60results about "Database distribution/replication" patented technology

The invention relates to an anonymous electronic voting method based on blockchain. A blind signature electronic voting scheme is introduced into blockchain as a vote information database, each vote is written into a transaction data block and transmitted to a counting center, in addition, a monitoring mechanism is introduced into the method, then rights of operators can be limited, and the situation that fraud voting is resulted or the voting process is interfered and voting results are affected since rights of operators are too centralized, is avoided. By adopting the method, the anonymity of a conventional electronic voting system is effectively solved, and the method has the characteristics that votes cannot be forged, the voting process and the voting results are open and transparentand can be verified, and the like.

A disaster recovery switching method, a node and a system are provided. The method is applied to a disaster recovery switching system. The disaster recovery switching system includes a production node, a disaster recovery node and a recording node. The production node currently runs a first production service. The method includes the steps that the recording node receives first recovery information sent by the production node, wherein the first recovery information refers to the information required for recovering the first production service to a latest running state of the first production service; and the recording node sends second recovery information to the disaster recovery node when it is determined that the first production service is recovered on the disaster recovery node, wherein the second recovery information refers to the information required for recovering the first production service on the disaster recovery node obtained according to the first recovery information tomake the disaster recovery node switch the first production service to the disaster recovery node according to the second recovery information. The disaster recovery switching method, the node and thesystem can achieve the seamlessly switching of business, ensure the normal operation of the business, improve the stability of the production service and effectively avoid data loss in the event of asudden disaster on the production node.

The invention discloses a method and a device for synchronizing database increments to a dynamic ES index database, and a medium, belongs to the technical field of real-time retrieval of data variables in a database, and aims to solve the technical problems of complex operation, high delay and inflexible configuration of an existing service system during real-time data updating. The method comprises the following steps: performing dynamic data modeling on an MYSQL data table by taking an object and an attribute as core elements; starting and reading a BINLOG log of the MYSQL, and analyzing andpackaging a read MYSQL operation event into an event object; sending the event object message to a message queue, and writing the event object message into an ES index library through a message queueconsumer; and calling the service of the ES index library to create an index through the message queue consumer, reading the data model configuration index from the MYSQL data table, and updating theincrement and the total amount of the data to the ES index library.

The invention provides a method, a system and a device for pre-generating coupons, and a server. The method comprises multiple steps of randomly generating multiple coupons; storing the generated coupons in at least on storage system in a distributed manner; and allowing a client to acquire the coupons form the at least one storage system. According to the invention, in a way of pre-generating coupons, a situation of repeated coupons is effectively avoided; and the generated coupons are stored in a distributed manner, so efficiency for acquiring the coupons of the clients is effectively improved.

A system and method for generating backups of a protected storage system from protected data in a recovery system including protecting data in the recovery system, the recovery system including a target disk configured to store a replica of the protected storage system from a predetermined time point and a journal including data and metadata of write operations to the protected storage system that occurred after the time point, periodically generating replicas of the protected storage system from the recovery system, and storing the replicas as backups.

The invention belongs to the technical field of cloud storage, and particularly relates to a cloud storage data grading method based on user behaviors. The method provided by the invention mainly comprises the following steps of: the cloud platform counts the operation behaviors of the user on the data, wherein the operation behaviors at least comprise uploading, downloading, transferring, collecting and deleting, the statistics at least comprises statistics of the occurrence time and frequency of the operation behaviors, the value of a data file at a certain moment is calculated according tothe statistical data, and in a target time period, the data value is given according to the operation frequency; the current time value of the data is estimated of estimating by adopting an evaluationmethod according to the values of the data on different sequences within a period of time, sequencing the values of all the stored data according to the current time value of the data, and defining the first 10% of the sequencing set as hot data and the first 20%-20% of the sequencing set as hot data; Wherein 10% is defined as general data, the rest is defined as cold data, and the data is movedto a corresponding storage position according to the definition of the data.

