Cloud-based snapshots with coarse and fine granularity maps for changed data
US10824375B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2017 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Jul 29, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/4557
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data protection appliances are provided for the protection of at least one virtual machine. A plurality of snapshots of at least one virtual machine are obtained. Each snapshot comprises (i) production data of the virtual machine, and (ii) a fine granularity data structure for changed data that is maintained in volatile memory and records metadata for input/output (I/O) operations corresponding to changed data. A metadata differential is generated by aggregating, for example, the fine granularity data structures for any time intervals since the prior snapshot that were flushed to a storage volume and included in the prior snapshot. The storage volume is replicated using the metadata differential. The snapshots optionally further comprise a coarse granularity bit map for changed data indicating whether corresponding blocks of data have changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.