61results about How to "Eliminate single points of failure" patented technology

An automatic fault detecting and allowing method of high usable multicomputer system includes forming a logic virtual closed loop by member nodes in multicomputer system , realizing distribution mode of fault discovery through ring detection mechanism , realizing automatic fault isolation through logic ring self - healing mechanism , realizing system high usability through ring data back - up mechanism and ring task taking over mechanism , realizing system automatic restoration through ring task migration and logic ring self - healing mechanism , realizing on - line dynamic expansion and contraction of system processing ability through self - healing and task redistribution mechanism.

The invention belongs to the technical field of bipropellant propulsion systems, and provides a method for using bipropellants efficiently to use propellants effectively. By adding gas bypasses among high-pressure gas cylinders and storage tanks, following functions are achieved: improving propellant surplus measuring accuracy, controlling the parallel storage tanks actively to be discharged in balance; controlling a system mixing ratio actively; and serving as a function backup of a mechanical decompression branch, eradicating system single point failures, and improving the system reliability. The method for using bipropellants efficiently can be widely applied in various trussed satellites, and can be generalized to all satellites using the bipropellant propulsion systems to improve performances of bipropellant propulsion systems and in-orbit management capacities of bipropellant propulsion systems.

The invention discloses a degradable triple-modular redundancy computer system based on software synchronization, relates to a triple-modular redundancy computer control system, and solves the problem that the conventional triple-modular redundancy system is complicated due to addition of an arbitration module. The degradable triple-modular redundancy computer system consists of three same control computers, communication buses, high-speed communication buses and a power management module, wherein the synchronization information transfer and data exchange of the control computers are finished through the communication buses which are connected two by two; the control computers vote for sensor data and control operation results by using a 2-out-of-3 voting algorithm; high-frequency heartbeat monitoring signals of the computers are transferred by interconnecting the high-speed communication buses two by two, and real-time state mutual monitoring of the control computers is realized; the three control computers operate degradation programs, so the degradation operation of a redundancy system is realized; and the three control computers operate reconstruction programs, so the reconstruction operation of the redundancy system is realized. The arbitration module is not required to be added.

The invention provides a method for converting load balancing among nodes in a cluster storage system, and relates to the field of distributed cluster storage systems. DNS service configuration is introduced into the cluster storage system achieved based on CTDB, the same domain name is analyzed into virtual IPs provided for the outside by the CTDB in sequence, automatic load balancing is achieved through an IP load balancing mechanism of a DNS, and therefore when a client side has access to the storage system through the domain name, the problem that due to the fact that too many client sides have access to the same IP address at the same time under a simple IP address access mode, the load of the single node is too large can be solved, the resources of various conversion nodes can be used in a balancing mode, and DNS service single node failures are eliminated from the configuration of the server by the DNS.

The invention discloses a universal multi-mode redundant pico/nano satellite on-board computer system, and the system is used for solving the technical problem that the reliability of the conventional double-mode redundant microsatellite on-board computer system is low. The technical scheme of the universal multimode redundant pico/nano satellite on-board computer system is as follows: the system comprises a main-control computer module, a redundant control module, a data storage module, a bus scheduling module, a power supply module and an external interface, wherein the data storage module is used for ensuring that the important data cannot be lost, and the redundant control module is used for coordinating the working of the MCU of the main-control computer, so that the system can run under the three working modes namely the low power consumption mode, the cold/hot backup mode and the anti-radiation mode. When the system is in the low power consumption mode, the main calculation and the control instruction are completed by a low power consumption microprocessor, so that the power consumption of the system can be reduced; when the system is in the cold/hot backup mode, both low power consumption and high reliability can be realized. Compared with the double-mode redundant computer system, the system provided by the invention has the advantage that the single point of failure of the computer system can be eliminated to the utmost extent, and the reliability of the system can be improved.

The invention provides a distributed storage system-based NameNode switching method and a distributed storage system-based NameNode switching device. The method comprises: backing up storage data in a master NameNode to a slave NameNode in a preset data backup manner in order to complete the data synchronous storage process; detecting whether the master NameNode stops providing data services by the slave NameNode; and determining whether the virtual IP address connected with the master NameNode is to be switched and connected to the slave NameNode in accordance with the detection result. On the one hand, the technical solution can effectively eliminate a single point of failure in the existing Hadoop-based distributed storage system and improve the availability of the system; and on the other hand, when the master NameNode fails, the master NameNode can be quickly switched to a backup NameNode, which effectively shortens the time of NameNode service restoration so that NameNode can provide services in real time, thus improving the stability of the distributed storage system.

The invention relates to a circuit and topology for a high-reliability power electronic device system. The circuit and system topology comprising a plurality of controller units (20) is configured into a power system (10) providing high reliability. The controller units (20) control a subsystem and equipment so that the high-reliability power system (10) can also maintain running after the controller units (20), the subsystems (14) and (16) and the equipment (12) have failure.

