected elements of a database in a data processing system, the selected elements are copied sequentially to a secondary storage device. During the copying operation, when a task requests to delete one of the selected elements from the database before it is copied to the secondary storage device, a record is made to identify the requested element, the task is allowed to continue processing. After the element has been copied to the secondary storage device, the identified element will be deleted based upon the record. Also, during the creation of the copy, when a task requests to update one of the selected elements, a duplicate copy of the requested element is created and the task is allowed to update the requested element. When it is time to copy the requested element to the secondary storage device, the duplicate copy will be used.
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Amdahl Corporation
Anderson Lawrence E.
Lim Krisna
Lovejoy David E.
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