Patent · US Active

Hierarchical storage management for database systems

US8380929B2 · kind B2 · utility

2Cited by

4References

9Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Oliver Augenstein · Eppelheim, DE
Stefan Bender · Engen, DE
Karl Fleckenstein · Malsch, DE
Andreas Uhl · Eppelheim, DE

Key dates

Filing date	May 3, 2012
Grant date	Feb 19, 2013
Priority date	—
Expiry date	May 3, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02D10/00
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In response to read and write requests for data blocks at logical storage locations, a block mapping device determines physical storage locations on the storage devices. Read requests switch over secondary storage devices to the active mode when they are in the passive mode. Write requests write data blocks only to the primary storage devices. Secondary storage devices that have not been accessed for a minimum activation time may be switched over from the active to the passive mode to save power consumption and cooling. Data migration and data recall policies control moving of data blocks between the primary and secondary storage devices and are primarily based on threshold values.

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