Committing copy-on-write transaction with a persist barrier for a persistent object including payload references
US10229012B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2017 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Aug 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/1044
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems implementing copy-on-write (COW) as described herein may reduce the number of persist barriers executed within a transaction. For instance, a system may eliminate some, most or all persist barriers related to memory allocation/deallocation in COW transactions. A COW implementation may introduce an extra level of indirection between a persistent type instance and the real data type it encloses. A persistent type may include pointers to old and new versions of the enclosed type's instances. Before modifying an object, a transaction may modify a copy-on-write persistent object and create a new copy of the payload. The modified object may be added to a list of objects written to by the transaction. The transaction may be committed by issuing persist barriers in the commit operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.