74results about How to "Fast failover" patented technology

A system, method and computer program product that is designed to support high-availability, rapid fault recovery, out of band condition signaling and/or other quality of service assurances and security in a networked environment. In one aspect, a method of the invention includes the step of providing a processing system with a dual-kernel or multi-kernel software operating system. The operating system includes a supervisory operating system and a secondary operating system that provides network functions to user applications. The method also includes the step of providing a Network Control Software (NCS) in the supervisory operating system. The NCS is configured to transparently monitor and control network operations in the secondary operating system.

The invention relates to an enterprise application deployment and management system for multiple tenants. A container-based multi-tenant isolation mechanism is realized; the integration and migration of enterprise legacy systems are supported; rich enterprise-level services are provided; SOA architecture-based enterprise-level application development is supported; perfect self-service ability is provided; high availability of a platform can be provided; dynamic expansion and demand-based scalability can be realized; and pure asynchronous intelligent routing is realized. The objective of the invention is to solve problems in multi-tenant resource isolation, compatibility with existing applications and composite application construction in cloud computing technologies for enterprise applications. The enterprise application deployment and management system for multiple tenants has the advantages of multi-tenant safe isolation, seamless migration of enterprise applications and the scalability of applications.

The present invention is directed to a heartbeat apparatus via a remote mirroring link for a multi-site and a method for using the heartbeat apparatus. Information is registered in a configuration table, wherein the configuration table stores host ID information and volume ID information. The configuration table is configured, access requests from a host are verified, host activity is recorded, and additional records are created in the configuration table when a match is found between the access records and the registered information. In a multi-site having two, three or more sites in a multi-hoop configuration, a failover process with remote mirroring pairs is performed by configuring a correlation between a remote mirroring pair group, an activity monitor function and an alert function, wherein the alert function is performed by a host sending status information regarding activity monitoring in a storage system and retrieving the notification information via a plurality of data links, and creating a status manage table using the notification information.

The invention discloses a method, relative device and system for achieving restoration of a terminal called service. The method comprises the steps that when a called request to a user terminal is received, and an initial proxy call session control function entity (P-CSCF) currently registered by the user terminal is inquired; if the fact that the initial P-CSCF goes wrong is detected, an available P-CSCF is selected, notification messages carrying disaster tolerance identification are sent to the available P-CSCF, and the disaster tolerance identification is used for indicating the available P-CSCF to trigger the user terminal to re-register the P-CSCF; when the register completing information sent by the re-registered P-CSCF of the user terminal is received, the called request is sent down to the re-registered P-CSCF to bear the called service of the user terminal. Through the adoption of the method, relative device and system for achieving the restoration of the terminal called service, failure recovery can be completed rapidly in existing network architecture.

The teachings presented herein enable a user terminal to perform a fast recovery from a radio link failure. In one aspect, the improvement in recovery time is achieved by commanding or otherwise causing the user terminal to perform radio link failure (RLF) recovery at a cell that is known to possess the user context, while considering that this cell should yield good radio conditions (if not the best) to the user terminal. A cell may be predefined for use by the user terminal in recovering its radio connection. Based on providing signal strength thresholds to the user terminal, for use in determining whether to use a predefined cell for reconnecting to the network, the user terminal attempts RLF recovery first in the predefined cell. By providing user context to the predefined cell in advance of a recovery attempt by the user terminal, the time for recovery is lessened. Note that the user terminal also may infer which cells are preferred.

A high availability cluster computer system can realize exclusive control of a resource shared between computers and effect failover by resetting a currently-active system computer in case a malfunction occurs in the currently-active system computer. In case a malfunction occurs in a certain system in a cluster, another system in the cluster which has detected the malfunction issues a reset based on a priority to realize failover in which a standby system takes over the processing of the malfunctioning system when the malfunctioning system is stopped.

The invention relates to a method and system for carrying out automatic master and slave failure recovery on the basis of virtualization. Deployment includes a control center and a cluster system of a plurality of physical machines, and a plurality of virtual machines operate on each physical machine; the operating states of all the physical machines are monitored by the control center in real time, and the operating states of the virtual machines in each physical machine are monitored by the physical machine in real time; when failure occurs, whether a virtual machine or a physical machine fails is judged, and specific automatic failure recovery is then carried out. The invention introduces the virtualization technology into the failure recovery of master and slave systems, failure sensing and failure recovery can be automatically carried out without human intervention, and compared with the conventional manual recovery method, the invention can realize rapid failure recovery and control recovery time at the minute level, thus shortening the time of instability of service offered by only one machine; and moreover, the invention can realize the rapid failure recovery of both the virtual machines and the physical machines, thus expanding the coverage of reliability assurance.

