System and method for preserving state for a cluster of data servers in the presence of load-balancing, failover, and fail-back events
US7962915B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2005 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jul 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1001
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A state management system preserves a state for a cluster of file servers in a cluster file system in the presence of load balancing, failover, and fail-back events. The system provides a file and record locking solution for a clustered network attached storage system running on top of a cluster file system. The system employs a lock ownership scheme in which ownership identifiers are guaranteed to be unique across clustered servers and across various protocols the clustered servers may be exporting. The system supports multi-protocol clustered NAS gateways, NAS gateway server failover and fail-back, and load-balancing architectures. The system further eliminates a need for a lock migration protocol, resulting in improved efficiency and simplicity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.