43results about How to "Strong disaster recovery capability" patented technology

The invention discloses a data synchronization method for a metadata service cluster of a cloud storage system, and solves the problems of asynchronous data storage and poor data consistence in the conventional cloud storage system. The method comprises the following steps: (a) constructing the metadata service cluster by using more than two metadata servers; (b) creating disk equipment or modifying data on the data node of one metadata server; (c) transmitting change information to the remaining metadata servers in the metadata service cluster by using the data node on which the disk equipment is created or data are modified; (d) receiving the change information by using the remaining metadata servers and updating data in corresponding data nodes at the same time. According to the data synchronization method, data are synchronized in real time, thereby realizing high data consistence and enhancing the reliability of the system. If one of the metadata servers breaks down, running of the entire system is not influenced. Each metadata server does not influence one another, high disaster toleration, high system performance and high processing speed are realized, and flow is saved.

The invention provides a method for positioning cattle and sheep on the meadow based on a Lora technology. According to the method for positioning cattle and sheep on the meadow based on the Lora technology, the number of gateway nodes is more than three, the more the gateway nodes are, the higher the positioning accuracy is, and there is no specific requirement for the positions of the gateway nodes.

The invention belongs to the technical field of air-ground integrated Internet of Vehicles communication, and discloses an air-ground integrated Internet of Vehicles relay selection method based on state transition probability. The method comprises the steps of constructing an air-ground integrated Internet of Vehicles model composed of V vehicle nodes and U unmanned aerial vehicle nodes; constructing an information transmission mechanism between the mobile nodes based on the air-ground integrated Internet of Vehicles model; constructing a state transition probability between the mobile nodesbased on the information transmission mechanism between the mobile nodes; based on the state transition probability between the mobile nodes, constructing an information identification method based ona multiple-input-multiple-output technology; and constructing a relay selection method based on the state transition probability on the basis of the information transmission mechanism between the mobile nodes, the state transition probability and the information identification method. The method can be applied to an urban intelligent traffic system, the relation among vehicles, unmanned aerial vehicles and users is enhanced, and a real-time, accurate and efficient comprehensive transportation and information transmission system is built.

The invention discloses a method and a device for implementation of a low-cost high-availability system. The high-availability system adopts no independent storage device, storage resources of the high-availability system are provided by local hard disks intrinsically carried by computing resources, and the local hard disks of the computing resources in an active state and a standby state are backed up mutually in real time. When the computing resources (active nodes) in the active state are in fault, one of the computing resources in the standby state is selected according to a preset strategy to serve as a new active node and immediately take over applications and services provided for the outside by the high-availability system, and meanwhile, the storage resources are switched. By means of the scheme, the low-cost high-availability system can be implemented.

The invention provides a dynamic differential positioning method based on mobile edge computing (MEC). The method comprises the following steps: dynamic differential positioning calculation modules are deployed on an MEC server; the MEC server receives regional differential correction values that are broadcast by a cloud computing platform in a real-time manner, wherein the cloud computing platform is based on a satellite navigation ground-based augmentation system; the MEC server receives observation data, which is based on a satellite navigation system, from a mobile terminal; the MEC servercarries out differential calculation according to the regional differential correction values and the observation data of the mobile terminal and through the dynamic differential positioning calculation modules so as to obtain a high-precision positioning result of the mobile terminal, and sends the high-precision positioning result to the mobile terminal; and the mobile terminal receives the high-precision positioning result from the MEC server. The method provided by the invention has the characteristics of millisecond-scale delays, large system capacity, high disaster tolerance, and high simplicity of a communication protocol.

The present invention provides a wireless local area network remote supervision method, belonging to the wireless local area network remote supervision technology field. The problem is mainly solved that the interference and the performance of the current access points are decreased in the condition of the dense deployment. The method mainly comprises the features: a remote server, a wireless access point and an internet for remote connection are provided, and the remote server and the wireless access point are connected with the internet through a pass-back network; and the wireless access point exchanges a TCP transmission packet with the remote server to timely send the monitoring information of the access point to the remote server and receive a control instruction transmitted from the remote server so as to regulate the work state of the access point. The wireless local area network remote supervision method realizes the monitoring and dynamic management of the wireless access points in the dense deployment environment, reduces the retransmsstion on the internet, reduces the mutual interference between adjacent access points, is continuous and reliable in the remote network supervision, and is mainly used for the remote supervision of the wireless local area network based on the internet TCP protocol.

