Migrating data objects together with their snaps
US9830105B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jan 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/604
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for performing non-disruptive migration coordinates object migration with snapshot-shipping to migrate both a data object and its snaps from a source to a target. Snapshot-shipping conveys snaps to the target, and an internal snap of the data object serves as a basis for building a migrated version of the data object at the target. As IO requests specifying writes to the data object arrive at the source, a data mirroring operation writes the arriving data both to the data object at the source and to the version thereof at the target. In parallel with the data mirroring operation, a filtering copy operation copies data of the internal snap to the target, but avoids overwriting data mirrored to the target after the internal snap is taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.