The embodiment of the invention discloses a data distribution method and device, equipment and a storage medium, and the method comprises: determining the number of slots and at least two hash valuesof a hash distribution table; allocating nodes to each hash value, and storing the number of slots and the distribution mapping relationship between each hash value in the hash distribution table andthe nodes, so as to distribute the data of each hash value in the corresponding node, the distribution mapping relationship being non-fixed; and after the newly added nodes are added, performing dataredistribution based on a preset redistribution mode and updating the corresponding distribution mapping relationship. By the adoption of the technical scheme, logic and physical separation of data distribution is achieved by storing the distribution mapping relation between the non-fixed hash values and the nodes in the MPP system, when new nodes are added into the MPP system, data redistributioncan be achieved more efficiently, and then rapid system expansion is achieved.

The invention relates to a log generation and storage method and device for a smart contract, equipment and a storage medium. The method comprises the steps of forming a log document of the smart contract; generating a first private key and a first public key matched with the first private key; writing the first public key into a log document of the smart contract; generating a pair of second public key and second private key; generating a first shared key according to a first encryption algorithm, the first private key and the second public key; encrypting original log content according to the first shared key and a second encryption algorithm to obtain encrypted log content; writing the encrypted log content into a log document of the smart contract; and storing the intelligent contractlog document. According to the method, the timeliness and accuracy of intelligent contract log generation are improved, the generated first shared secret key used for encrypting the original log content is different, the cracking difficulty of illegal users is greatly increased, and thus the security is improved.

The invention discloses a data center, which mainly solves the safety problem in the development of small and medium-sized enterprises, and separates the management of codes and databases by developers. The data center has the capability of accessing multiple databases without modifying the code, and can record and analyze the execution efficiency of sql for each database read and write. The datacenter includes several main warehouse servers, several user warehouse servers, merchant merchandise warehouse servers, order warehouse servers, log warehouse servers, year card related warehouse servers, center data interface center and mysql relational database. The user database server, the merchant commodity database server, the order database server, the log database server and the year cardrelated database server are arranged in parallel and connected with the mysql relational database and the center data interface center respectively, and are connected with the main database server through the mysql relational database management system.

The invention provides a work order synchronization method and system based on a discrete scene, equipment and a storage medium, and the method comprises the steps: detecting a production plan state, obtaining a second plan number and a material stock number, updating a production plan according to the second plan number and the material stock number, and obtaining a second production plan; dispatching work according to the second production plan, generating a production work order, updating the form content of the process work report according to the production work order, and obtaining a second process work report; on the basis of the second production plan and the second process report, updating form contents of reworking and repairing, production materials, production feeding and material picking and returning details; and according to all the updated form contents, judging the states of the production plan, the production order and the process work report, and performing updating. The planned production scheduling data can be quickly restored in the production scheduling link, the working efficiency is improved, corresponding customer requirements can be scheduled in real time according to customer requirements and actual field material conditions, and the material utilization rate is improved.

The invention discloses a data storage and query method based on a distributed database, and the method comprises the following steps: S1, setting a connected data source through a client, and determining the data type of to-be-processed data; S2, determining that the data is core business data, and storing the core business data in an ORACLE database; s3, confirming that the data is log data, andasynchronously storing the log data into a MySQL database at the rear end of the database middleware through a message queue; s4, storing the database middleware the data to fragmentation nodes of aMySQL database main library; and S5, enabling the MySQL database main library to regularly extract the data of each fragment node and synchronizes the data to a historical database. The message queueasynchronously lands the log service data into the log data center library, so that the data volume of the core transaction library is reduced, the performance of the core service library is guaranteed, and the overall operation efficiency of core services is improved. Meanwhile, the query and storage problems of log historical data are efficiently solved.

The invention discloses a cache system and method supporting real-time change notification and real-time data synchronization, and belongs to the field of enhanced memory cache. The system comprises adata synchronizer, a memory cache, a cache change monitor and a subscription registrar. The method comprises the steps of: starting a data synchronizer, and when a memory cache is started, caching all data in a far-end database to a local memory; enabling the data synchronizer to update the cache content of the memory according to the change event when the data is changed; adding the monitoring layer which is used for monitoring modification operation on the memory cache, generating and pushing an event to the subscription registrar when an adding, deleting, modifying and checking interface provided for the outside is called, and enabling the registrar to distribute the modification and/or updating of the memory cache to a corresponding subscriber; and starting and using the subscriptionregistrar for receiving a subscription request from a caller, establishing a persistent channel between the subscription registrar and the caller, and pushing an event to the subscription channel whencorresponding data modification and/or updating of the memory cache exist/exists.