The invention discloses an intelligent household system many-to-many control system structure arrangement and a realization method. The structure arrangement comprises control terminals, controlled objects and a gateway. The gateway is provided with a central control function. There are multiple controlled objects which can be controlled by one or multiple control terminals. The control terminals are divided into direct-control terminals and indirect-control terminals. The direct-control terminals, such as remote controllers, control via RF communication. The indirect-control terminals, such as a tablet computer, a mobile phone, a desktop computer and a notebook computer, control via a network system formed by a wired network, a wireless network, a mobile network, a router and the gateway. The intelligent household system many-to-many control system structure arrangement is high in reliability and has extremely high disaster tolerant capability so as to be widely applied to various intelligent household systems.

The embodiment of the invention provides a link establishment method and device, and the method comprises the steps: receiving an AP address list issued by a navigation server, and enabling the AP address list to comprise a plurality of AP node addresses; Selecting an AP node address from the plurality of AP node addresses as a target address, and initiating a link establishment request with a data center to an AP node corresponding to the target address; Judging whether link confirmation information of successful establishment of the data access link fed back by the data center is received within a preset time length or not; If the link confirmation information is not received, sending the link confirmation information; and if so, re-selecting one AP node address from the plurality of APnode addresses according to a preset rule to serve as the target address, and initiating a link establishment request with a data center to the AP node corresponding to the target address until link confirmation information fed back by the data center is received. The disaster tolerance of the data access link can be effectively improved, and the stability of the data access link is ensured.

The invention discloses a data supplying system and method, and a terminal. The data supplying system comprises at least one data cache, at least one data query module and at least one data routing module, wherein the data cache is used for storing various pieces of data; the data query module is suitable for receiving the query request of a demand side and carrying out matching query on various pieces of data in the at least one data cache according to the query request to obtain a first query result and feed the first query result back to the demand side; and the data routing module is suitable for calling a corresponding supplier server when a first query result indicates that data matched with the query request is not inquired, and loads corresponding data information to the at least one data cache according to a second query result fed back from the supplier server. Through the technical scheme of the invention, the performance of the data supplying system can be improved.

The invention provides a method and device for reducing system switching unavailable time of a disaster recovery center. The method comprises the steps of obtaining system unavailable time of the disaster recovery center when a disaster occurs; determining a disaster recovery service scheduling model according to the system unavailable time; obtaining a job of a user corresponding to a service system of the disaster recovery center; determining a total risk value of the job according to the disaster recovery service scheduling model; obtaining a preset threshold value; and scheduling the job according to the threshold value and the total risk value. Through analysis of the system unavailable time of the disaster center when the disaster occurs, an RPO risk model and the disaster recovery service scheduling model are researched, on this basis, the total risk value of the job of the user corresponding to the service system is computed; the total risk value is compared with the threshold value to carry out service scheduling, so that the system data unavailable time when the disaster occurs is reduced, and the disaster recovery capability of the data center is effectively improved.

The invention relates to a method for performing a hot plug test on an EIO board card under a Linux system. The method comprises the following steps of opening an IPMI service in the Linux system; loading an IPMI equipment driving script in the Linux system; adding permission to the IPMI equipment driving script, thus allowing the IPMI equipment driving script to be editable; and performing hot plug operation on the EIO board card. According to the method provided by the invention, the EIO board card is unloaded or loaded by removing the script or installing the script in the Linux system, sothat the hot plug test on the EIO board card is implemented, the situation that a host or hardware is failed due to short circuit of a hardware circuit when hot plug is performed by only using a hardware circuit way can be avoided, and thus availability, disaster recovery capability, flexibility and expansibility of a server can be greatly improved.

