Recording notations per file of changed blocks coherent with a draining agent
US7761424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2006 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Apr 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1095
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided are techniques for transferring data. It is determined whether an indicators map is to be associated with a source file that is being opened, wherein the indicators map indicates which source blocks of the source file have been updated since last being transferred to a target file. In response to determining that an indicators map is to be associated with the source file, it is determined whether the indicators map exists. In response to determining that the indicators map exists, it is determined whether the indicators map is to be trusted based on a last modified time and a last source file size stored in the indicators map and the source file. In response to determining that the indicators map is to be trusted, the indicators map is initialized. Then, in response to receiving a write for the source file, the indicators map is updated to indicate which portion of the source file has been modified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.