Assignment of longevity ranking values of storage volume snapshots based on snapshot policies
US11513997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | May 14, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are provided for utilizing snapshot longevity information to manage snapshots in a snapshot-enabled storage system. A snapshot management system generates a snapshot volume tree which comprises snapshots associated with a given storage volume. The snapshot management system obtains a snapshot policy associated with the given storage volume, which comprises a snapshot creation and retention schedule that specifies retention lifespans of the snapshots. The snapshot policy is evaluated to automatically determine and assign respective longevity ranking values for the snapshots within the snapshot volume tree, wherein the longevity ranking value of a given snapshot represents a retention lifespan of the given snapshot as compared to retention lifespans of other snapshots as represented by their respective longevity ranking values. When a snapshot is deleted, the assigned longevity ranking values of the snapshots are utilized to select a snapshot to assume ownership of uniquely-written data that is owned by the deleted snapshot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.