The embodiment of the invention provides a routing method and device for supporting disaster recovery storage in a virtualization system. The method comprises the following steps: constructing a plurality of policy routings from a plurality of data network port groups to target storage, wherein the priority of the policy routing, which is constructed later, is higher, and one data network port group corresponds to one policy routing to the target storage; accessing the target storage by utilizing a link corresponding to the policy routing which has the highest priority in the plurality of policy routings; if detecting that the link supported by the policy routing with the highest priority has faults, deleting the policy routing with the highest priority from the plurality of policy routings and enabling the policy routing with the secondary priority to take effect, wherein in the plurality of policy routings, the priority of the policy routing with the secondary priority is second only to the policy routing which has the highest priority; when deleting the policy routing with the highest priority, accessing the target storage by utilizing a link corresponding to the policy routing with the secondary priority. By adopting the routing method and device, provided by the embodiment of the invention, the disaster recovery storage utilization capability of the virtualization system can be improved.

The invention discloses a block chain backup system and a backup method.The block chain backup system comprises a rack, a heat dissipation assembly, a case, a protective cover, a displayer, a backup host, a data transmission assembly, a protective assembly, a backup unit and a waterproof base, and the heat dissipation assembly is fixedly installed on the bottom end face of the rack; a waterproof base is arranged below the bottom of the heat dissipation assembly, a case is fixedly installed on the end face of the top of the rack, a protective cover is fixedly installed on the outer side of the case, and the bottom of the protective cover is fixedly connected with the end face of the case; according to the block chain backup system, the overall structure is good in protection performance, and the service life of the display can be effectively prolonged; furthermore, data transmission is facilitated, and the dustproof effect is good; the disaster tolerance is high, and the reliability of data backup is ensured; meanwhile, the method has relatively high data confidentiality; through the use of the threshold secret sharing scheme, reliable data backup can be realized, and the storage space can be effectively saved.

The invention relates to a method and a device for importing a large data volume of text files into a distributed database, which are characterized in that the method comprises the following steps of:inquiring and acquiring file import parameter configuration; dividing the text file with the large data volume into a plurality of file reading subareas in a data volume averaging manner; splitting all the file reading sub-regions by threads with the corresponding number, and respectively splitting data in each file reading sub-region into a plurality of sub-files with the same number; distributing all the sub-files obtained after splitting to a plurality of distributed APs; and sending a file import request to each distributed AP by using a multi-thread asynchronous outbound call, initiatinga corresponding number of threads by each distributed AP according to the number of the distributed sub-files to import the file, and importing the file into each sub-table according to the number ofthe split sub-files concurrently. In addition, the invention further relates to a device for importing the text files with the large data volume into the distributed database.

The invention discloses a disaster-tolerant response method for emergency frequency control on the demand side of a super-large-scale power grid in the field of power systems, comprising the steps of: S1: an intelligent gateway predicts the lowest point of frequency drop based on obtained system parameters and a frequency curve monitored in real time; S2: If the intelligent gateway detects that the frequency is lower than the lower bound value when the frequency is normal, the intelligent gateway estimates the range of active power deficit and the lower bound of the lowest frequency point; S3: Based on the estimated value of the active power deficit and the lower bound of the lowest frequency point, calculate the conservative response value P _C , remove the load; S4: The intelligent gateway continues to monitor the system frequency after the load is removed, and if the frequency exceeds the rated frequency of the system for 2s, it will immediately restore the erroneously removed load. The invention can avoid the frequency from contacting the low-frequency danger threshold by using the least demand-side load resources, and even in the case of a malfunction, it will not cause the frequency to greatly exceed the rated value, and the mechanism itself has a strong disaster tolerance capability.

The invention discloses an intelligent parking method based on a LoRa technology. The intelligent parking method comprises a geomagnetic terminal, a Lora core network and a GLDN intelligent cloud platform; the LoRa core network transmits parking lot parking information to the LoRa core network through a LoRa protocol the Lora core network comprises a LoRa gateway and a network server. The LoRa core network transmits the parking information to the GLDN intelligent cloud platform through a public information base station; and the GLDN intelligent cloud platform processes the information according to the service logic, and pushes a result to an IOS mobile service end and an Android mobile service end.