Managing a deletion of a volume referenced by a snapshot of a consistency group
US10241869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2017 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Apr 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a volume that was once associated with a consistency group and is to be deleted from the storage system, the to be deleted volume is designated as a ghost volume within the storage system, and the deletion of the ghost volume from the storage system is delayed until there are no snapshots that include a pointer to the ghost volume. The storage system may include a counter that counts the number of instances all volumes within a consistency group are pointed to or that counts the number of instances that only ghost volumes are pointed to. The storage system may reference this count to determine whether to immediately delete or delay the deletion of the volume from the storage system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.