Patent · US Active

Time and space efficient technique for creating virtual volume copies

US7743031B1 · kind B1 · utility

36Cited by

14References

14Claims

0Family size

Assignee

3PAR Inc. · US

Inventors

George R. Cameron · Capitola, US
Hueichian Huang · San Jose, US

Key dates

Filing date	Sep 4, 2003
Grant date	Jun 22, 2010
Priority date	—
Expiry date	Jun 6, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG06F2201/84
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A snapshot tree structure includes a base volume storing a current user data at a current time, a first read-only snapshot descending from the base volume, and a second read-only snapshot descending from the first read-only snapshot. The first read-only snapshot is created at a first time earlier than the current time. The first read-only snapshot stores a first data of the base volume at the first time before the first data is modified in the base volume. The second read-only snapshot is created at a second time earlier than the first time. The second read-only snapshot stores a second data of the base volume at the second time before the second data is modified in the base volume.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.