The invention provides a method and a device for carrying out the data synchronization among terminals, and the method mainly comprises the following steps: a user sends data to a server through a terminal which is corresponding to a certain access mode; the server sends a notification message to the terminals which are corresponding to other access modes of the user, and the terminals which are corresponding to other access modes obtain the data through the server. The device mainly comprises: a data receiving module, a notification message sending module and a data sending module. The use of the invention can realize that when the user sends the data to the server through the terminal which is corresponding to the certain access mode, the terminals which are corresponding to the other access modes of the user can timely effectively know the data state of the server and carry out the corresponding data synchronization operation.

The invention discloses a search method and device of a distributed log. The method comprises the steps that a mode of an index filter selected by a user is determined; a screening condition which is based on the mode and inputted by the user is received; the index filter of the mode is operated, the index filter searches logs collected from a distributed network according to the screening condition, and the eligible log is obtained. The search device can conduct searching based on a saved original log file and prevents log information from being discarded in the saving process, and the searched log can be directly read by a technical staff, which helps the technical staff to rapidly make judgments according to the searched result.

The invention provides a data dynamic migration method and system for a distributed graph database. The method comprises the following steps of collecting the access information of the data by a monitor on each device, and sending the access information to a common coordinator, enabling the coordinator to generate a migration plan according to the access information and a migration strategy and send the migration plan to a migration person on each device, and enabling the migration person to complete the migration of data from a starting end to a target end in the device according to the plan.According to the method, the fine-grained migration is supported, namely the metadata overhead is avoided while the remarkable performance improvement can be obtained, and meanwhile, the data migration is very flexible and does not interfere other operations.

The invention discloses a method and a device for extracting key information of an electronic document. The method comprises the following steps of: obtaining an electronic document of key informationto be extracted; when the extraction model corresponding to the electronic document does not exist, entering a model building process, obtaining a key feature labeled by a user, extracting at least one attribute of a table in the electronic document, constructing an extraction model based on the key feature and the at least one attribute of the table, obtaining a newly-built key field name of theuser and at least one extraction strategy corresponding to the key field name, and configuring the newly-built key field name and the at least one extraction strategy into the extraction model; and obtaining a first instruction of a user, and storing the model based on the first instruction. Through the method provided by the invention, the content of the specified key field in the electronic document can be accurately and quickly extracted by designing and configuring the extraction parameters without redeveloping an extraction program, so that the structured storage of the unstructured electronic document is realized, and the processing capacity of equipment is saved to the greatest extent.

The invention discloses a permitted block chain anonymous transaction endorsement system and method, and mainly solves the endorsement strategy and identity privacy problems of an existing alliance permission block chain in transaction endorsement. The technical scheme provided by the invention comprises an endorsement node identity hiding scheme realized by using group signature, a permission block chain transaction scheme using anonymous endorsement, and a traceability and endorsement supervision scheme under an anonymous endorsement condition. According to the method, the identity privacy of the blockchain nodes participating in endorsement can be protected, the endorsement strategy of the transaction is protected, and the fault tolerance of permitted blockchain transaction endorsement is improved.

The invention relates to a distributed caching method for an IOT scene, and solves the problems in the prior art. The method is characterized by comprising the following steps: 1, exposing a Dubbo service interface to the outside, and processing hotspot data of a communication service of a vehicle-mounted machine in a general query and data change manner; 2, changing hot data and cache data, achieving two query forms of data in-disk storage and range search in query of the cache data in an asynchronous mode through an execution engine, and adapting to the engine most suitable for query conditions to query data through analysis of query statements and responsibility links; 3, in a distributed environment, if the cache data in-disk storage fails, for the condition of network waiting timeout, enabling an execution engine to realize a retry queue by maintaining Topic of kafka, and when a retry frequency configuration value is not successfully exceeded, regarding data updating as failure, and abandoning the updating command.

