271results about How to "Avoid single point of failure" patented technology

The invention provides a distributed timed task execution method and system, can realize distributed cluster execution of timed tasks, and can completely solve the problem of single-point failure and task repetitive execution, and thus the system availability is high. The distributed timed task execution method comprises the following steps: a system cluster module keeps long connection with registered server nodes and generates a server list; a task distributing module distributes a server to each received timed task according to the server list and stores the binding relationship between the timed tasks and the servers to a database; a task loading module periodically scans a timed task table in the database and loads the timed tasks about to be executed in the period to the server, and establishes a timed task; and a task execution module executes the timed task.

The invention relates to a public key infrastructure system based on a block chain, and a certificate management method thereof. The public key infrastructure system comprises a user u, a plurality ofCAs, a plurality of block chain maintainers BLM, a block chain and a client, the user u sends a signature request to the plurality of CAs, the plurality of CAs separately perform signature and feed back the same to the user u; the user u merges the signatures in a singed certificate issue affair and sends the same to the block chain maintainers BLM; the block chain maintainers BLM verify and store the signatures in candidate blocks of the block chain, and send proves of existence of the singed certificate issue affair CI-signed to the user u; and the client requests a certificate from the user u, the user u replies the domain name and the block chain maintainers BLM, and the client sends a query and verification request to the block chain maintainers BLM to query the state of the certificate and make response. By adoption of the public key infrastructure system, simple, convenient and efficient management of the certificates are achieved, and the problem of single point fault of CA can be avoided.

The invention discloses a method for realizing cross-management-domain identity and permission information sharing. Various authoritative institutions establish a management information sharing blockchain system together; each authoritative institution constructs a block chain node, participates in establishment of the block chain system, and backs up a block chain ledger; the management system of each authoritative institution is docked with the own block chain node, so that the block chain node is controlled to operate a block chain; in an individual cross-domain access process, the management systems of the authoritative institutions and the block chain nodes perform mutual negotiation; and the management systems of the authoritative institutions perform mutual negotiation. According to the method for realizing cross-management-domain identity and permission information sharing disclosed by the invention, the traditional point-to-point cross-domain management information sharing disadvantages are evaded; credible distributed storage and updating of identity permission management information and behaviour records can be realized; a unified query channel of individual identity permission and behaviour records is provided for the management system of each authoritative institution; and a support is formed for settlement among the management systems of the authoritative institutions.

The embodiment of the invention provides a gray scale issuing control method which comprises the steps that a first server receives a first service using request sent by a user terminal, and parameter information in the first service using request is extracted; according to the parameter information and preset gray scale configuration information, whether the user terminal is allowed to use first service is judged; if yes, first service is provided for the user terminal; and otherwise, the user terminal is informed to send a second service using request to a second server, and first service and second service provide different service contents corresponding to the same service respectively. In addition, the embodiment of the invention further provides a gray scale issuing control device and system. Gray scale issuing control flexibility can be effectively improved, and the control cost of gray scale issuing is lowered.

The invention relates to a fault recognition and processing method based on a satellite-bone bus. The method of the invention comprises the following steps: firstly, determining the fault type of a satellite, telemetry parameters related to various fault types and a range of normal values of the parameters; then setting the maximum times that the telemetry parameters related to the various fault types exceed the range of the normal values, and storing security instruction groups for removing faults corresponding to the various fault types in an instruction library; collecting the telemetry parameters of each device of the satellite by the satellite-bone bus at a set time, and when the telemetry parameters related to a fault type are abnormal and the abnormal times exceed the set maximum times, judging and entering the fault type; obtaining the corresponding security instruction group from the instruction library, and judging whether the security instruction group is executed; if the security instruction group is executed, clearing the corresponding abnormal count values of the telemetry parameters until the execution of the security instruction group is finished; and if the security instruction group is not executed, sequentially executing every security instruction in the security instruction group until the execution of the security instruction group is finished. The invention has the characteristics of good real-time performance and strong versatility.

The invention discloses network type detecting method and system. It includes the following steps: loading public network; selecting public network nodes which has two IP addresses; sending request packet to the first or second nodes by STUN protocol; replying the response packet; confirming the network type. The invention can make the user detect the network type without STUN server which can greatly reduce hardware cost, avoid single point of failure.

