Maintaining data block maps of clones of storage objects
US9830096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2015 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Mar 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/289
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Described herein is a system and method for retaining deduplication of data blocks of a resulting storage object (e.g., a flexible volume) from a split operation of a clone of a base storage object. The clone may comprise data blocks that are shared with at least one data block of the base storage object and at least one data block that is not shared with at least one data block of the base storage object. The data blocks of the clone that are shared with the base storage object may be indicated to receive a write allocation that may comprise assigning a new pointer to an indicated data block. Each data block may comprise a plurality of pointers comprising a virtual address pointer and a physical address pointer. As such, data blocks of the clone comprising the same virtual address pointer may be assigned a single physical address pointer. Thus, a new physical address pointer is assigned or allocated once to a given virtual address pointer of data blocks of a clone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.