Patent · US Active

Distributed free block map for a clustered redirect-on-write file system

US8458181B2 · kind B2 · utility

6Cited by

23References

21Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Janet E. Adkins · Austin, US
Matthew T. Brandyberry · Austin, US
Joon Chang · Austin, US
David J. Craft · Hereford, US
Manoj Kumar · Austin, US
Andrew N. Solomon · Cedar Park, US

Key dates

Filing date	Dec 8, 2010
Grant date	Jun 4, 2013
Priority date	—
Expiry date	Feb 14, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F16/18
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a cluster that distributes fileset management, fileset managers will maintain a free block map and an in-flight block map to allocate blocks to clients writing to a relevant fileset. A fileset manager managing free block allocation for cluster clients that write to a fileset managed by the fileset manager. Since a clustered file system manager manages an initial free block map for the cluster (“cluster free block map”), the clustered file system manager provisions free blocks to fileset managers from the cluster free block map. The fileset manager then allocates free blocks from the provisioned free blocks to cluster clients that write to the fileset managed by the fileset manager.

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