Highly available fault tolerant relocation of storage with atomi

Details Highly available fault tolerant relocation of storage with atomi Highly available fault tolerant relocation of storage with atomi

1993-03-04

1996-04-02

Beausoliel, Jr., Robert W.

G06F 1100

Patent

active

055048579

ABSTRACT:
A computer implemented method for robustly copying pages to system managed storage in order to maintain data in a consistent state and in order to provide continuous access availability of the pages to executing applications. The method achieves data consistency by atomically shadow copying application referenced pages and amending directories in a failure independent medium on (1) an access path interrupt as well as on (2) a page update basis. Availability is enhanced by duplexing the pages and directories as part of the atomic shadow copying step.

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