Code 42 Software, Inc.

Crashplan Group LLC

Marshall Scorcio

Peter John Lindquist

Brad Armstrong

Brian Bispala

Matthew Dornquast

Christopher Parker

Rory Lonergan

Damon Allison

In connection with a data distribution architecture, client-side 'deduplication' techniques may be utilized for data transfers occurring among various file system nodes. In some examples, these deduplication techniques involve fingerprinting file system elements that are being shared and transferred, and dividing each file into separate units referred to as 'blocks' or 'chunks.' These separate units may be used for independently rebuilding a file from local and remote collections, storage locations, or sources. The deduplication techniques may be applied to data transfers to prevent unnecessary data transfers, and to reduce the amount of bandwidth, processing power, and memory used to synchronize and transfer data among the file system nodes. The described deduplication concepts may also be applied for purposes of efficient file replication, data transfers, and file system events occurring within and among networks and file system nodes.

Deduplicated data distribution techniques

In connection with a data distribution architecture, client-side 'deduplication' techniques may be utilized for data transfers occurring among various file system nodes. In some examples, these deduplication techniques involve fingerprinting file system elements that are being shared and transferred, and dividing each file into separate units referred to as 'blocks' or &#x201c;chunks.&#x201d; These separate units may be used for independently rebuilding a file from local and remote collections, storage locations, or sources. The deduplication techniques may be applied to data transfers to prevent unnecessary data transfers, and to reduce the amount of bandwidth, processing power, and memory used to synchronize and transfer data among the file system nodes. The described deduplication concepts may also be applied for purposes of efficient file replication, data transfers, and file system events occurring within and among networks and file system nodes.

Systems and techniques for a distributed file system element collection are described herein. A node may identify a state of a file system element, which is identified in a file system element definition, from a local data store. The state corresponds to a distribution action. The file system element definition is one of a plurality of file system element definitions in a collection schema of a collection to which the node is a member. The node may, in response to identifying the state of the file system element, issue a communication to some members of the collection in furtherance of completion of the distribution action. A response may be received by the node from a participant node in the list of participant nodes. The node may complete the distribution action using content from the response.

Distributed file system backup and synchronization

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Marshall Scorcio