| Patent application number | Description | Published |
|---|
| 20090150414 | DETECTING NEED TO ACCESS METADATA DURING FILE OPERATIONS - A method includes receiving a request, probing a first file server based on the request, and reading a stub file on the first file server based on a result of the probing. The stub file includes target information. The method further includes storing at least a portion of the target information. | 06-11-2009 |
| 20090150449 | OPEN FILE MIGRATION OPERATIONS IN A DISTRIBUTED FILE SYSTEM - In at least some disclosed embodiments, a method includes a) creating a first stub file on a target file server, b) creating a t-stub file at the location of the source directory, c) disabling performance of operations on the source data while allowing completion of operations in progress, d) copying the source data into a hidden directory on the target file server, thus creating target data, e) overwriting the first stub file by renaming the target data, f) enabling performance of operations on the target data, g) performing queued operations on the target data, and h) deleting the source data from the source file server. | 06-11-2009 |
| 20090150533 | DETECTING NEED TO ACCESS METADATA DURING DIRECTORY OPERATIONS - In at least some disclosed embodiments, a method includes receiving a request to list information about data in a first directory, and searching for a unique symbol in the first directory based on the request. The unique symbol is associated with a stub file in the first directory. The method further includes providing information about data in a second directory in response to the request if the unique symbol is found. | 06-11-2009 |
| 20090204705 | On Demand File Virtualization for Server Configuration Management with Limited Interruption - Inserting a file virtualization appliance into a storage network involves configuring a global namespace of a virtualization appliance to match a global namespace exported by a distributed filesystem (DFS) server and updating the distributed filesystem server to redirect client requests associated with the global namespace to the virtualization appliance. Removing the file virtualization appliance involves sending a global namespace from the virtualization appliance to the distributed filesystem server and configuring the virtualization appliance to not respond to any new client connection requests received by the virtualization appliance. | 08-13-2009 |
| 20090210431 | Load Sharing Cluster File Systems - Load sharing clusters in which each node is responsible for one or more non-overlapping subset(s) of the cluster namespace and will process only those requests that access file or directory objects in the partitioned namespace that the node controls while redirecting requests designated for other nodes. A non-overlapping subset may be migrated from a source node to a destination node, for example, for load sharing or hotspot mitigation. Migration typically includes maintaining a file virtualization link from the destination node to the source node to permit forwarding of requests by the destination node to the source node during migration of metadata and then migration of data from the source node. After migration is complete, the file virtualization link is broken and the destination node services requests for the non-overlapping subset from the migrated metadata and data. | 08-20-2009 |
| 20090254592 | Non-Disruptive File Migration - Non-disruptive migration of the native volume from the source server to the destination server performed by a file switch involves converting the source native volume to a native with metadata volume; converting the native with metadata volume to a mirrored native with metadata volume including the source server and the destination server, the destination server including a mirror copy of the native with metadata volume; removing the source server from the mirrored native with metadata volume; and converting the mirror copy of the native with metadata volume on the destination server to a destination native volume on the destination server. | 10-08-2009 |
