Background movement of data between nodes in a storage cluster
US8521685B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Aug 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0647
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, apparatus, and computer-readable medium are described for the background movement of data between nodes in a storage cluster. According to one method, exception tables are generated that include data identifying the areas on each node that need to be migrated to another node and the areas on each node that are to be migrated from another node. The exception tables may be generated in response to the failure of a node in the storage cluster or in other circumstances. A background resynchronization thread utilizes the contents of the exception tables to migrate data between the nodes of the cluster, thereby synchronizing the data stored on the nodes. Input/output operations directed to an area that is to be migrated from another node are redirected to the other node in accordance with a timeout period associated with the input/output operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.