The invention discloses a fault recovery method applied to an intelligent distribution network and based on load balance, which includes the following steps: 1, one intelligent distribution terminal is respectively installed at the position of each switch of the intelligent distribution network, each intelligent distribution terminal is regarded as an Agent, and all the Agents are connected with each other through the optical Ethernet network, 2, each Agent automatically determines a fault zone, a non-fault zone and a fault recovery zone through information interaction; 3, the fault of the agent at the position of each interconnection switch is recovered; 4, all the Agents perform information interaction to judge whether a load shedding zone exists, if the load shedding zone exists, the step 5 is carried out; otherwise, a fault recovery task is completed; 5, the Agent in the load shedding zone searches whether a DG capable of achieving plan islet operation exists in the load shedding zone, if exists, power supply recovery commands are sent to the Agent at the position of a DG outlet; otherwise, a load at the zone is removed from the distribution network; and 6, the Agent at the position of the DG capable of achieving the plan islet operation recovers power supply for a load at the zone according to the fault recovery method in the step 3, and the load which fails to be recovered is removed from the distribution network.

The invention discloses a neural network assisted integrated navigation method for an underwater vehicle. The neural network assisted integrated navigation method is implemented by use of strapdown inertial navigation system (SINS), a Doppler velocity log (DVL), a magnetic compass pilot (MCP) and a terrain aided navigation system (TAN), wherein the integrated navigation is completed by use of a decentralized filter structure of Kalman filtering and a fault-tolerant method, assisted by a radial basis function neutral network (RBFNN). In a fault-free time period, RBFNN is in an online learning model, the observed quantity difference between the SINS and each auxiliary system is taken as the expected output of the RBFNN, and the output fb of an accelerometer after error compensation and the output shown in the specification of a gyroscope are taken as the inputs of the RBFNN; when a sub-system composed of the SINS serving as a reference system and each auxiliary system is out of order, an RBFNN prediction mode is immediately activated, and the predicted output is taken as the measurement input of a corresponding sub-filter. Compared with the SINS mode out of order, the RBFNN mode has the advantages that the navigation accuracy is improved; especially when the fault recovery time is relatively long, the improvement of the navigation accuracy of the RBFNN mode is particularly obvious.

Embodiments of the present invention provide a method for managing parallel user mode protocol stacks and a protocol stack system, and the method comprises: monitoring the running state of the instance corresponding to each protocol stack of the user mode protocol stacks, one instance corresponding to one protocol stack of the user mode protocol stacks; determining a first instance and a second instance, wherein the first instance is the instance in an abnormal running state, and the second instance has the capability of moving into at least one load to be migrated in the first instance; and re-establishing the at least one load to be migrated in the second instance according to a PCB in a shared resource pool, wherein the PCB corresponds to the at least one load to be migrated in the first instance. In the embodiments of the present invention, as the load to be migrated is reestablished in the instance with the capacity of moving into the load according to the PCB in the shared resource pool, wherein the PCB corresponds to the load to be migrated in the abnormal instance, the system distributing bottleneck caused by the protocol stacks sharing one distributing module is overcome, and the load balance and failure recovery are quickly performed, and therefore the performance of the protocol stack system is improved.

The invention provides an electric network dispatching automation system based on the virtualization technology. The system comprises a physical resource layer, a virtualization resource management layer, a system application layer and a user layer. The physical resource layer provides a physical carrier for the virtualization resource management layer, the virtualization resource management layer provides resources for the system application layer by carrying out resource virtualization on the physical resource layer, and the system application layer provides system applications for the user layer. The electric network dispatching automation system based on the virtualization technology provides needed resources such as computing, storage and networks for advanced applications, and the system has the advantages of being high in availability, high in resource using rate, balanced in load, easy to stretch and the like.