The invention relates to a distributed access control method based on a block chain, and belongs to the field of information security. The method comprises the following steps: designing a distributed access authorization process: designing the distributed access authorization process according to the functions of each component in a distributed access control model B-ABAC based on a block chain; meanwhile, in the authorization process, recording generated authorization access records on the block chain; S2, designing an attribute and strategy intelligent contract: separating functions of attribute authority and strategy authority, and dispersing the functions into an intelligent contract and a block chain account book in the B-ABAC model; and S3, designing consensus algorithm: using the distributed decision network to replace original decision points, and designing and using the improved consensus algorithm to carry out consensus maintenance on the distributed decision network. In an untrusted environment, fine-grained and dynamic access authorization can be provided, meanwhile, the security and auditability of an access model are improved, and human intervention in the authorization process is reduced.

The invention discloses a triple modular redundancy computer clock synchronization method and a system thereof. The triple modular redundancy computer clock synchronization system comprises three CPUsub-modules and a dual-redundancy MCU clock configuration unit; every two of the three CPU sub-modules are connected through a three-computer data exchange/synchronization/voting channel; the dual-redundancy MCU clock configuration unit is respectively connected to the three CPU sub-modules through clock feedback channels; the dual-redundancy MCU clock configuration unit is further connected to the three CPU sub-modules through an I2C bus. The method and system provided by the invention have the technical effects that the clock output value is directly compensated and debugged through clock count value feedback, the compensation precision is high, a redundant structure is adopted internally, and no single-point failure link exists in the clock synchronization system and the reliability ishigh.

The invention discloses a voting method based on a dual-channel voting system. When voting starts, an A channel main control computer sends a voting starting command to a B channel main control computer; the A channel main control computer and the B channel main control computer send the voting command to corresponding channels of dual-channel controllers to be in a voting state, and the dual-channel controllers collect key information and send the key information to the main control computers; the A channel main control computer and the B channel main control computer receive voting data sentby the respective channels and forward the received voting data to each other; the A channel main control computer and the B channel main control computer process the voting data of the two channelsrespectively, merge the processed data and count and display the merged data; and when voting terminates, the A channel main control computer sends a voting terminating command to the B channel main control computer, then the A channel main control computer and the B channel main control computer sends the voting terminating command to the corresponding channels of the dual-channel controllers, and voting is finished. According to the voting method, two real-time on-line complete voting links which backup each other are formed, area isolation is achieved on the premise of forming systems separately, common network attacks can be defended, and the robustness and the stability of an overall network system are enhanced.

The invention discloses an intelligent multi-architecture fusion type secure desktop cloud system, which is based on a multi-architecture fusion type autonomous controllable cloud computing platform and a centralized management and control online vocational education and office information system, wherein the multi-architecture fusion type autonomous controllable cloud computing platform is based on autonomous controllable, safe and reliable KunPeng, Loongson/Zhaoxin, Feiteng and Kylin chip processors and a domestic operating system. The system is characterized by comprising a quantum security desktop cloud terminal unit or desktop cloud terminal unit, a cloud resource pool unit, a cloud management platform unit and a security authentication auditing mechanism unit. The invention has the beneficial effects that the system integrates and unifies VDI, IDV and VOI mirror images, and introduces an RDS mode, so that the problem that different and different hardware configurations of various user scenes in different industry fields start a proper cloud desktop is solved, and the resource waste of customers is reduced. Meanwhile, according to the hardware configuration of the user, the appropriate cloud desktop is automatically allocated, the user does not need to think which kind of cloud desktop is used, time and labor are saved for the user, and resources are saved. And the stability of cloud desktop connection is improved, and the user experience can be effectively improved.

The invention discloses a dual-active disaster recovery system with a read-write separation function. The dual-active disaster recovery system comprises a network layer, an application layer, a data layer and a storage layer which are sequentially cascaded, wherein the network layer provides a channel for a user to access a service system; the application layer dynamically displays all software and hardware resource states and the alarm information in the system in a unified interface through the unified graphical interface; the data layer comprises two active data centers which are used for carrying out the unified organization and management on business data; and the storage layer is used for providing storage, synchronization and copying functions. According to the system, the redundantstandby resources are utilized to construct a layer-by-layer dual-active disaster recovery system with a main data center at the network layer, the application layer, the data layer and the storage layer remotely, and meanwhile, the read-write separation of the main data center and the standby data center is realized by utilizing a read-write separation cluster, so that the load of the main datacenter is reduced.

