165 results about "Data page" patented technology

The invention discloses a row-level data recovery method and device for a damaged file of a GoldenDB database, and the method comprises the following steps: S1, scanning a to-be-recovered GoldenDB data file, and recognizing and caching all data pages; s2, on the basis of metadata of the data pages, cluster index leaf node pages containing user data are screened out from the cached data pages; s3, for each screened leaf node page, analyzing an internal record organization structure of the leaf node page, and performing row-level data recovery; the row-level data recovery comprises the steps of traversing user records according to a virtual record pointer, and performing cross check and recovery on a traversal path in combination with a page directory slot so as to extract and mark the user records one by one; and S4, outputting all the recovered row-level data.

A method and associated memory system for randomizing memory storage data. The method and system receive at a data inverter user data and meta data sequence having an inversion seed bit, determine a value for the inversion seed bit from a look up table specifying inversion seeds for different pages of data to be stored in a memory, depending on the value of the inversion seed bit, bit-flip the user data and meta data sequence except for the inversion seed bit; and regardless of bit-flipping, exclusive OR (XOR) the user data and meta data sequence with a random sequence to produce an XORed sequence for storage in the memory as randomized data.

The invention relates to a data page recovery method and device, equipment, a medium and a product. The method comprises the steps that when it is detected that a current data page is a faulty data page, a corresponding relation associated with a data page identifier is searched for according to the data page identifier of the current data page; reading the address information and the log serial number of the historical version data page from the corresponding relation; and reading the historical version data page according to the address information, and recovering the current data page according to the historical version data page and the log serial number to obtain a target data page. By adopting the method, the recovery efficiency of the data page in a high-concurrency writing scene can be improved.

A memory device includes a memory cell array configured to store data, a page buffer circuit configured to store data in the memory cell array or read data stored in the memory cell array, and a scan register circuit configured to receive a pass / fail result of data from the page buffer circuit and store the pass / fail result in a plurality of scan registers. The scan register circuit obtains information about the scan register where the fail result is stored through a scan operation, and uses the information about the scan register where the fail result is stored to determine the number of fail bits and / or a position index indicating the position of the fail bits according to the operation mode.

Techniques can include: recording, in a log, log entries for write operations writing data pages to logical addresses; and flushing the log entries from the log, wherein flushing includes performing deduplication of the data pages. Flushing can include: partitioning the data pages into i) a first portion of the data pages that are determined to be duplicates of existing data pages, and ii) a second portion of the data pages determined to be unique data pages; atomically incrementing reference counts each corresponding to one of the existing data pages determined as identical to a data page of the first portion; and atomically binding the logical addresses to the data pages, including: binding the first portion of data pages to a corresponding third portion of the logical addresses; and binding the second portion of data pages to a corresponding fourth portion of the logical addresses.

The invention relates to a solid state disk dynamic wear balancing method and system based on data popularity, and the method comprises the steps: tracking the access characteristics of each data page in a solid state disk through a page-level counter, and enabling the access characteristics to comprise the write operation frequency, the modification period and the survival time; the data pages are dynamically divided into high-heat data, medium-heat data or cold data based on a preset threshold value, and corresponding heat layering labels are marked; collecting accumulated writing times and I / O request queue length of each channel of the solid state disk in real time, and calculating wear imbalance degree and load imbalance degree; performing data exchange according to a preset exchange mode priority based on the popularity hierarchical label, the wear imbalance degree and the load imbalance degree; and updating the logic mapping table and the channel state parameters, carrying out statistics on the balance income and the system overhead, and dynamically correcting the tolerance coefficient based on the current load type according to the income-overhead ratio.

The invention relates to a database fault recovery method and device, a storage medium and electronic equipment. The method comprises the steps that when a database normally runs, a WAL log is written into a disk, and meanwhile, a log record is pre-analyzed through a background asynchronous thread to extract core semantic information of the log record; constructing a cache structure sorted according to table space identifiers and data page numbers in the shared memory, and storing the core semantic information in the cache structure in a recovery-oriented compact format; when the check point is executed, the memory dirty page is flashed to a disk, and the cache initial position corresponding to the check point in the cache structure serves as metadata to be written into a control file; and after the database crashes and is restarted, acquiring a cache initial position from the control file, loading all core semantic information entries behind the cache initial position in the cache structure according to the cache initial position, positioning a target data page, and modifying the target data page. The technical problem that an existing database collapse recovery technology is low in recovery speed is solved.

