Resources Contact Us Home
Detecting and recovering from silent data errors in application cloning systems

Image Number 10 for United States Patent #8117496.

A method, system, and article for resolving a silent error is disclosed. A primary program copy runs on a primary host, and a secondary program copy runs on a secondary host. The primary and secondary copies communicate to maintain synchronized execution. A third copy of the data is stored on a storage device as a write operations log and maintained in memory on the primary host while the program is running. The primary copy is synchronized with the secondary copy by computing a first checksum of data on the primary host in response to a read operation local to the primary host, computing a second checksum of data on the secondary host in response to a read operation local to the secondary host, and periodically communicating the first checksum to the secondary host, and resolving any discrepancies between the first and second checksum of data reflecting a silent data error.

  Recently Added Patents
Implantable neuro-stimulation electrode with fluid reservoir
Molecular sieve
Soybean EF1A promoter and its use in constitutive expression of transgenic genes in plants
Power storage device and method for manufacturing the same
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Transparent conductive structure
Apparatus and method for controlling a tunable matching network in a wireless network
  Randomly Featured Patents
Multiple language character generating system
Corrosion resisting copper alloy
System, navigation method, medium, and information set
Mold for making a window frame
Windshield wiper assembly
Sulfo group containing triphendioxazines having at least one 1,3,5-triazine ring
Optical communication system using optical frequency code, optical transmission device and optical reception device thereof, and reflection type optical communication device
Electrode configurations for plasma-dome PDP
Electromechanical chime
Switching converter including a rectifier element with nonlinear capacitance