Storage system configured for controlled transition between asynchronous and synchronous replication modes
US10496489B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Feb 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A first storage system is configured to participate in a replication process with a second storage system. The first and second storage systems initially operate in an asynchronous replication mode and subsequently transition to a synchronous replication mode. The first and second storage systems concurrently operate in both modes for at least a portion of the transition. While the first and second storage systems are concurrently operating in both modes, the first storage system is configured to detect a given data page that has been subject to one or more write operations in the first storage system since generation of a corresponding set of one or more snapshots for a most recent data transfer cycle of the asynchronous replication mode, to initiate a data transfer request for the given data page, and to update a content-based signature of the given data page. The second storage system determines whether to accept or reject the transfer of the given data page.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.