Methods, systems, and devices for a parity scheme for read distress protection in a memory system are described. The parity scheme described herein may protect data against read distress errors. A set of consecutive word lines in a memory system may include one or more word line groups and one or more sub-block groups. The memory system may store, in a word line group of the set of consecutive word lines, parity information for the set of consecutive word lines. Each parity page may be a combination of one page of data per sub-block group and per word line group of the set of consecutive word lines. For example, each sub-block group and each word line group may contain N pages, where each of the N pages may correspond to a unique parity page to provide for recovery from errors caused by both read and program distresses.

The application discloses a data page recovery method and device, electronic equipment and a storage medium. The data page recovery method comprises the following steps: determining a data page cache of a first data page to which a target waiting event is directed, the target waiting event is a waiting event waiting for a target node in a database cluster to respond, and the target node comprises a fault node and / or an active node; releasing other data page caches in the active node except the data page cache of the first data page; and recovering a data page cache of a second data page according to a first redo log of the second data page, the second data page being a data page taking the active node as a recovery node, and the first redo log being recorded in a first log file in a disk. According to the method, other data page caches except the data page cache of the first data page are released, and then data page recovery is performed according to the first redo log of the second data page, so that the recovery efficiency of the data page in the shared storage database cluster is improved.

The application discloses a page display method and device, a storage medium, equipment and a program product, which are applied to a client, the client is in communication connection with a server, and the method comprises the following steps: sending an access request for a target page to the server, and receiving page public data of the target page returned by the server; loading the page public data, and synchronously judging whether the client has access authority of a gray version page to obtain an access authority judgment result; loading default page difference data or gray page difference data according to the access authority judgment result; and rendering and displaying a default version page or a gray version page according to the loaded page public data, the loaded gray page difference data or the loaded default page difference data. In this way, the page loading data is split into public data and difference data, the page public data loading and the gray access authority judgment are synchronously performed, and the time consumption from the request to the display of the page is effectively shortened.

A data compression method and a related device, used for reducing I / O overhead. The data compression method comprises: acquiring attribute information of a logic block, wherein the logic block comprises a plurality of data pages, and the attribute information indicates data sizes of data contained in the plurality of data pages across a plurality of time periods; if the attribute information indicates that the total data size of the data contained in the plurality of data pages during a target time period is greater than or equal to a first threshold, compressing the data contained in the logic block, and storing the result obtained by compression, wherein the target time period includes at least time period among the plurality of time periods, and the time interval between the target time period and the current moment is greater than or equal to a time threshold; and if the attribute information indicates that the total data size of the data contained in the plurality of data pages during the target time period is less than the first threshold, determining not to compress the data contained in the logic block.

The present disclosure relates in various aspects to a prelam body of a smart card, an associated smart card, an associated prelam sheet body, a method of forming a prelam body of a smart card, a method of forming a smart card for a data page of an identity document, and a method of forming an identity document. In illustrative embodiments, the prelam body comprises a base substrate formed of at least one layer, wherein the base substrate has a base substrate recess completely extending through the base substrate, a first overlay sheet layer formed over a first side of the base substrate, wherein the first overlay sheet layer has a first recess completely extending through the first overlay sheet layer and being in alignment with the base substrate recess, and an elastic plug completely filling the base substrate recess and the first recess.

Embodiments of the present application provide a database backup method and device, electronic equipment and storage medium, the method comprising: in the case of reaching a preset time node, triggering the database to refresh the data page in the shared cache area to the disk, and locking the file operation of the database switching pre-write log; after creating the basic snapshot data of the database and storing the basic snapshot data, unlocking the file operation, and listening to a plurality of pre-write logs output by the database after the file operation recovers, generating incremental log data based on the plurality of pre-write logs and storing the incremental log data; determining the starting file identifier corresponding to the earliest pre-write log in the incremental log data, and sequentially marking other pre-write logs in the incremental log data based on the starting file identifier; creating metadata information corresponding to the basic snapshot data. The present scheme realizes the non-interrupted backup of the database, guarantees the data consistency and integrity, reduces the backup data volume, and improves the backup efficiency.

A memory device includes an array of memory cells columns and rows, word lines respectively coupled to rows of the memory cells, bit lines respectively coupled to the columns of the memory cells, and a peripheral circuit coupled to the array of memory cells through the bit and word lines and including page buffer circuits respectively coupled to the bit lines. Each page buffer circuit includes one cache storage unit configured to, in programming a select row based on a current data page, sequentially store each of N bits of the current data page and each of the N bits of a next data page, N−1 data storage units each configured to, in programming the select row based on the current data page, store a respective one of the N bits of the current data page and a respective one of the N bits of the next data page in a time division manner, and a multipurpose storage unit configured to, in programming the select row based on the current data page, store at least one of the N bits of the current data page.

