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. 28, 2022
Filed:
Mar. 18, 2020
Emc Ip Holding Company Llc, Hopkinton, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques are provided for utilizing snapshot longevity information to manage snapshots of storage volumes in a snapshot-enabled storage system. A snapshot management system maintains a snapshot volume tree which comprises a plurality of snapshots having respective longevity ranking values. The longevity ranking value of a given snapshot represents an expected life span of the given snapshot as compared to expected life spans of other snapshots as indicated by their respective longevity ranking values. When a snapshot is deleted, the snapshot management system determines a set of candidate snapshots which can assume ownership of uniquely-written data of the deleted snapshot, evaluates the longevity ranking values of the candidate snapshots to select a candidate snapshot to assume ownership of the uniquely-written data of the deleted snapshot, and modifies metadata of the selected snapshot to transfer the ownership of the uniquely-written data from the deleted snapshot to the selected snapshot.