The invention discloses a data processing method of a database. The data processing method comprises the following steps that a main node servo receives a data processing request of a client, wherein the data processing request comprises a data storage request; the main node server receives data to be stored; the main node server extracts various field values of one field of the data to be stored, calculates corresponding hash values and determines a storage position corresponding to each hash value; the main node server transmits the data to be stored and the hash values to a data node server; the data node server stores line data corresponding to the hash values into a corresponding main hard disc; and the main node server carries out mirror image back-up on the data stored in the data node server, wherein the data processing request also comprises data retrieval requests. The data processing method of the database, disclosed by the invention, is high in data processing efficiency and larger in capacity, and avoids the happening of single-site faults in a cluster.

The invention discloses a keyless shared automobile system based on a blockchain technology and a construction method thereof. The system comprises an application layer, a blockchain layer, a data storage layer and a physical layer; the application layer comprises a user management module, a vehicle management module and an order management module; the blockchain layer consists of several connected blocks, and includes a smart contract template for performing user information registration and order contract terms; the data storage layer is used for storing user information, automobile information and order information, and hash values and storage locations of three information raw data are stored by the blockchain layer; the physical layer includes a mobile terminal and an automobile terminal, a user sends an unlock request through the mobile terminal, the automobile terminal includes am automobile networking system and an automobile smart lock, the automobile smart lock is used for unlocking, and the automobile networking system is used for recording and uploading driving data. The system enables an owner and a renter to complete the issuance and receipt of an order through the smart contract without the need of third party participation, and reduces the transaction cost.

The invention discloses a method and a system for monitoring service states of cloud storage cluster nodes in real time. Each cluster node is provided with a service state acquirer. The method comprises the following steps that the service state acquirers acquire service state information in the cluster nodes where the service state acquirers are located, process the service state information into a unified format, and report the service state information to a service monitoring processor, wherein the service state information comprises service running state information and service availability state information; the service monitoring processor collects the service state information reported by all the service state acquirers, performs data encapsulation on the service state information to form monitoring information, and externally publishes the monitoring information through a corresponding API (Application Program Interface). According to the method and the system, service running states and service availability are simultaneously monitored through the service state acquirers, so that the monitoring performance of the system is improved, and high availability of cloud service is ensured; the monitoring information is externally published in real time through the corresponding API, so that the extensibility of the system is enhanced.

The invention discloses a task scheduling cloud processing system and method. The system comprises a management console, a plurality of task scheduling cloud service nodes and a log database for storing a running log, wherein each task scheduling cloud service node is equipped with a task scheduling resource recognizer, a control command executor, a fault migration monitor and a running log recorder; by using the technical scheme, the cloud processing system has the advantage of a soft fault migration function without the hot backup of double servers and multiple servers in task scheduling; therefore, the single-point fault of the system is avoided, and the cost is saved.

The invention discloses a crowdsourcing resource distributed anonymous allocation method based on a block chain and an allocation system thereof, hereinafter referred to as a crowdsourcing resource anonymous allocation system, comprising the following steps: user registration; linking the user registration information; creating a task release intelligent contract on the block and recording task release information; making a plan on the premise of the service node; enabling the request node to select the most excellent service node from the achievement of the plan; and creating a Hash time locking contract on the block and establishing an onion route to realize anonymous communication of the two parties of the transaction. According to the invention, the Hash time locked smart contract is introduced into the block chain network, zero confirmation transaction chaining is realized, and the transaction amount in unit time is greatly improved. In addition, an onion route from the request node to the service node can be constructed through a payment channel established by the Hash time locking contract, so that anonymous transactions of the request node and the service node are realized.

The invention discloses a consortium blockchain node hot-standby switching method. The node hot-standby switching steps are specifically as follows: a candidate node establishes connection with a consensus node; the consensus node sends network configuration thereof and consensus routing table information thereof to the candidate node in real time so as to perform standby; the candidate node performs fault detection on the consensus node and decide whether to trigger the node upgrading replacement process; the candidate node is online upgraded as the consensus node and connects with the consensus node of a block chain network according to the standby network configuration, and the own consensus state is initialized to a state in a downtime of the consensus node, thereby accomplishing the replacement. Through the method disclosed by the invention, the consensus node of the mechanism is in abnormal downtime in the consortium blockchain network composed of multiple mechanism in participation; in the premise of not importing the artificial operation, the operation of online upgrading the consensus node on the candidate node line can be automatically accomplished, on the basis of guaranteeing that the block chain network consensus efficiency cannot be affected, and the single-spot fault of the consensus node in the mechanism is avoided.

