The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2003
Filed:
Apr. 21, 1999
Novell, Inc., Provo, UT (US);
Abstract
A system and method for synchronizing database information over a communications network distributed among a plurality of servers. The system allows each server to track the state of a replica on each of the servers, and changes to the servers are communicated between the servers along with their states. The states may be stored as an array of timestamps, the timestamps each indicating a time at which the replica on each server was updated. In a network wherein two servers (a first and third server) cannot communicate directly, a first network server transmits a change to an intermediate (a second) server including its state information. The second server transmits the change to the third server, and the third server updates its replica. The third server transmits its state information to the second server, and the timestamp information is conveyed to the first server. The state information of the third server may be transmitted to the second server during later updates of the third server's replica. The first server, by receiving the third server's state information, can determine that the change in replica information was performed on the third server. The synchronization system and method may be used to transmit changes, such as those involved in a partitioning operation.