Low overhead snapshot in a storage array using a...

Details Low overhead snapshot in a storage array using a... Low overhead snapshot in a storage array using a...

2005-12-20

2005-12-20

Vital, Pierre M. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S203000

Reexamination Certificate

active

06978353

ABSTRACT:
A method for creating a point-in-time copy of a data store. A command to create a point-in-time copy of an original data store is received. The processing of input/output operations to the original data store is suspended. A metadata structure of a copy data store is created. The metadata structure contains a null metadata slab tree, a backing store register, and a copy record, the copy record containing a pointer to a metadata structure of the original data store, the metadata structure of the original data store containing a pointer to the metadata structure of the copy data store. The processing of input/output operations to the original data store and to the copy data store is resumed.

REFERENCES:
patent: 6397308 (2002-05-01), Ofek et al.
patent: 6484186 (2002-11-01), Rungta
patent: 6532479 (2003-03-01), Souder et al.
patent: 2004/0064463 (2004-04-01), Rao et al.
“Sun StorEdge Instant Image Software Architecture Guide”, Dec. 2001, 52 pgs.

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