This invention discloses one terminal device, which comprises net card match unit, fault test unit and multiple card set unit connected to fault test unit. The invention also discloses one network load sharing system with multiple terminal device comprising multi-terminal device and multiple routers and broadcast network. The terminal device is connected to routers through network card connecting to wide network. This invention also discloses one multi-terminal device network loading method, which comprises steps of setting address information and then sending data by terminal device through multiple routers.

The invention provides a distributed storage system and a method for storing backup data, which uses a distributed storage system mode instead of an index mode to manage the backup data. A distributedstorage method includes a method for storage of backup data, a method of data recovery and a method of backing up data garbage collection. The data storage method can greatly utilize the advantages of high IOPS of disk device and high concurrency of cluster, the system design has redundancy, the system will not easily collapse, and saves a lot of environment of optimizing the backup server's owndata, which is convenient for system administrator to carry on system management and saves the authorization cost of the database. And different from the traditional backup system index management, itdoes not need to simulate the tape to manage the file system space, so that the data can be recovered in time when it is invalid, which improves the utilization of storage spa ce.

The invention discloses an intelligent energy-saving system for controlling the wireless internetworking of office building environment, which comprises a central controller and area control subsystems. End control equipment is arranged in each area control subsystem; the central controller is connected with a wireless coordinator; each end control equipment is in signal connection with a wireless routing controller which is in signal connection with the wireless coordinator; and the end control equipment, the wireless routing controller and the wireless coordinator are all based on a ZigBee communication protocol and meet IEEE802.15.4 standard. The intelligent energy-saving system solves the technical problem that a relatively larger measurement and control network cannot be formed in a conventional wireless control system, also solves the problems of the high power consumption, low rate and high cost of the conventional building intelligent control system, ensures that manual control is effective when equipment communication or control is at fault and avoids the paralysis of the whole system.

The invention provides a triple-redundancy 1553B bus dynamic switching method, which includes the following steps: S1, a triple-modular redundancy bus network computer system architecture is built; S2, a redundancy bus configuration method is designed, a bus A for communication is a main bus by default, a first redundancy module is a on-duty module by default when the computer system is powered on, a first bus chip is configured in a BC mode, and a second bus chip and a third bus chip are configured in an MT mode; S3, a bus fault diagnosis method is designed for triple-modular bus real-time fault identification; and S4, a triple-redundancy bus mode composed of a BC mode and two MT modes is reestablished according to the on-duty module switching principle. A spacecraft computer requiring high real-time performance and reliability can determine a triple-redundancy bus fault by using the serial timing characteristic and the information monitoring function of buses. The method is easy to implement, runs reliably, is not affected by the external environment, is quick, and can be easily used in engineering.

The invention discloses a method for business dispatching and a system as well as a device applied to business dispatching. The method comprises the steps of: receiving a request for using WEB business initiated by a WEB client terminal and carrying out authentication to the request; if passing the authentication, requesting for WEB engine selection information of a user corresponding to the WEB client terminal and aiming at the WEB business to a control strategy unit, and then selecting a business content processing unit which provides service for the user corresponding to the client terminal according to the WEB engine selection information; and controlling the selected business content processing unit to access WEB resources and provide WEB business to the WEB client terminal. The method for business dispatching and the system as well as the device applied to business dispatching are capable of extending business volume based on business requirements and realizing fine grit and overall control process of the business.

The invention provides a method for optimizing the performance of a disk database by the memory database technology. Memory database and middleware applications are installed and allocated on a server with a large memory configuration, hotspot data stored in the disk database, including read-only data and readable and writable data, are cached in a memory unit, and a corresponding data synchronization mode is configured to automatically synchronizing the varying data in the memory unit to the disk database, therefore, the reliability of data is ensured. By the memory database technology, the hotspot data stored on the disk are ached in the memory unit and meanwhile the application is modified to configure the original data request to the memory unit instead of the disk, although the operation of the disk is changed into the operation of the memory unit. Therefore, the I / O bottle neck in the conventional disk database system is eliminated and the performance of the system is greatly improved.

The invention discloses a distributed industrial data distribution method based on a DDS. The method comprises the following steps: S1, creating a device interface file for each abstract device; S2, creating a subscription and issuing relation mapping table, and building a mapping relation between a data subscriber and a data issuer and the mapping relation between the data subscriber and a DDS theme; S3, creating a real-time database; S4, acquiring interface data of the data issuer and issuing the interface data in a network through a form of the DDS theme; S5, decoding the DDS theme data andwriting the decoded data into the real-time database; S6, reversely finding out the data issuer corresponding to the DDS theme according to the subscription and issuing relation mapping table, and calling a device interface of the data subscriber to notify the data subscriber to read the DDS theme data. With the method provided by the invention, software interfaces of industrial sensors are unified, consistent data acquisition and output processing is realized, and integration of the sensors, miniature devices, virtual devices and non-standard devices of different models and different types is facilitated.