This invention discloses a method, system, electronic device, and storage medium for identifying counterfeit documents, comprising: acquiring an image of the data page of a target document and various business data associated with the target document; recognizing the data page image to obtain corresponding text data; fusing the text data with various business data to construct a standardized text dataset; extracting text features from the text dataset and image features from the data page image, fusing and enhancing the text features and image features to obtain joint features; performing anomaly detection based on the joint features to identify abnormal data items in the text dataset that do not conform to a preset issuance rule; mining hidden association rules between multiple data items in the text dataset, and outputting the authenticity identification result of the target document based on the abnormal data items and the hidden association rules.

The invention discloses a memory device, a flash memory controller and a control method of the flash memory controller. The method comprises the following steps of: receiving a plurality of data from a main device; encoding the plurality of data to respectively generate a plurality of code words, wherein each code word comprises corresponding data and a check code; writing the plurality of code words into a data page of a block of a flash memory module; receiving a read command from the master device, wherein the read command requires to read the plurality of codewords stored in the data page; reading the plurality of code words from the data page; sequentially decoding the plurality of code words to generate a decoding result; and if the decoding result indicates that at least one of the code words cannot be successfully decoded, decoding the code words which are not successfully decoded by using the information of the code words which are successfully decoded.

A data recovery method is provided. The data recovery method is applied to a database system, and the database system comprises a first computing node and a second computing node. The method comprises the steps that after a second computing node breaks down, a first computing node receives a service request requesting to operate a first data page; when it is determined that the first data page is stored in the second computing node or it is determined that the first data page is in a recovery state, the first computing node recovers the first data page according to a first log of the second computing node, and the first log comprises historical operation information executed by the second computing node on the first data page. According to the method, the database system can recover the data of the fault node based on the need of the service request, so that the service waiting time is reduced, and the service is prevented from being interrupted.

The invention discloses a data processing method, a data processing device and electronic equipment. The method is applied to a first device and comprises the steps that after a query request initiated by a second device is received, encryption parameters are obtained based on the query request, and the encryption parameters comprise a secret key; query operation is executed in a preset data source based on the query request, a first query result and a paging identifier of a next round of query are obtained, the first query result comprises a digital identity identifier and query feedback data, and the paging identifier is used for positioning an initial position in a next data page to be queried; anonymizing the first query result based on the encryption parameter to obtain a second query result, the second query result comprising an anonymous identity identifier and query feedback data; updating the cursor parameter of the current query based on the encryption parameter and the paging identifier; a feedback result is returned to the second device, the feedback result comprises the second query result and the updated vernier parameter, and the vernier parameter is used for being carried in a next query request initiated by the second device for the paging identifier. According to the scheme, the unified anonymous identity identification can be provided under the condition of multiple rounds of paging query, data security can be guaranteed, and data summarization and post-processing are facilitated.

A control method of a memory device includes: reading and decoding first data of a first chunk, wherein the first chunk is located in a first data page of a super data page, and the super data page includes multiple data pages respectively located in multiple data planes; in response to the first chunk failing to be decoded, obtaining data of multiple corresponding chunks of the first chunk, wherein the multiple corresponding chunks are located in other data pages of the super data page; and in response to all of the data in the multiple corresponding chunks not being successfully decoded, determining whether to give up the decoding operation of the first chunk according to a symptom weight of the first chunk and at least one symptom weight of at least one corresponding chunk.

The embodiment of the invention provides a database operation history query method and device, electronic equipment and a storage medium, and belongs to the technical field of databases. The method comprises the steps that an operation history query request is obtained, the operation history query request is used for querying an operation record of a target data row in a preset database under a target transaction, and the operation history query request comprises a page number of a data page where target data is located, a target data row identifier and a transaction submission number of the target transaction; performing transaction slot screening on a preset database according to the data page number and the target data row identifier to obtain a target transaction slot of the target data row; and according to the transaction submission number, carrying out jumping query on the target transaction slot to obtain a target operation record of the target transaction. According to the embodiment, the query efficiency of the database operation history can be improved.

One or more aspects of the present disclosure relate to paging metadata into memory. In embodiments, a metadata demand score is calculated for each extent of a storage array based on hit forecasts and read forecasts corresponding to input / output (IO) operations targeting each extent. Further, each extent can be ranked based on their respective metadata demand scores. Additionally, metadata can be paged into memory from a storage device of the storage array based on the ranking to reduce metadata page misses. For example, the memory can correspond to a global memory portion of the storage array.

