Granular replication of volume subsets
US11423004B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2015 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Mar 31, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/27
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data is replicated on a backup node, where the granularity of the replication can be less than a full volume. A data consistency group comprising a subset of data for a volume is defined for a primary node. A set of differences for the data consistency group is sent to a backup node. The backup node creates change logs in response to receiving the set of differences. In response to receiving a request to access a file having data in the data consistency group, the backup node creates a clone of the file. The backup node determines whether an update to a data block of the file exists in the change logs. In response to determining that the update to the data block exists in the change logs, the backup node updates a copy of the data block for the cloned file with data in the change logs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.