The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2020
Filed:
Jun. 21, 2018
International Business Machines Corporation, Armonk, NY (US);
Christian Mueller, Dichtelbach, DE;
Mauro Cruciani, Mainz, DE;
Stefan Bender, Woerrstadt, DE;
Sabine U. Steinhauer, Ingelheim, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A backup system retains a certain number of file versions in backups of a virtual machine running on a host computing system. Files are identified that have changed on the virtual machine since storing a backup of the virtual machine on a backup server. Host blocks on that are associated with each of the changed files are determined. Backup blocks associated with each of the host blocks are determined. The changed files and associated backup blocks are merged with previous file version information. It is determined that a version of a file has become expired, the version of the file associated with a backup block. The backup block is deleted in response to determining that the backup block is not associated with any unexpired file versions and the backup block is not associated with any unexpired virtual machine backups.