The invention discloses a quick protection method applicable to an intelligent distribution network. The method is that a current break variable starting element is utilized to start protection; adjacent protection devices exchange information; the protection is started from the downstream of a distribution circuit in which fault current is detected, and a circuit breaker at each protecting part is sequentially tripped off until reaching the upstream of the circuit, so that whether the fault current occurs in can be determined through adjacent protection devices before tripping off the circuit breaker to achieve fault positioning and fault isolation; meanwhile, an interconnection switch of each circuit is utilized to quickly recover from fault. With the adoption of the method, the quick fault positioning, fault isolation and recovery from fault of the distribution circuit can be achieved; the fault time is reduced; the power restoration of a non-fault power-off area is sped up; therefore, the power supply reliability is improved; the conflict between a distributed power supply and quick protection of the distribution network can be solved; in addition, the advantage of the network structure with high power supply capacity of the intelligent distribution network can be brought into full play, and the intelligent distribution network can be adapted well.

The invention provides a fault handling method and a fault handling device for Ethernet. The method mainly comprises that: a management node receives fault information reported by communication nodes at two ends of an Ethernet link; the management node acquires the fault information of the Ethernet link and the communication nodes at two ends according to the fault information and the heartbeat detection information between the communication nodes at the two ends of the Ethernet link. In the embodiment of the invention, the special management node is set and a special management communication channel is used to monitor the states of the communication nodes, so the communication link fault information and the communication node fault information in the Ethernet can be acquired and differentiated effectively; and thus, quick fault clearing can be performed conveniently.

The invention relates to a practical training assessment device and method, in particular, an assessment device and method for the comprehensive practical training of the turnout control of a switch machine. The device comprises an upper computer and a lower computer; the upper computer and the lower computer are connected with each other; the lower computer and the switch machine are connected with each other; the lower computer includes an STM32 microprocessor, a plurality of switch machine fault point setting relay circuits and a switch machine welding, measurement and conduction circuit; the upper computer includes a switch machine fault finding and processing module, a switch machine wiring, welding, conduction and measurement module and a comprehensive theoretical knowledge assessment module. The method includes the following steps of: switch machine fault finding and processing; switch machine wiring, welding, conduction and measurement; and comprehensive theoretical knowledge assessment. With the device and method of the invention adopted, fault points can be automatically set quickly; fault recovery can be quickly completed; labor can be saved; the welding and wiring skills of examinees can be trained; and a theoretical comprehensive knowledge test and learning function is provided. The device and method have the advantages of low cost, reliable performance and easiness in popularization.

The invention discloses a power supply line detection method including an electronic controller, a fiber transceiver, a temperature sensor, a distribution network computer terminal, and a faulty section communication device. The result of whether the relay protection is required is determined by the result of the real-time frequency analysis of the voltage parameters and the AC signal, so that the accuracy of relay protection is improved. The faulty section position is accurately determined by the wireless transmission of the acquired fault signals, and the protection ranges and protection manners of the relay protection devices away from the faulty section at different section distances are determined, so that the overstep and over-protection-range misoperations of the relay protection devices can be prevented. According to the invention, the fault points can be found as soon as possible, the fault reasons can be conveniently found out and the faults can be eliminated, and the detection precision is high under the condition of guaranteeing the grid safe and reliable running.

The invention discloses an automatic operation and maintenance method and device and a big data platform, and relates to the field of computers. The automatic operation and maintenance method comprises the following steps: establishing SSH password-free login of a master node and each slave node; and executing batch operation and maintenance operation at the master node, the SSH password-free login including authentication based on a public key. According to the automatic operation and maintenance method, all nodes in the cluster can be automatically deployed through one key, the problem thatmultiple machines in the cluster of a big data platform are inconvenient to operate is solved, convenience is provided for real-time operation and maintenance, and the working efficiency is improved.

The invention provides a cloud computing network flow robust forwarding method based on a gateway cluster. The method comprises a gateway cluster initialization stage, a flow forwarding and table item issuing stage and a multi-IP migration scheduling stage. According to the method, in order to improve the robustness of cloud network flow forwarding, for burst flow, a gateway cluster is introduced to jointly bear the flow, and a mapping algorithm of a virtual private cloud and the gateway cluster is designed to achieve load balancing of the cluster. For an abnormal event, the method provides a multi-IP migration scheme to realize rapid fault recovery. The gateway provided by the invention is realized by adopting a fast data path, so that the forwarding performance of the gateway can be effectively improved, and the transmission delay is reduced. The method disclosed by the invention can also be used for deploying network middleware/network functions so as to improve the robustness of the cloud computing network, and has a very wide application prospect.