Versioning and non-disruptive servicing of in-memory units in a database
US10572469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Feb 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for non-disruptive versioning of in-memory units in a database are provided. A database server generates and maintains a first IMU that reflects changes made to a mirrored-data-set up to a first snapshot time, and a second IMU that reflects changes made to the mirrored-data-set up to a second snapshot time. During a first period, the database server responds to updates to first data items in the mirrored data by storing first staleness metadata that indicates that the copies of the first data items in the first IMU are stale. During a second period, the database server responds to updates to second data items in the mirrored data by storing second staleness metadata that indicates that the copies of the second data items in the second IMU are stale. The database server responds to a request by accessing the first IMU or the second IMU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.