Mechanisms for adaptively entering and exiting recovery mode. When a message is received from a particular message transaction, the appropriate processing instance is loaded from persistent memory to system memory. The processing instance then determines from its own state information whether or not it is in recovery mode. This indication of recovery or normal mode may be set by a system-wide recovery detection module. If the processing instance determines that it is in normal mode, then the pro...

Diagnostic information is produced from a computer memory operably connected to a DBMS. A command is received from a user wherein the command comprises an identifier of a resource associated with the DBMS. The identifier is utilized to determine one or more control blocks residing within the computer memory and wherein the one or more control blocks are related to the resource. The memory locations occupied by the one or more control blocks are determined and the contents of the memory locations...

An embodiment of a method of seeking consensus among computer processes begins with a first step of saving a new timestamp in a timestamp array for a particular process. The method continues with a second step of determining whether a most recent entry in a decision array includes a previously established consensus decision. In a third step, if the most recent entry does not include the previously established consensus decision, the method saves a proposed decision as a consensus decision. Other...

A method for monitoring a data processing system is proposed. The method involves the measuring of state parameters of the system. Indicators of the performance of the system are then inferred from the state parameters by applying fuzzy-logic rules. The proposed solution is based on the idea of estimating a trust value, based on the effectiveness of the corrective actions. If the previous corrective actions prove to be effective than the trust value is enhanced and the system is allowed a higher...

In a data center, when a server is disconnected from the Internet because of illegal manipulation of a file, valid files (not manipulated) are copied to a standby server and the processing is resumed after a short period of disconnection. According to the invention, a control program P10 performs manipulation checks for all files listed in a manipulation checklist. If any of them is manipulated, it issues a request to disconnect from the external network and a request to assign a standby server ...

A common design framework for input and output signal validation, arbitration, and fault reporting for real-time controllers includes a method of validating redundant input and output signals and arbitrating between the redundant input and output signals by determining a fault severity level for each of the redundant input and output signals, and determining a signal to transmit for further processing based at least in part on the determined fault severity levels.

Methods and systems are provided by which a flexible, efficient and easy-to-use real-time enterprise management system is provided. The methods and systems provided can effectively monitor and manage the resources and events of each of a plurality of computers within a fluidly changing network environment (e.g. client/server and peer-to-peer networks). Also provided are methods and systems which allow an individual computer to determine whether or not its current performance characteristics vary...

A maintenance system of a hydraulic excavator (11) is provided with a maintenance monitoring device (21), a maintenance management server (12) for managing trouble information and operating information for each working machine, a model information server (13), and a service personnel mobile terminal (14) connected to one another through the Internet (15). When trouble occurs in the hydraulic excavator, the maintenance system (21) transmits trouble information to the maintenance management server...

A non-hardened processor is made fault tolerant to SEUs and SEFIs. A processor is provided utilizing time redundancy to detect and respond to SEUs. Comparison circuitry is provided in a radiation hardened module to provide special redundancy with the need to run additional processors. Additionally, a hardened SEFI circuit is provided to periodically send a signal to the process which, in the case of a processor not in the SEFI state, initiates production by the processor of a "correct" response....

The present invention extends to methods, systems, and computer program products for isolating the evaluation of actual test results against expected test results from the test module that generates the actual test results. A results evaluation sub-system receives actual test results resulting from the execution of a test in a test environment. A results retrieval sub-system receives environmental data indicating that a test was performed in the test environment. The results retrieval sub-system...