The invention provides a heterogeneous execution body trusted configuration synchronization method and system, and the method comprises the following steps: monitoring all online heterogeneous execution bodies in real time in the operation process of a mimicry service module, if a service judgment module judges that service data does not pass judgment, performing offline cleaning operation on the heterogeneous execution body outputting the abnormal service data, and putting a new heterogeneous execution body online; and before the newly online heterogeneous execution body is put into operation, actively downloading the trusted configuration parameters corresponding to the mimicry service from the trusted configuration information database, performing configuration recovery on the newly online heterogeneous execution body based on the trusted configuration parameters, and enabling the trusted configuration parameters to take effect locally. According to the method, configuration recovery is performed on the newly online heterogeneous execution body based on the credible configuration parameters, so that the configuration takes effect quickly and accurately, and the situation that the execution body cleaning recovery process is triggered again due to configuration failure and a vicious circle is entered is avoided.

The invention discloses a BIM-based building operation and maintenance monitoring alarm system and method, and relates to the technical field of building monitoring. The system comprises a server anda plurality of clients, wherein each client comprises a data acquisition unit, a front-end data processing unit, a front-end data storage unit, a front-end communication unit and a front-end alarm unit; the server comprises a back-end communication unit, a back-end data processing unit, a back-end data storage unit, a back-end alarm unit and a client management unit; the data acquisition unit acquires monitoring data and sends the monitoring data to the front-end data processing unit; the front-end data processing unit outputs primary alarm information through the front-end alarm unit according to a set algorithm; the back-end data storage unit stores the data collected by the front end through a time sequence database, the back-end data processing unit analyzes and processes the stored time sequence data, and the back-end alarm unit outputs alarm information, so that the requirement of each client for data processing resource configuration can be reduced, and an enterprise user can operate the BIM system conveniently.

One or more embodiments of the invention provide a block chain-based asset management method and apparatus, and an electronic device, which are applied to a node device in a block chain. The transaction type supported by the block chain comprises a first asset definition transaction used for defining an asset model; an operator of the block chain defines an asset type and an asset format corresponding to the asset type in the block chain; the method comprises the following steps: receiving a first asset definition transaction issued by an asset management party, wherein the first asset definition transaction comprises an asset model which is defined by the asset management party and corresponds to the target asset type; the asset model comprises asset creation information corresponding to the target asset type; and in response to the first asset definition transaction, storing an asset model on the block chain, so that an asset creator creates standardized block chain assets in the block chain based on asset creation information in the asset model and an asset format corresponding to the target asset type.

The embodiment of the invention discloses a blockchain consensus processing method and device, and the method comprises the steps: recording consensus messages obtained by a consensus node into a consensus log, so as to enable the consensus log to store the consensus messages according to a local time sequence; in the consensus process carried out by the consensus node according to the obtained consensus messages, if it is detected that the consensus node breaks down, the consensus log is called after the fault is recovered so as to obtain the consensus messages stored by the consensus log inthe consensus process according to the local time sequence; and re-executing the consensus process in the consensus node according to a local time sequence corresponding to the consensus message according to the consensus message obtained from the consensus log. According to the method of the embodiment of the invention, after the fault of the consensus node is recovered, the consensus state of the consensus node before the fault can be rapidly recovered.

The invention relates to a data synchronization method and device, equipment and a storage medium. The method comprises the steps of obtaining all operation information and data snapshots of a database; processing all the operation information to obtain target operation information; combining the target operation information and the data snapshot to obtain target data; and writing the target data into the target data warehouse. According to the method, all the operation information and the data snapshot of the database are obtained, all the operation information is processed to obtain the target operation information, the target operation information and the data snapshot are combined to obtain the target data, and the target data is written into the target data warehouse. The problems that the whole data link for reading the data, caching the data to the local and loading the data warehouse in batches is relatively long, and time delay exists when the data enters the data warehouse are solved, and the speed of synchronizing the data from one database to the data warehouse is increased.