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For example, if a modification time attribute of a file has changed, associated data content is invalidated. A system and method is disclosed for maintaining, in a Storage Area Network SAN , the consistency of a local copy of a remote file system sub-tree obtained from a remote source. The present invention arranges SAN file system contents in containers, specifically remote containers hold DST-managed data originating from remote sources. Not Applicable H6 Headings: Cloud enabled filesystems provided by an agent which interfaces with a file system on a data source device.

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Collectively shown in FIGS. Before the start of the process, each remote file system is mapped to a remote container and remote directory structure of remote file system is mirrored locally.

RAA passes the requested file system object content and a range of block addresses to SAN disk for storage.

If the requested object is present, DST verifies the validity of requested object. Additionally, consistency policies are enabled based on file system object attributes, for example, name and size.

In stepit is determined whether a local entry exists for a name selected from list returned in step Not Applicable H5 Headings: If modifications to marked local copy in step affect metadata, directory content exportation process continues to step where RAA obtains changed directory entries from RCM via DFM for marked local copies.

DFM is used to request directory mappings and attributes for objects individually e. Depending on the security protocol in use, RAA receives credentials for a particular user and uses them as necessary to perform authentication.

Not Applicable Bing Indexed Pages: A protocol-specific implementation of RAA is invoked by DFM to initiate communications with remote source There is depicted in the drawings, and will herein be described in detail, a preferred embodiment of the invention, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and the associated functional specifications for its construction and is not intended to limit the invention to the embodiment illustrated.

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The present invention provides for a method for maintaining, in a Storage Area Network SANthe consistency of a local copy of a remote file system sub-tree obtained from a remote source, wherein the method comprises the steps of: The system of claim 24wherein said explicit consistency guarantee exists until notification is received from said remote source. RAA implements network file access protocols used to communicate with remote source and directs transfer of file content between remote sources and SAN disks.

RCM communicates with CM to request storage space for remote file system objects.

RAA obtains a directory contents listing from remote source and determines if a requested file system object is present. RAA provides for reading file system object contents and attributes from remote sourcereturning of metadata to DFMwriting of file contents to SAN diskand managing authentication and protocol state for DFM The separation of the DFM and RAA necessitates inter-process communication between machines hosting each module. The computer storage medium includes any of, but is not limited to, the following: While this invention is illustrated and described in a preferred embodiment, the invention asanifle be produced in many different configurations.

A cache is a partial set selected and validated by local demand. Field of Invention The present invention relates generally to the field of file sharing.

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Veteran Central is a site whose aim is to provide support to veterans once they return home. The article of manufacture of claim 1wherein said local object components are hierarchically structured within said container in a manner corresponding to hierarchical structure of asanfilf remote objects comprising said remote file system sub-tree. Network attached storage device with automatically configured distributed file system and fast access from local computer client.

Replicas are well-defined subsets of remote data, which have common policies for validation and update consistency. File server system providing direct data sharing between clients with a server acting as an arbiter and asnfile.

Remote Access Agent RAA handles protocol-specific details necessary to manage communications with a remote source. Prior to direct operations on file system object contents, operations on metadata occur.

Techniques for resource operation based on usage, sharing, and recommendations with modular authentication. Conflict management during data object synchronization between client and server.

Modifications to file system objects made locally are updated at remote source in accordance with a policy specified in CMF Multi-tenant environments tenant-specific data set management method and system. Directory exportation process terminates in step These considerations control the delay between the time at which a file system object is modified and when modification updates are sent back to a remote source.