This invention discloses a RAID remapping method, comprising the following steps: obtaining the position of each data block constituting the data to be remapped on the RAID disk array; determining the disk where each data block resides based on its position on the RAID disk array; reading a plurality of corresponding data blocks from each disk; and sequentially placing the plurality of data blocks read from each disk into a page table in memory according to the disk number. This invention also discloses a system, a computer device, and a readable storage medium. The proposed solution calculates the actual data page size of each disk and, when reading and writing data to each RAID disk according to stripes, performs reading and writing according to the actual data size in the stripe size of each RAID disk and in page table address order.

The present application relates to a decryption method and apparatus for a data page, a computer device, a readable storage medium, and a program product. The method comprises: upon receiving an access request for accessing an encrypted target table, acquiring a master key, and a target value and a secondary key in a tablespace file corresponding to the target table, wherein the tablespace file comprises different data pages (202); acquiring a page identifier of a target data page among the data pages (204); on the basis of the page identifier and the target value, determining a target mode from among at least two candidate modes (206); and when the secondary key is decrypted using the master key so as to obtain a plaintext secondary key, decrypting the target data page on the basis of the target mode and the plaintext secondary key so as to obtain data corresponding to the target table (208).

One or more aspects of the present disclosure relate to paging metadata into memory. In embodiments, a metadata demand score is calculated for each extent of a storage array based on hit forecasts and read forecasts corresponding to input / output (IO) operations targeting each extent. Further, each extent can be ranked based on their respective metadata demand scores. Additionally, metadata can be paged into memory from a storage device of the storage array based on the ranking to reduce metadata page misses. For example, the memory can correspond to a global memory portion of the storage array.

This invention relates to the field of memory technology, and in particular to a flash memory data page storage structure, a data operation method based on the flash memory data page storage structure, and a solid-state drive (SSD). The flash memory data page storage structure includes at least two storage cells; wherein the at least two storage cells are connected in series; each storage cell stores n bits of first data, where n is a positive integer; when n > 1, the n bits of the first data are connected in series. The flash memory data page storage structure, the data operation method based on the flash memory data page storage structure, and the SSD provided by this invention enable multiple data bits stored in a single storage cell to belong to a single data page, reducing the latency of read / write operations on the flash memory medium, avoiding mutual interference during programming and reading, thereby reducing the probability of errors and improving the lifespan of the memory.

This invention discloses a method, apparatus, and related media for editing PDF files on a web-based platform. The method includes hierarchical parsing of document data to obtain pagination resource data; object-oriented parsing of the pagination resource data to obtain a page object model; calculation of a unified display matrix from page space to device space and rendering it onto a canvas; overlaying an interactive editing layer to respond to editing operations and synchronously mapping it to the page object model; adapting display transformation parameters for annotation objects; and extracting operations of objects marked as changed and aggregating incremental operation data page by page. This invention improves the accuracy of editing PDF files on a web-based platform by using the page object model as the unified data core and integrating multi-threaded collaborative processing across hierarchical parsing, object-oriented modeling, unified display matrix transformation rendering, interactive editing synchronous mapping, annotation display transformation parameter adaptation, and incremental operation data output. This ensures consistency in data structure and coordinate system across all stages.

The application discloses a front-rear end cooperative large PDF file intelligent generation method, relates to the technical field of computer software, and comprises the following steps: front-end rendering: the front end renders the work order data page by combining a headless browser with a Vue framework and an ElementUI component library, and dynamically displays structured work order details through a responsive data binding mechanism; data fragmentation: large work order data sets are split into N subtasks based on a dynamic fragmentation strategy; and small PDF files are generated in parallel: a containerized rendering cluster based on Kubernetes deployment management is used to allocate rendering tasks to each container; the small PDF files generated by the application through careful design with the help of the Vue and ElementUI frameworks are more attractive in terms of text layout, color matching and graphic display, and the large file after merging is more beautiful than the file generated by a traditional back end, thereby improving user experience.

The embodiment of the application relates to the application field of storage devices, and discloses a flash memory management method and a flash memory device, the flash memory management method comprises the following steps: acquiring a logical word line address corresponding to each logical unit in at least one logical unit; and searching a mapping table according to the logical word line address corresponding to each logical unit to determine a physical word line group corresponding to a logical word line of each logical unit. The application can map the logical word line and the physical word line group by using the mapping table, the physical word line group comprises at least one physical word line, the number of data pages included by at least two physical word lines is not completely same, so that the application can adapt to different types of flash memory particles, and the compatibility of the flash memory device to the flash memory particles is improved.