Handling temporary files in a file system with snapshots

Details Handling temporary files in a file system with snapshots Handling temporary files in a file system with snapshots

2011-06-07

2011-06-07

Elmore, Stephen C (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C707S639000

Reexamination Certificate

active

07958325

ABSTRACT:
A temporary file is identified. The temporary file includes a data block containing a first file image. A determination is made whether the temporary block has been included in a previous snapshot. Responsive to receiving a modification of the temporary block that has been included in the previous snapshot, a modified first image is created. The modified image is stored in the original file block, and the original image is copied to a newly allocated block. The original first block is updated to include a reference to the second block.

REFERENCES:
patent: 5819292 (1998-10-01), Hitz et al.
patent: 6401093 (2002-06-01), Anand et al.
patent: 2003/0159007 (2003-08-01), Sawdon et al.
patent: 2005/0138312 (2005-06-01), Kubo et al.
patent: 2006/0041727 (2006-02-01), Adkins et al.
patent: 2007/0022117 (2007-01-01), Keohane et al.
patent: 2008/0046476 (2008-02-01), Anderson et al.

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