54results about How to "Guaranteed Continuous Availability" patented technology

A method, system and program product for backing up a replica in a cluster system having at least one client, at least one node, a primary replica, a secondary replica, and a secondary-backup (S-backup) replica each replicating a process running on the cluster system. A hierarchy is assigned to each of the primary, secondary and S-backup replicas. The failure of one of the replicas is detected and the failing replica is replaced with one of lower hierarchy. The replica having the lowest affected hierarchy is regenerated to reestablish the primary replica, secondary replica, and S-backup replica.

The invention is suitable to be used in a field of traffic information coding, and provides a method and a system for updating road codes and a map data server. The method comprises the following steps of: according to a new-edition map, generating node data of a new road network; matching the generated nodes of the new road network with the nodes of the old road network; and coding the non-matched nodes of the new road network. In the method, the nodes of the new and the old road networks are matched, the nodes which are successfully matched of the new road network use the codes of the nodes of the old road network, the nodes failed to be matched of the new road network are coded according to the type to which the nodes belong, so that the method for updating the road codes is realized. Moreover, the uniqueness and the continuous usability of the road codes in the digital map in different editions are ensured; and in particular, under a condition that the map editions of the ATMS and the terminal are not synchronously updated, the method can ensure that the terminal uses the majority of the information data which are sent by the ATMS and related to the traffic network without updating the map edition.

The invention discloses a distributed cache architecture with a task distribution function, which comprises a distributed task scheduling system, a relational database Mysql and a redis distributed cache system. The dynamic distributed cache architecture solves the situation that the traditional database can not process and access a large amount of data. The invention discloses another cache method adopting the distributed cache architecture, can achieve automatic task distribution and fault tolerance for scenes in which computation is required, and guarantees the reliability during processing.

A method for producing hard copies of electronic information employing a portable personal receiving device includes the steps of selecting information to print and utilizing the receiving device to identify available printers based on the location of the receiving device for printing the selected information in hard copy form. The portable receiving device is connected to one of the available printers and the selected information is printed in hard copy form. A system for producing hard copies of electronic information employing a portable personal receiving device includes a portable receiving device having a program enabling selection of information to print. The portable device includes a program to identify available printers based on the location of the receiving device. A communications link connects the portable receiving device to an available printer. The receiving device may be a cell phone and global positioning satellite functionality and/or cell phone tower positions may be employed to determine the location of the receiving device.

The invention discloses a method and device for joining an alliance chain and quitting the alliance chain. The method for joining the alliance chain comprises the steps that a first node receives a joining request broadcasted by a target node; the validity of the joining request is verified based on the valid certificate list; when the validity verification is passed, the first node performs a consensus process in the alliance chain based on the joining request which is not subjected to threshold encryption; and when the joining request passes the consensus, the first node sends a first message to the target node. The alliance chain quitting method comprises the steps that a first node receives a quitting request broadcasted by a target node; the validity of the quitting request is verified based on the invalid certificate list; when the validity verification is passed, the first node runs a consensus process in the alliance chain based on the quitting request without threshold encryption; and when the quitting request passes the consensus, the first node sends a first message to the target node. Based on the process, the efficiency of adding the target node into the alliance chainor exiting from the alliance chain is relatively high.

The invention discloses an online update method of a distributive storage system. The method comprises the following steps: acquiring node information of an obtained node IP to be updated, and performing backup copying and storing on the acquired node information; updating the version of each node to be updated, and querying the cluster state of each updated node; in case of failure in updating, recovering the node information of the failed node on the basis of the node information which is subjected to backup copy in advance, and recording the update failure information; and finishing the current update. According to the method, the version of each node is updated, and the storage service remains in the updating process; various abnormal condition are automatically handled during updating; the distributive storing system can be smoothly updated in the application scene, so that the user experience is improved. The invention also discloses an online updating device and equipment of thedistributive storing system and a readable storage medium which have the beneficial effects.

The present application provides a business processing method and device based on idempotent number verification, the method comprising: in response to an idempotent number acquisition request initiated by the caller, generating an idempotent number with reference to a randomly determined target database and the current business type ; Return the idempotent number to the caller; in response to the business processing request initiated by the caller, the business processing request includes the idempotent number, and check the idempotent number; if the verification is not If passed, the caller is notified to re-initiate the idempotent number acquisition request; in response to the idempotent number acquisition request re-initiated by the caller, the idempotent number is generated according to the database that is mutually active and standby with the target database. The embodiment of the present application can ensure the implementability and high availability of the idempotent number check, and also ensure that the business processing can be continuously available.

The invention provides an implementation method of on-line upgrading firmware in a solid state hard disk, which is applied to the solid state hard disk, comprising the following steps: receiving a firmware upgrading command sent by a host; when it is judged that the mirror file in the solid-state upgrade command is complete, storing the mirror file; setting the state of PCIe Unit in the solid state drive to CRS state; judging whether the CRS state is successfully set according to the message reception status of PCIe Unit; if so, reading and writting the mirrored file to each CPU of the solid state drive. Therefore, this method can replace SSD firmware without power-down and power-up processing to SSD, thus ensuring the normal operation of enterprise equipment and the continued availabilityof services and services. The invention also provides a system for realizing on-line firmware upgrading in a solid-state hard disk, the solid-state hard disk and a computer-readable storage medium, all of which have the beneficial effects mentioned above.

