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:
Jun. 29, 2021
Filed:
Oct. 18, 2017
Quantum Corporation, San Jose, CA (US);
William Middlecamp, Apple Valley, MN (US);
Jon Hendrickson, Lakeville, MN (US);
Quantum Corporation, San Jose, CA (US);
Abstract
Example methods and apparatus release storage locations in a tiered storage system by deleting expired tier-copies of a file stored in the tiered storage system. One embodiment includes a policy-class circuit that defines a tier-copy policy associated with a tier, where the tier-copy policy includes an expiration interval (EI) associated with the tier, and a schedule associated with the tier. A copy expiration circuit checks, according to the schedule, for expiration-eligible tier-copies of a file stored in the tiered storage system based, at least in part, on an EI associated with a tier, and on an access time (AT) associated with the file, where the AT denotes the last time the file was accessed. The copy expiration circuit, upon determining that a tier-copy is expiration eligible, declares the tier-copy as expiration eligible. A delete/restore circuit, upon the copy expiration circuit declaring that the tier-copy is expiration eligible, deletes the tier-copy.