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

2006-11-13

2009-02-24

Sough, Hyung S (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S165000

Reexamination Certificate

active

07496725

ABSTRACT:
The invention relates to methods of snapshot operation for a data storage system with a host communicating with a cache memory, a source Virtual Logical Unit Number (VLUN) and a target VLUN, including generating first metadata (e.g., bitmaps and log files pointers) to locate first snapshot data and to indicate when the first snapshot data is in the target VLUN and generating second metadata to locate second snapshot data and to indicate when the second snapshot data is in the target VLUN, wherein the first and second metadata locate the same data in the target VLUN. The invention relates to systems that implement the methods. It relates to destaging data to maintain data consistency including reading metadata for snapshots, searching the metadata to identify snapshots that require original data to be destaged, destaging the original data to target storage, and updating metadata to locate original data and indicate destage completion.

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 et al.
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.

Affiliated with

Also associated with

Rating

Systems and methods of data migration in snapshot operations does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Systems and methods of data migration in snapshot operations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods of data migration in snapshot operations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4067775