MAINTAINING GLOBAL NAMESPACE CONSISTENCY FOR A DISTRIBUTED FILESYSTEM

摘要

The disclosed embodiments disclose techniques for maintaining global name consistency for a distributed filesystem. Two or more cloud controllers collectively manage distributed filesystem data that is stored in one or more cloud storage systems; the cloud controllers ensure data consistency for the stored data, and each cloud controller caches portions of the distributed filesystem. During operation, a cloud controller receives a client request to perform a namespace operation upon a filesystem object. The cloud controller contacts the cloud controller that manages (“owns”) the portion of the global namespace for the distributed filesystem that includes the filesystem object. This second cloud controller ensures the consistency of the filesystem object across the distributed filesystem during the namespace operation.

主权项

1. A computer-implemented method for maintaining global namespace consistency for a distributed filesystem, the method comprising:
collectively managing the data of the distributed filesystem using two or more cloud controllers, wherein collectively managing the data comprises storing the data for the distributed filesystem in one or more cloud storage systems, wherein the cloud controllers cache and ensure data consistency for data stored in the cloud storage systems; receiving at a first cloud controller a request from the client to perform a namespace operation upon a filesystem object; contacting a second, distinct cloud controller that manages a portion of the global namespace for the distributed filesystem that includes the filesystem object; and ensuring the consistency of filesystem object across the distributed filesystem during the namespace operation.