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7617411 |
Cluster system and failover method for cluster system
Provided is a failover method for a cluster system for realizing smooth failover of the guest OS's, even when there are many guest OS's, while reducing consumption of computer resources of a...
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7613961 |
CPU register diagnostic testing
One embodiment disclosed relates to a method of compiling a program to be executed on a target central processing unit (CPU). The method includes opportunistically scheduling diagnostic testing of...
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7613948 |
Cache coherency during resynchronization of self-correcting computer
A fault-tolerant computer uses multiple commercial processors operating synchronously, i.e., in lock-step. In an exemplary embodiment, redundancy logic isolates the outputs of the processors from...
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7610509 |
Fault tolerant computer system
A fault tolerant (FT) computer system includes a first system; and a second system configured to operate in synchronization with the first system. Each of the first and second systems includes a...
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7610405 |
Router software upgrade employing redundant processors
Systems and methods for replacing software controlling active routers while minimizing impact on network operation are provided by virtue of one embodiment of the present invention. The software...
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7607040 |
Methods and systems for conducting processor health-checks
Systems and methods for conducting processor health-checks are provided. In one embodiment, a method for evaluating the status of a processor is provided. The method includes, for example,...
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7603580 |
Redundant manager for a storage system
A method for managing activity of a data storage system, including at least partly managing and performing an operator interaction with the storage system using a first processing system, and...
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7594054 |
Data bus interface for a control unit, and control unit having a data bus interface
A data bus interface for a control unit, in particular for a motor vehicle control unit is described, as well as a control unit, in particular a motor vehicle control unit, having a data bus...
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7590760 |
Hybrid interface synchronization method and driver-client model for high availability systems
A system and method for supporting a “hitless” switchover from an Active to a Standby processor uses a hybrid synchronization of interface states to allow applications that have been modified...
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7590727 |
System and method for software failover on a bladed system
A system for managing software failover on a bladed server is provided. The system includes a plurality of bladed servers, including a first bladed server and a second failover bladed server. The...
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7590719 |
System and a method for blocking off processors when communication paths between adapters and a cache memory are determined to be secure
The invention relates to exchanging micro programs in a storage device, automatically, without halting operation. In one embodiment, the path adapters of a host computer are connected to the...
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7587632 |
High availability, high performance software component architecture
A high availability, high performance software component architecture includes a primary configuration and at least one secondary configuration to take over from the primary configuration in the...
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7584388 |
Error notification method and information processing apparatus
An error notification method notifies errors generated in first and second processor systems to each processor within the first and second processor systems, in a computer system that includes the...
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7577870 |
Method and system for controlling command execution
Method and system for performing a task in a control system is provided. The method includes, transmitting a command to a governing agent; re-transmitting the command from the governing agent to a...
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7577869 |
Apparatus with redundant circuitry and method therefor
An apparatus with circuit redundancy includes a set of parallel arithmetic logic units (ALUs), a redundant parallel ALU, input data shifting logic that is coupled to the set of parallel ALUs and...
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7570377 |
Image processing apparatus
The state of an HDD provided in an image processing apparatus is divided into a plurality of levels and information is given to call user's attention when the state of the HDD is set at a level...
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7565568 |
Method and system for virtualization switch failover
A method and system for virtualization switch failover is disclosed. According one embodiment of the present invention, a failure of a first virtualization device within storage a area network...
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7562253 |
Segmented protection system and method
A segmented protection system and method. The invention comprises a plurality of Processing Modules arranged in series along a Protection Bus. A number of Protection Groups may be formed along the...
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7561944 |
High integrity and availability multi-channel systems
Systems and methods for asynchronous multi-channel data communications are provided. In one embodiment, a system in accordance with the invention includes a plurality of redundant pairs of computer...
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7555353 |
Input device of safety unit
This invention provides an input device of safety unit which enables an error diagnosis result referred to in a process of input processing for generating a control data from raw input signal to be...
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7552359 |
Computer system and method for dealing with errors
A computer system includes a plurality of systems configured to be connected to each other by links and to operate synchronously each other. Each of said plurality of systems includes a fault...
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7549082 |
Method and system of bringing processors to the same computational point
A method and system of bringing processors to the same computational point. At least some of the illustrative embodiments are computer systems comprising a first processor executing a program, a...
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7543180 |
Enhancing throughput and fault-tolerance in a parallel-processing system
One embodiment of the present invention provides a system that enhances throughput and fault-tolerance in a parallel-processing system. During operation, the system first receives a task. Next, the...
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7539898 |
Method of increasing system availability by assigning process pairs to processor pairs
A method is provided of assigning processors in a multiprocessor environment to a plurality of processes that are executed in the multiprocessor environment. Each process has a process pair defined...
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7539897 |
Fault tolerant system and controller, access control method, and control program used in the fault tolerant system
The present invention has been made to realize access processing performed in accordance with synchronous/asynchronous state between processors in a fault tolerant system. In two systems that...
