US Patent No: 8,170,985

Number of patents in Portfolio can not be more than 2000

Primary stub file retention and secondary retention coordination in a hierarchical storage system

ALSO PUBLISHED AS: 20070179990

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A protected file is retained in secondary storage for a retention period, and a corresponding stub file is retained in primary storage for the retention period. The stub file retains attributes of the file indicating a location of the file data in the secondary storage and indicting that the stub file is to be retained for the retention period. A system administrator may instruct a primary file server that a secondary file server supports retention based protection and it is desired to protect stub files corresponding to protected files that are migrated to the secondary file server. The primary file server may request the secondary file server to return a protection status of the file after migration. This enables automatic policy-based migration to both file level retention (FLR) and non-FLR retention protected secondary storage from diverse applications accessing FLR or non-FLR files in the primary storage.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EMC CORPORATIONHOPKINTON, MA4254

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chuba, Christian J Berkeley Heights, NJ 5 54
Stacey, Christopher H Swindon, GB 12 368
Walker, Mary Windham, NH 4 102
Zimran, Eyal Richmond, GB 16 383

Cited Art Landscape

Patent Info (Count) # Cites Year
 
EMC CORPORATION (7)
5,893,140 File server having a file system cache and protocol for truly safe asynchronous writes 204 1996
5,901,327 Bundling of write data from channel commands in a command chain for transmission over a data link between data storage systems for remote data mirroring 556 1997
6,185,661 Worm magnetic storage device 26 1998
6,269,431 Virtual storage and block level direct access of secondary storage for recovery of backup data 595 1998
6,938,039 Concurrent file across at a target file server during migration of file systems between file servers using a network file system access protocol 95 2000
2006/0212,481 Distributed open writable snapshot copy facility using file migration policies 45 2005
2006/0212,746 Selection of migration methods including partial read restore in distributed storage management 49 2005
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (4)
5,835,954 Target DASD controlled data migration move 147 1996
6,023,709 Automated file error classification and correction in a hierarchical storage management system 77 1997
2006/0123,232 Method for protecting and managing retention of data on worm media 13 2004
2007/0106,710 Apparatus, system, and method for data migration 9 2005
 
MICROSOFT CORPORATION (3)
6,490,666 Buffering data in a hierarchical data storage environment 49 1999
6,804,719 Method and system for relocating files that are partially stored in remote storage 45 2000
6,757,794 Buffering data in a hierarchical data storage environment 136 2002
 
NETWORK APPLIANCE, INC. (2)
5,963,962 Write anywhere file-system layout 440 1998
6,665,689 Backup and restore for heterogeneous file server environment 34 2001
 
DROPBOX, INC. (1)
6,078,929 Internet file system 130 1997
 
MARKOWITZ, JEFFREY (1)
5,974,563 Real time backup system 515 1998
 
The Sanwa Bank Limited (1)
5,596,706 Highly reliable online system 69 1994

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EMC CORPORATION (1)
8,516,022 Automatically committing files to be write-once-read-many in a file system 1 2012
 
HITACHI, LTD. (1)
8,316,065 Data migration system and data migration method 0 2009

Maintenance Fees

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