Data transfer and synchronization system

• US 20050099963A1
• Filed: 10/28/2004
• Published: 05/12/2005
• Est. Priority Date: 01/26/2000
• Status: Abandoned Application

• Current Assignee: David L. Multer, Donald W. Cash, Leighton A. Ridgard, Liam J. Stannard, Richard M. Onyon, Robert E. Garner
• Original Assignee: David L. Multer, Donald W. Cash, Leighton A. Ridgard, Liam J. Stannard, Richard M. Onyon, Robert E. Garner
• Inventors: Stannard, Liam J., Cash, Donald W., Multer, David L., Ridgard, Leighton A., Onyon, Richard M., Garner, Robert E.
• Application Number:
  US10/976,584
• Publication Number:
  US 20050099963A1
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: G06F 16/178 Techniques for file synchronisation in file systems

Abstract

A data transmission system which optimizes transfer and updates of information between systems by providing difference information between the systems is disclosed. Information transfer can occur one way (broadcast) or two-way (sync). In a first aspect, the system includes a differencing transmitter transmitting at least one set of difference transactions and a differencing receiver receiving said at least one set of difference transactions. The differencing transmitter of the data transmission system may comprise a difference source interface, a copy of a previous state of said difference source, and a difference transaction generator. The differencing receiver of the data transmission system comprises a difference destination interface, a copy of a previous state of said difference destination, and a destination data constructor. In a further embodiment, the data transmission system is coupled to a network. The system includes a differencing transmitter the transmitting at least one set of change transactions reflecting changes to a data source to the network, and a plurality of differencing receivers coupled to the network receiving said at least one set of change transactions from the network. A method for synchronizing at least a first file and a second file resident on a first and a second systems, respectively, is provided. The method comprises the steps of: determining difference data resulting from changes to a first file on the first system; transmitting the difference information to a second system; applying the difference information to generate change data for the second file; and updating the second file on the second system with the difference data.

Claims

1. A data transmission system, comprising:

a differencing transmitter transmitting at least one set of difference transactions; and

a differencing receiver receiving said at least one set of difference transactions.

2-75. -75. (canceled)