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
Method, system and program for securing redundancy in parallel computing system
Process for the preparation of diene polymers of statistical vinylarene-diene copolymers
Data processing circuit with arbitration between a plurality of queues
Semiconductor device, integrated circuit and method of manufacturing an integrated circuit
Phase noise extraction apparatus and technique
Systems and methods for vehicle cruise control
Stock analysis method, computer program product, and computer-readable recording medium
  Randomly Featured Patents
Fluid friction controller
Axial flow fan for air conditioner
Method and system for optimizing intra-field critical dimension uniformity using a sacrificial twin mask
Blood oxygenator
Inductive solid state magneto ignition system
Method for inside coating double curved shell
Document sensing apparatus
Card holder
Vertically positioned transfer system for controlling and initiating the flow of metered amounts of solid materials
Secure safe sender list