The invention discloses a scalable file distribution method used in a distributed system which comprises a management server and at least one host computer and adopts the scalable file distribution method for file distribution. The management server is in charge of scalability management of all host computers of the whole network, can control each host computer to select one address, from an address pool, for downloading a specified scalable file according to the predefined distribution strategy and scalability dispatching algorithm, and conducts installation upgrading for application programs on the host computers. The host computers inform the management server of the access addresses of locally downloaded scalable files, and the management server allows other host computers to access the addresses to download the scalable files. Each host computer can not only download the scalable files from other host computers but also serve as a download server to provide download service for other host computers. The scalable file distribution method can be used by any distributed systems including a cloud system, effectively prevent the management server from bottlenecks, makes the best of resource capabilities of all servers in the whole network, and can quickly achieve file distribution in a controllable manner.

The invention relates to an application service system for monitoring a power charging-exchanging station and an interprocess communication method. The system comprises a service request end, a service supply end and an application service bus, wherein the service request end is used for putting forward a service request from the application service bus; the service supply end is used for supplying service corresponding to the service request sent from the application service bus; the application service bus is used for managing the application service, interaction and processing of information, and monitoring the operation conditions of each node and conducting corresponding control; and the service request end and the service supply end are respectively in communication connection with the application service bus through a service bus adaptor and a bus standard interface. The application service system realizes plug and play to various components conforming to soft bus interface standards and is easy for integration and customization of a large-scale software system; the standardization of component interfaces gives rise to hardware or industrialization of production, therefore the production efficiency is increased; and redundancy deployment of double application service buses is adopted, the performance bottleneck of single bus load is broken through, single-point failures are overcome and the applicability of the system is enhanced.

The embodiment of the invention provides a key management method based on a block chain in a CCN. The method comprises the following steps: a user creates an authentication transaction, wherein the authentication transaction comprises a user's public key hash and a user's signature; the user sends the authentication transaction to the trust domain administrator of the trust domain to which the user belongs for authentication application; the user receives the block height of the authentication transaction sent by the trusted domain administrator and writes the block height into the public keypackage together with the transaction hash. Based on the scheme, the invention realizes a decentralized key management mode, and adopts a block chain to store the public key hash of a user in a trustdomain, thereby effectively ensuring the authenticity and integrity of the user's public key. The embodiment of the invention also provides a key management device based on a block chain in a CCN anda computer-readable storage medium.

The invention discloses P2P flow optimization method and system based on a distributed index server architecture. The method comprises the following steps of: on the basis of the P4P concept, partitioning the network into regions and deploying policy servers and positioning servers by an Internet service provider, and deploying index servers in each region by a P2P content provider; positioning the affiliated region and the local index server by a terminal in each region; when possessing new resources, reporting information of the new resources to the local index server by the terminal in each region, and maintaining index information established by the information of the new resources by the index server and acquiring policy matrix information by the aid of the policy server; downloadinga seed file from a seed server by the terminal and transmitting request index information to the local index server according to the hash value in the seed file, and proportionally returning the index information to the terminal by the local index server according to the policy matrix; and getting connection with the corresponding terminal by the terminal according to the returned index information and downloading the resources.

The invention relates to a method for dynamically distributing broadcast shared resources. The method comprises the following steps of: a step of distributing and scheduling the shared resources; a step of logically checking; a step of normally broadcasting; and a step of changing shared program information. According to the invention, a mode of carrying out centralized control by a medium video recorder is adopted to complete broadcasting of each channel under the urgency and emergency conditions; and compared with a conventional scheme of separately configuring medium play equipment for each channel, the method has the advantage of saving the investment of equipment resources. Moreover, due to the adoption of the uniform scheduling and control of the shared resources, the dynamic distribution of the resources is implemented, the using efficiency of the equipment is effectively improved, the system investment is reduced, the aim of balancing an equipment load is fulfilled and the service life of the equipment is prolonged.

