Systems and methods of data migration in snapshot operations

Details Systems and methods of data migration in snapshot operations Systems and methods of data migration in snapshot operations

2006-11-14

2006-11-14

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S165000

Reexamination Certificate

active

07136974

ABSTRACT:
The invention relates to snapshots of a data storage system including a host that communicates with a cache memory, source storage, target storage, and metadata, including a source storage for active data, a target storage to store migrated snapshot data, first metadata (e.g., bitmaps and log files with pointers) to indicate when and where the first snapshot data is in target storage, and second metadata (e.g., bitmaps and log files pointers) to indicate when and where the second snapshot data is in target storage where the first and second metadata locate the same snapshot data in the target storage. The invention maintains data consistency when reading metadata for snapshots into host memory, searching the metadata to identify snapshots that require original data to be destaged, destaging the original data to target storage, and updating the metadata to locate the original data and indicate completion of the target destage operation.

REFERENCES:
patent: 5379391 (1995-01-01), Belsan et al.
patent: 5499354 (1996-03-01), Aschoff et al.
patent: 5535372 (1996-07-01), Benhase et al.
patent: 5539915 (1996-07-01), Burton et al.
patent: 5581743 (1996-12-01), Burton et al.
patent: 5774682 (1998-06-01), Benhase et al.
patent: 5778430 (1998-07-01), Ish et al.
patent: 5819292 (1998-10-01), Hitz et al.
patent: 5930481 (1999-07-01), Benhase et al.
patent: 5948110 (1999-09-01), Hitz et al.
patent: 6014730 (2000-01-01), Ohtsu
patent: 6182198 (2001-01-01), Hubis et al.
patent: 6247099 (2001-06-01), Skazinski et al.
patent: 6393535 (2002-05-01), Burton et al.
patent: 6425051 (2002-07-01), Burton et al.
patent: 6434681 (2002-08-01), Armangau
patent: 6460122 (2002-10-01), Otterness et al.
patent: 6480969 (2002-11-01), Hitz et al.
patent: 6487680 (2002-11-01), Skazinski et al.
patent: 6490659 (2002-12-01), McKean et al.
patent: 6618794 (2003-09-01), Sicola et al.
patent: 2001/0049779 (2001-12-01), Shimada et al.
patent: 2002/0029281 (2002-03-01), Zeidner et al.
patent: 2002/0053009 (2002-05-01), Selkirk et al.
patent: 2002/0156987 (2002-10-01), Gajjar et al.
patent: 2003/0101321 (2003-05-01), Ohran
patent: 2003/0131278 (2003-07-01), Fujibayashi
patent: 2004/0024961 (2004-02-01), Cochran et al.

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