Boots – shoes – and leggings
Patent
1994-07-21
1995-07-18
Canney, Vincent P.
Boots, shoes, and leggings
395425, 364268, 3642685, 3642851, G06F 1100
Patent
active
054350042
ABSTRACT:
A computerized data backup system and method for dynamically preserving a consistent state of primary data stored in a logical volume of a disk volume management system during processing thereof in a real-time environment. A file system command invokes a cloning of the logical volume, thereby reserving a portion for shadow-paged blocks. A read/write translation map is generated, mapping non-shadowed pages to corresponding shadowed pages in the reserved portion. Upon generating a read command for a page in the logical volume, a map search detects that a shadow page is allocated in the shadow-paged blocks corresponding to the page and effects the read. In like manner, in response to a write command to a page of the logical volume, the map is searched and a shadow page in the shadow-paged blocks is allocated if there has been no prior allocation, whereupon writing to such allocated page occurs. The backup occurs during runtime, facilitating reading from the non-shadow paged blocks during backup.
REFERENCES:
patent: 4432057 (1984-02-01), Daniell et al.
patent: 4459658 (1984-07-01), Gabbe et al.
patent: 4654819 (1987-03-01), Stiffler et al.
patent: 4665520 (1987-05-01), Strom et al.
patent: 4686620 (1987-08-01), Ng
patent: 4819156 (1989-04-01), DeLorme et al.
patent: 4819159 (1989-04-01), Shipley et al.
patent: 4868744 (1989-09-01), Reinsch et al.
patent: 5043866 (1991-08-01), Myre, Jr. et al.
patent: 5043871 (1991-08-01), Nighigaki et al.
patent: 5072368 (1991-12-01), Foreman et al.
Cox James O.
Mott James M.
Canney Vincent P.
Carwell Robert M.
International Business Machines - Corporation
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