Creation of clone storage area with identification of base stora

Details Creation of clone storage area with identification of base stora Creation of clone storage area with identification of base stora

1996-06-26

1998-06-02

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707200, 707201, 707203, 711112, 711117, 711162, G06F 1740

Patent

active

057616787

ABSTRACT:
A system and method efficiently manage clones of an object group. A base storage area contains metadata for each of multiple objects in the object group. The metadata for each object identifies data within each object. The system receives a request to clone a base storage area, and in response, the system creates a clone storage area containing an identification of the base storage area but not the metadata. If there is a subsequent request to update a portion of one of the objects, then the system copies the portion, copies the metadata into the clone storage area for the one object, makes the update to the object copy and changes the metadata in the base storage area to identify the portion copy instead of the original portion. If there is no subsequent request to update any of the multiplicity of objects, then the system does not copy the metadata for any of the multiplicity of objects into the clone storage area.

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