Fast failover with multiple secondary nodes
US7617369B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Nov 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, computer system, and computer program product to quickly synchronize replicas of data stored at multiple secondary nodes upon failure of a primary node. Secondary nodes to which an update to data is sent are identified. The secondary nodes insert the update into a respective log of updates to a respective copy of the data. When all of the secondary nodes have acknowledged the update, a notification is sent to each of the secondary nodes. In response to receiving the notification, each of the secondary nodes clears the update from the respective log. Data at one secondary node can be synchronized with data at another secondary node when one of the nodes has received updates from the primary node that the other secondary node has not yet received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.