Using current internal mapping mechanisms to implement dynamic mapping operations
AssigneeStorage Technology Corporation
InventorsStephen S. Selkirk, Charles A. Milligan
Life of this patent
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Abstract
A method for using existing internal mapping mechanisms to dynamically map data in a computer storage subsystem is provided. The invention comprises using a dynamic mapping mechanism to mark (e.g., via a D-Mark) a data location and then using pointers to direct write requests for the data location to a side file. The new data is then written in the side file and a housekeeping operation reconciles the old and new data locations.
Claims23
A method for dynamically mapping data in a computer storage subsystem, comprising:
- using an internal mapping mechanism to mark an old data location;
- pointing write requests for the old data location to a side file;
- writing new data to the side file;
- and
- reconciling the old and new data locations.
A computer program product in a computer readable medium for use in a data processing system, for dynamically mapping data in a computer storage subsystem, the computer program product comprising:
- instructions for using an internal mapping mechanism to mark an old data location;
- instructions for pointing write requests for the old data location to a side file;
- instructions for writing new data to the side file;
- and
- instructions for reconciling the old and new data locations.
A system for dynamically mapping data in a computer storage subsystem, comprising:
- an internal mapping mechanism to mark an old data location;
- an indirection component to point write requests for the old data location to a side file;
- a writing component to write new data to the side file;
- and
- a processing component for reconciling the old and new data locations.
Dependencies are inferred from the claim text.