Aggregate failover for a distributed scale-out storage system
US12153504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2022 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Apr 17, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1662
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are provided for failing over an aggregate from one file system instance to a different file system instance of a distributed scale-out storage system. The aggregate may be stored within distributed storage that is accessible to a plurality of file system instances of the distributed scale-out storage system. When the aggregate is failed over from a first file system instance to a second file system instance, the first file system instance may still have a valid read lease that allows the first file system instance to serve client I/O, directed to the aggregate, using a cache. In order to prevent the first file system instance from serving stale data from the cache before the read lease expires, state machines and a set of control data are used to ensure that the second file system instance attaches to the aggregate only after the read lease has expired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.