The invention relates to an integrated video monitoring cloud service system and method based on a railway video technical specification. The cloud system comprises a core layer, an area layer and anaccess layer, wherein the core layer comprises a core node, and the area layer and the access layer respectively comprise a plurality of nodes; each of the nodes comprises a collection terminal, an access server, a distribution server, a storage server and a management server, the management server comprises a main server and a standby server, and the collection terminal, the access server, the distribution server and the storage server are all deployed in a cluster mode. By adoption of the integrated video monitoring cloud service system and method provided by the invention, the problem of complicated upgrade and capacity expansion is solved, as a dynamic routing mode and the cluster deployment mode are adopted, no complex routing configuration work is required during system capacity expansion, and the capacity expansion can be completed just by adding the nodes of access service, distribution service or store service, so that the upgrade and capacity expansion works are greatly simplified.

The invention relates to a vehicle control system based on redundancy reconfiguration and a control method, belongs to the technical field of vehicle-mounted equipment communication and control, and solves the problems that the single-point failure risk exists in an existing vehicle control system, a control instruction and a query instruction sent by the comprehensive processor equipment of the system are outputted to the terminal controller equipment through gateway controller equipment and network bridge equipment; the comprehensive processor equipment comprises a first processor and a second processor which are mutually backed up; the gateway controller equipment comprises a first gateway controller and a second gateway controller which are mutually backed up; the network bridge equipment comprises a first network bridge and a second network bridge which are mutually backed up; the first processor, the second processor, the second gateway controller, the second network bridge, the first network bridge and the first gateway controller are respectively used as network nodes and are sequentially connected to form a bidirectional ring network. The system redundancy is increased, the overall reliability is improved, and the communication network rate and bandwidth of the whole vehicle are improved.

The invention discloses a method for improving the availability of a DB2 DPF. The method is used for the DPF including N nodes and comprises steps of: allocating NAS network storage to the N nodes in order that a sqllib control file in the DPF is stored in the NAS network storage; creating M failed resource sets; dividing the N nodes into M groups; configuring partition resources corresponding to M groups of nodes to the M failed resource sets one to one; and when any one of the N nodes is faulted, transferring the failed resource set corresponding to the faulted node to any other normally-operating node. An application of a client may acquire the partition resource corresponding to the faulted node by accessing the node provided with the failed resource set corresponding to the faulted node, thereby guaranteeing that data service can be still normally provided for an external unit when a single node is faulted and improving the availability of DPF.

The invention discloses a method and a device for selecting gateways in a base station system. The gateways are used for forming network links between a base station and a base station controller. The method comprises the following steps: in at least two pre-configured gateways, determining whether a preferred gateway exists; if the preferred gateway exists, determining other gateways as alternative gateways; and when the preferred gateway is valid, selecting the preferred gateway as a link gateway, otherwise, selecting a valid alternative gateway as the link gateway. The device comprises a preferred gateway determining module and a link gateway selecting module, wherein the preferred gateway determining module is used for determining whether the preferred gateway exists in the at least two pre-configured gateways; and the link gateway selecting module is used for determining other gateways as alternative gateways if the preferred gateway exists, selecting the preferred gateway as the link gateway when the preferred gateway is valid and selecting the valid alternative gateway as the link gateway when the preferred gateway is invalid. The method and the device can maintain a communication link accessible in a plurality of gateways and improve system stability and reliability.

The invention relates to a multi-path transmission data bus redundancy synchronous communication method, in particular to a 1553B bus controller interface redundancy method for a multi-mode redundancycomputer, and aims to solve the problem that the working state recovery time is too long when the 1553B bus controller interface of the existing multi-mode redundancy fault-tolerant computer is subjected to single-point and reconstruction recovery, and can expand redundant fault-tolerant systems of various machine types. A single machine where each CPU is located is provided with an independent bus communication chip, and a 1553B bus working mode is configured to be a BC mode and is accessed to a bus communication network; the communication mechanism comprises that only one terminal is required to control the bus system at any moment, that is, only one active BC is available on the bus at any moment, wherein the minimum unit of the 1553B communication sequence is a message, the instruction word in the message is BC sending, the state word is RT sending, and the message transmission sequence determines that RT feedback is not received if the BC is not sent; wherein the interval time for the RT to respond to the valid instruction words is 4-12 us, the minimum response-free timeout is 14 us, and the RT response starts to be detected 2 us after the BC sends the words.

The invention discloses a method for operating a laboratory system. A method for operating a laboratory system comprising laboratory instruments and a laboratory information system is presented. The method comprises grouping laboratory instruments into instrument cluster(s) and providing a cluster manager thereto. The plurality of laboratory instruments publishes their instrument resource descriptions. Each cluster manager maintains an inventory of cluster resources and publishes a list of processing capabilities of the instrument cluster. The laboratory information system assigns processing of test order(s) to instrument clusters. Each cluster manager assigns resources of the laboratory instruments corresponding to test orders from the laboratory information system in view of the inventory of cluster resources. Each laboratory instrument carries out the processing step(s) on the biological sample as instructed by the cluster manager.