Single instance storage of information

Details Single instance storage of information Single instance storage of information

1996-07-12

1998-09-22

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707104, G06F 1730

Patent

active

058130080

ABSTRACT:
Information items commonly have a unique portion and a common portion that is the same for multiple items. The common portions of information items are stored once. Each common portion is assigned a globally unique single-instance identifier. Each unique portion of an information item stores the single-instance identifier of the associated common portion. A reference count, stored with the common portion, reflects the number of unique portions associated with the common portion. When an information item is created or distributed, the single-instance identifier of the common portion is used to ensure that multiple copies of the common portion are not stored.

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