The invention discloses an overall situation primary key generation method and system under a distributed database and relates to the field of databases. According to the overall situation primary key generation method and system under the distributed database, through the building of a primary key server cluster, a main primary server in the cluster performs sorting on a plurality of primary key application requests and synchronizes results to other primary key servers in the cluster, primary key generation is separately executed by a plurality of key servers in the cluster, and all the primary key servers generate an overall primary key based on the synchronous primary key application requests. So that the strong consistency of the primary key is maintained, the orderliness and the continuity of the overall primary key are guaranteed, and meanwhile the problems of the single point of failure and the performance bottleneck of the primary key generation can be avoided.

The invention discloses a small air pillow pressurization system. The redundancy design is adopted in the system, and pressurizing magnetic valves are controlled by feedback of storage box pressure under the set timing sequence condition. At the initial stage of starting of an engine, a pressurization controller controls the main pressurizing magnetic valve and the auxiliary pressurizing magnetic valve and monitors the pressure inside a storage box, when the pressure is excessively low, the pressurization controller controls the main pressurizing magnetic valve or the auxiliary pressurizing magnetic valve to be opened and carry out emergent pressurization on the storage box, and therefore the phenomenon that the engine works abnormally due to the fact that the air pillow pressure of the storage box is reduced fast is avoided, the engine can be started smoothly, the single point of failure is avoided, and the reliability of the pressurization system can be effectively improved.

The invention relates to the technical field of a computer and specifically provides a realization method and performance system for distributed timed tasks. The performance system for the distributed timed tasks comprises a plurality of nodes, wherein the plurality of nodes share the same database; each node is equipped with a task performance module and a heartbeat monitoring module; the task performance module is mainly responsible for performing the tasks and updating task states; and the heartbeat monitoring module is mainly responsible for updating heartbeat time and resetting the states when task performance is abnormal. Compared with the prior art, the realization method and performance system for the distributed timed task provided by the invention have the advantages that distributed cluster deployment is supported, so a single-point fault can be effectively avoided; moreover, the tasks can be effectively prevented from being performed repeatedly, the realization complexity is low, and the research and development cost can be effectively reduced; the dependence of software products on external software products can be effectively reduced, so the risk and uncontrollability are reduced; and moreover, the realization method and the performance system can be integrated with the software product rapidly, and the realization method and the performance system have high popularization and application value.

The invention provides a method and a device for controlling a wireless controller and aims to solve the problem that a wireless sensor network is built for specific application services and cannot be deployed in a large scope in the prior art. The method comprises the following steps of: acquiring sensing service data forwarded by a common access network from at least one wireless sensor; and performing related control over the sensing service data. When the scheme of the invention is adopted, a digital subscriber line access multiplexer (DSLAM) is provided with the functions of a sink node for serving sensor nodes with a wireless fidelity (WiFi) transmission function, so that a large-range sensor network is formed by connecting sensor nodes or local sensor networks at different positions through a telecommunication network; moreover, the sensor nodes or local sensor networks at different positions can supply acquired information to a great amount of different applications, so that a multi-service and multi-sensor service mode is realized.

The invention provides a cross-chain digital currency exchange method and device, a computer system and a storage system. The method comprises the steps of sending a transaction invitation from a transaction sender on a second block chain to a transaction receiver on a first block chain; judging whether an exchange instruction is received or not; transferring the exchanged number of first currencies from the account of the transaction receiver on the first block chain to the account address of the transaction sender on the first block chain to generate a transaction; incorporating the transaction into a first block on a first block chain; generating an authentication value sequence corresponding to the transaction; sending the first block head of the block, the authentication value sequence and the account address of the transaction receiver on the second block chain to the second block chain; and executing the smart contract on the second block chain to verify the transaction, and ifthe verification is passed, transferring the second currency from the account of the transaction sender on the second block chain to the account address of the transaction receiver on the second blockchain. According to the invention, the monopoly operation of a centralized transaction station is eliminated.

The invention discloses a Storm based stream computing frame text index method and system. The Storm based stream computing frame text index method includes: implementing topology of a storm, designing a Storm real-time data processing frame, and completing a webpage automatic extraction program of a web spider; automatically extracting key words; and classifying texts: classifying texts into one or more classifications according to content or attributes of the texts. The method and the system can allow backup data back in the conditions of data corruption or data loss, and recovers data; the function of centralized operation and maintenance of the system can be provided; an interface is beautiful and practical, and a convenient and visual graphical user management interface is achieved; function expansion can meet the demands of a user for later system expansion and use range expansion; and fault tolerance allows the system to have a certain fault tolerance mechanism when illegal data generates due to user input or wrong operations.