The invention discloses an ad hoc network clustering method of a multi-directional antenna. The ad hoc network clustering method comprises the following steps of: performing acute initialization on multi-unmanned-platform networking, and binding key information for each node after the nodes of the multi-unmanned-platform networking are started; judging whether existing network information is monitored or not by each node according to the respective key information; if so, transmitting network access request information to apply for access; if not, upgrading the node to a cluster head node, andbroadcasting a network access invitation information frame; judging to access the network by the cluster head node; performing network service maintenance, namely, entering a service process after networking of each node is completed; at the end of each communication period, adaptively updating the cluster head node in the cluster and adding a backup cluster head node; and at the end of each communication period, enabling the cluster head node to interact with each node in the cluster in sequence to finish time calibration and position calibration, and maintaining the network to enter the next communication period. According to the ad hoc network clustering method, the network utilization rate of an ad hoc network is improved while the continuous availability of the link is ensured.

The embodiment of the invention relates to the field of computers, and discloses a caching method and equipment and a storage medium. The caching method comprises the following steps: determining theflow of data sent by a client within a first time length; determining the service level of the disk according to the disk utilization rate and the flow of the data, the service level comprising a first service level and a second service level, the first service level being to write the data into the cache region, and the second service level being to discard the data; and determining to cache or discard the data according to the service level. The service level of the disk is determined through the disk utilization rate and the data flow, and the data is cached or discarded according to the determined service level, so that the situation that the data cannot be processed when the data volume is suddenly increased in a short time is avoided, a guarantee is provided for the continuous availability of the server node, and the stability of the network is further improved.

The invention discloses an automatic disaster-tolerant system based on a Greenplum database. The system comprises a task initiation layer, a task synchronization layer and a result analysis layer, wherein the task initiation layer queries a production data cluster, monitors data variation in the Greenplum database and judges whether data synchronization is needed or not; the task synchronization layer defines a metadata monitoring task, records metadata changes and then synchronizes changed metadata in the production data cluster into a disaster-tolerant data cluster through a pipeline; the result analysis layer calculates changes of the disaster-tolerant data cluster according to the synchronized data, compares the synchronized data of the production data cluster with the synchronized data of the disaster-tolerant data cluster, records daily synchronization and outputs an analysis result. The system has certain redundancy, high performance and high availability, can guarantee efficient running of the database, effectively avoids business performance problems caused by faults and is simpler and more reasonable in structure and wide in application range.

A method and apparatus for trickle-down transmission of data, storage medium and a terminal, the method comprising: full and incremental streams are imported in parallel, The total data stream and theincremental data stream respectively comprise at least one record row, for each record row, the record row having a timestamp for uniquely identifying the data version, a status code for identifyingthe validity of the record row, and a row key, the row key being determined according to a primary key of the record row; For a plurality of record rows with the same row key, respective timestamps and status codes of the plurality of record rows are merged according to an operation type of a record row imported from an incremental data stream among the plurality of record rows, the operation typebeing used to indicate an import mode of the record row. The scheme provided by the invention can effectively realize the data real-time synchronization between the database and the big data platformand between the big data platform and the big data platform, and ensure the continuous availability of the big data platform during the synchronization period.

The invention provides a DDoS attack judgment and flow cleaning method and device and electronic equipment, and the method comprises the steps: judging the start time of a DDoS attack; and when the DDoS attack is judged, carrying out flow distinguishing processing and flow cleaning. According to the technical scheme, the DDoS attack traffic is detected by taking the newly added session connectionnumber threshold value per second of the server and the session connection threshold value as judgment points, and when the value exceeds a set value, the point is judged as an attack starting point,and a defense strategy is triggered. Compared with a traditional threshold detection method, the detection method has the advantages that the DDoS attack starting time can be judged more accurately, the cleaning strategy is continuous and coherent, continuous availability of the server is guaranteed by controlling the connection curve, and the server is not completely discarded and newly built atthe maximum connection position.

The invention discloses a high-security Internet teaching system adopting a big data technology. The system comprises a learning resource management platform, an aided multimedia platform and a big data analysis module, wherein a signal end of the learning resource management platform is connected with an application program server, an interactive port of the application program server is connected with a database server, a signal end of the database server is connected with a database management system, the signal end of the learning resource management platform is connected with the aided multimedia platform through a wireless network, and an output end of the learning resource management platform is connected with the big data analysis module. According to the system, in the process ofusing Internet aided teaching, a teacher can store course data into a server of the online aided teaching system, a user logs into the server through the network to call the data, and teaching relevant activities, such as teaching resource publishing, course browsing and teaching content discussion, can be realized.

The invention relates to an online sampling device for an oil pipeline. A section of process pipeline is arranged on a main pipeline, an inlet end of the process pipeline is connected with a sampling probe, an outlet end of the process pipeline is connected with a nozzle, and the sampling probe and the nozzle are all connected to the main pipeline; a sampling loop pipeline is in bypass connection with the process pipeline behind sampling pumps, representative samples are taken from the sampling loop pipeline, and residual liquids finally converge to the main pipeline. By means of the online sampling device, reliable operation, real-time continuous sampling, accurate sample quantity and precise loop flow control can be realized, and the requirements for representative samples, automatic sampling process and precise system control are met finally.

This invention relates to an adaptability service connector and a connect method under the network environment. The service connector is a regulation and control device for service and connection in distribution system composed of an interaction component, service address storage a service selection part, a connection control part, an access part and a configuration part, among which, the control part controls the selecting part to select one service from services stored in the address storage to set up service connection relations and controls the access part to dispatch the service. The access part triggers execution of the service which feeds back data to the interaction part after finishing the performance to finish the interaction and configuration part can regulate the interactive part of the connector, service address in the address memory and the selecting part.