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7539755 |
Real-time heartbeat frequency regulation system and method utilizing user-requested frequency
A system and method for regulating real-time the heartbeat frequency of the host according to the user-requested frequency, wherein the heartbeat frequency of the host is regulated through the...
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7536590 |
Programmable controller, programmable controller system, CPU unit and method of starting duplexed operation
A programmable controller has a first (executing) CPU unit and a second (standby) CPU unit for a duplexed operation. Each CPU unit stores CPU version indicating its functionality and function...
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7536589 |
Processing apparatus
A processing apparatus includes a plurality of operation units each of which performs a given operation for an input operand in accordance with an operating instruction and outputs an exception...
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7526673 |
Parallel processing system by OS for single processors and parallel processing program
In a parallel processing system by an OS for single processors which operates an OS for single processors and an existing application for single processors on a multiprocessor to realize parallel...
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7523347 |
RAID control apparatus, and RAID control program and RAID control method
A RAID control apparatus is able to cooperate with another RAID control apparatus to control at least one RAID apparatus. The RAID control apparatus comprises a diagnosis unit and a control unit....
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7519856 |
Fault tolerant system and controller, operation method, and operation program used in the fault tolerant system
There is provided a fault tolerant system capable of adequately performing error processing, synchronization processing, and resynchronization processing for realizing a fault tolerant function in...
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7516359 |
System and method for using information relating to a detected loss of lockstep for determining a responsive action
According to one embodiment, a method comprises detecting a loss of lockstep (LOL) for a processor module. The method further comprises determining a type of LOL that is detected, and, based at...
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7516358 |
Tuning core voltages of processors
A method, apparatus, and system are disclosed for tuning core voltages of processors. One embodiment is a method for software execution. The method includes varying core voltages of plural...
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7515975 |
Technique for switching between controllers
A controller design for switching between m linear multivariable controllers each of whom stabilizes a linear plant has been presented. A Youla-Kucera factorization was exploited in the interest of...
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7512727 |
Redundant control system having a peripheral unit for an automation device
There is described a periphery unit for an automatic device, which can be actuated as an analog input and as an analog output. A number of connections which are to be used as inputs and the number...
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7502957 |
Method and system to execute recovery in non-homogeneous multi processor environments
Disclosed are a method and system for parallel execution of recovery in a non-homogeneous multi-processor environment. The method defines criteria how to decide which recovery actions are to be...
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7502956 |
Information processing apparatus and error detecting method
An information processing apparatus includes a plurality of computing units. At least one of the computing units includes a recording unit that records a status of an error occurrence in each of...
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7502954 |
High availability data storage system
A data storage system includes a disk drive array including a plurality of disk drives; a first storage processor for controlling the operation of the data storage system; a second storage...
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7500139 |
Securing time for identifying cause of asynchronism in fault-tolerant computer
A fault-tolerant computer has a pair of duplex systems having respective CPU subsystems that are operable identically in lock-step synchronism. Each of the duplex systems has a CPU, a main storage...
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7496782 |
System and method for splitting a cluster for disaster recovery
The present invention provides a system and method for disaster recovery split of a node from a cluster to enable cluster management operations using quorum-based data replication services to...
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7493618 |
Fault tolerant mutual exclusion locks for shared memory systems
The present invention provides a method of implementing a fault-tolerant mutual exclusion lock. The present invention records in a lock structure the IDs of all processes whose failure can lead to...
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7493517 |
Fault tolerant computer system and a synchronization method for the same
Each time a sync controller sequentially issues a read request to a memory controller, a count value of a first counter is incremented. When a read operation is conducted for the read request, a...
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7493516 |
Hardware-error tolerant computing
Embodiments include a computing system, a device, and a method. A computing system includes a processor subsystem having an adjustable operating parameter. The computing system also includes an...
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7493515 |
Assigning a processor to a logical partition
Assigning a processor to a logical partition in a computer supporting multiple logical partitions that include assigning priorities to partitions, detecting a checkstop of a failing processor of a...
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7487380 |
Execution recovery escalation policy
Deterministic code execution may be recovered for programs or portions thereof by implementing a programmable policy on a system host to escalate the scope of a code discard based on various...
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7484131 |
System and method for recovering from a hang condition in a data processing system
A data processing system, method, and computer-usable medium for recovering from a hang condition in a data processing system. The data processing system includes a collection of coupled processing...
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7480827 |
Fault tolerance and failover using active copy-cat
Fault tolerant operation is disclosed for a primary instance, such as a process, thread, application, processor, etc., using an active copy-cat instance, a.k.a. backup instance, that mirrors...
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7480816 |
Failure chain detection and recovery in a group of cooperating systems
A cluster or group of cooperating systems may implement failure chain detection and recovery. The group may include multiple nodes and each node may include a group management services (GMS) module...
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7480815 |
Controller communications over an always-on controller interconnect
A controller interconnect structure within a RAID disk array enables continuous low latency/high bandwidth communications between a plurality of controller pairs within the array. Mirror buses...
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7478274 |
Duplex system
A duplex system has duplicated processor devices. Each of the processor devices has a first copying section which writes data written in a memory of the processor device, into a same address of a...
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