175 results about "Key-value database" patented technology

The invention discloses a distributed key value database system, which comprises a client end and a data server cluster, wherein the client end comprises a Hash module, a positioning module and a forwarding module; the data server cluster comprises a plurality of data intervals; each data interval comprises a host node and a plurality of slave nodes; the host node comprises a first read module, a write module, a first recovery module, a first log module, a first decision module and a first storage engine module; the Hash module is used for receiving a write request sent from a client, and positions the write request to the data intervals according to a key of the write request; each write request is provided with a number distributed by a system automatically; the positioning module is used for positioning the write request to the host nodes of the data intervals; and the forwarding module is used for sending the write request to the write module of the main node. According to the distributed key value database system, strong consistency between data copies is provided under the condition of smaller expenditure.

The embodiment of the invention discloses a method for realizing real-time retrieval. After extending a Key-Value Hash database to form a relational database structure, the method comprises the following steps of: receiving information carrying Key-Value data and delivered by a client; writing data into memory object caches and extended Key-Value Hash database according to the information; receiving query commands delivered by the client; and retrieving according to the query commands. Simultaneously, the embodiment of the invention also correspondingly discloses a system and a server for realizing the real-time retrieval. Adding the Key-Value database served as persistent storage for the memory object caches, the embodiment of the invention is capable of realizing quickly reading and writing the data in the database under the condition of high concurrent access and prevents data loss in the retrieving process. Simultaneously, the Key-Value database is extended to form the relational database structure, thus being capable of realizing the queries on complex conditions.

The invention discloses a dynamic user behavior-based cloud forensics method and a dynamic user behavior-based cloud forensics system; the formalized definition of dynamic user behavior is put forward as basis; and the method comprises the steps of: collecting dynamic user behavior and behavior data, and storing the behavior data as primary evidence data; carrying out data integration, data cleaning and data mining to form forensic analysis data, and storing the forensic analysis data into a data analysis library (key value database); using Map Reduce to carry out correlation analysis, sequence pattern analysis and isolated point analysis on the forensic analysis data, and digging out the potential user behavior patterns and the possible aggressive behavior to form forensic evidence; and displaying the forensic evidence in a visual way. The high performance computing power of cloud computing and large-scale distributed-memory environment are applied into computer forensic analysis, so that various problems in cloud computing forensics can be solved.

The invention provides a multi-device linkage control method and device and a storage medium, and the method comprises the steps: storing an obtained target request in a preset key value database, wherein the target request comprises a control instruction for at least two target devices; splitting the control instructions included in the currently executed target request in a key value database, and determining the priority of each control instruction in the currently executed target request; and sequentially sending all the control instructions in the currently executed target request to thetarget equipment corresponding to the control instructions according to the priorities from high to low so as to instruct the corresponding target equipment to execute preset corresponding operation based on the control instructions. According to the invention, the problems of long consumed time, control failure, abnormal control and the like during multi-device linkage are solved, and the effectsof realizing linkage control of the smart home device, improving the efficiency of controlling the smart home device and improving the user experience are achieved.

During a search technique, indexes associated with user accounts of users that are using the communication application are opened in memory from a transactional key-value database. These indexes encompass messages (such as emails) communicated using the communication application, and each of the users has at least one separate, associated index. When a search query associated with a target user account is received from the communication application, a search based on the search query is performed by reading the associated index in the memory from the transactional key-value database without managing the index using a file system. Then, a result for the search query is returned.

A method for bursting a hash table of a key-value database comprises receiving a key and a value, traversing trie nodes of the key-value database from a root node to a leaf node by recursively dividing the key into a prefix and a suffix, reaching the leaf node, the leaf node being the hash table, determining that the key is not stored in the hash table, determining that the hash table is not able to store the key and the value, removing the hash table, associating a new trie node with a parent trie node of the hash table, associating two or more new hash tables with the new trie node, moving all keys and associated values from the hash table into one of the two or more new hash tables, and inserting the key and the associated value into one of the two or more new hash tables.

The invention discloses a data storage method and system, and relates to the field of data storage. According to the method, data and index records are written according to the storage characteristicsof an SMR disk and a front-to-back order of storage space in Zone, and are respectively stored according to the characteristics of a Key-Value database, combination of the Key-Value database and theSMR disk is realized, the advantages of high storage density and high storage quantity of the SMR disk can be exerted, the characteristic of convenient reading of the Key-Value database can also be effectively utilized, and the data input by a user are stored in real time. In addition, Zone of which idle storage space is greater than data length is selected to store the data of each time of writing, fragmentation of the data is avoided, and reading efficiency of the data is improved.

The invention provides a data processing method and apparatus. The method comprises the steps of receiving a query operation request, wherein the query operation request comprises query parameters, and the query parameters include a first attribute identifier and a first attribute value; sending the first query request to a memory database; receiving a first query response returned by the memory database, wherein the first query response comprises a corresponding first content identifier queried in a index list corresponding to the first attribute identifier according to the query parameters by the memory database; sending a second query request to a key value database, wherein the second query request comprises a first content identifier; receiving a second query response returned by thekey value database, wherein the second query response comprises first data contents corresponding to the first content identifier and found in a key value record by taking the first content identifieras a key value through the key value database; and sending the first data contents to a requester of the query operation request. The method combines the advantages of the memory database and the keyvalue database, and has the advantages of good performance and low cost.

The invention provides a method and a device for processing data as well as a data storage system based on a key value data base. The method, the device and the system can improve the file access efficiency of the key value data base and can prolong the service life of a magnetic disc. The method comprises the steps as follows: slots corresponding to key names of data items to be stored at present are looked up in an index file according to corresponding relations between preset slots and the key names of the data items; metadata blocks of the data items to be stored at present are stored in the slots; in the corresponding relations, one slot corresponds to key names of a plurality of data items; the number of data items which correspond to one slot is preset, each slot comprises a recording area used for recording addresses of expansion slots connected to the slot; and under the condition that the slot is full, metadata blocks of data items to be stored at present are stored in expansion slots, which are not full, of the slot.

An embodiment of the invention relates to a multi-tenant expanding method based on Key-Value database. The method includes acquiring initial business entity metadata; a customizing phase, an instance generating phase and an instance operating phase, wherein the customizing phase is expanding business attributes based on the initial business entity metadata, and defining business entities and displaying labels of the business attributes to generate specific business entity metadata meeting multi-tenant requirements; the instance generating phase is establishing a Key-Value database according to the specific business entity metadata; the instance operating phase is inserting tenant identifications as RowKey prefixes to the business entity data of Key-Value database, generating a query scope of RowKey to query business entity data through the tenant identifications, extracting the business entity data from the Key-Value database in the query scope and generating an interactive interface according to the specific business entity metadata, so as to display the business entity data.

The invention discloses a high-performance computing-oriented distributed data organization method. Data access and data management are separated in an interface layer; and at a computing node end, a client provides a simplified data access interface for an application only, and file access operation, in a POSIX form, completely transparent for the application is supported. According to the method, for a data storage demand of a high-performance computing application, POSIX file system access semantics is simplified, and the data access and the data management are decoupled, so that an efficient and lightweight programming interface is provided for the application; a distributed object storage technology is adopted for performing data organization, so that data organization limitation of a conventional file system is broken through, a more efficient data access protocol is realized, and system expandable capability is further improved; and a memory-based metadata management mode is provided, and a high-performance non-relational key-value database is introduced in a high-performance computer system for the first time, so that an efficient and expandable metadata service can be provided for outside by utilizing excellent characteristics of the high-performance computer system.