NAS system and remote copy method

Details NAS system and remote copy method NAS system and remote copy method

2006-03-21

2010-06-15

Vo, Tim T. (Department: 2168)

Data processing: database and file management or data structures

File or database maintenance

Database backup

C707S654000, C711S161000

Reexamination Certificate

active

07739242

ABSTRACT:
The present invention remote copies difference data for snapshots in an appropriate manner. A NAS system having one or more file systems for storing data, a snapshot producing section for producing snapshots for the file systems based on a pre-scheduled snapshot acquisition time, a remote copy section for remote copying difference data for the snapshots based on pre-scheduled remote copy start times, and a scheduling section for re-scheduling the time of one or more of an Nth snapshot acquisition time, an Nth remote copy start time, and an (N+1)th remote copy start time, in such a manner that remote copying starting at the Nth remote copy start time finishes by the (N+1)th remote copy start time.

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