37results about How to "Shorter read and write times" patented technology

The invention relates to the field of block chains, and discloses a data storage method and device, computer equipment and a storage medium.The method comprises the steps of newly establishing a transaction, wherein the transaction comprises a plurality of adding instructions; before the transaction is finished, adding a newly-added temporary node according to the adding instruction; after the transaction is finished, splitting the newly added temporary node into a plurality of split nodes, and calculating hash values of the split nodes; updating the key value pair list of the target father node, and judging whether the length of the key value pair list of the target father node exceeds a second preset threshold value or not; and if yes, continuing to split the target father node until thekey value pair list lengths of all nodes do not exceed respective corresponding preset thresholds. Through asynchronous processing of transaction processing and node splitting and coupling of node splitting and hash calculation, the transaction processing efficiency can be improved, the IO frequency of paths and index values of a transaction type Merkel B + tree is reduced, and the disk read-write time is shortened.

The invention provides a data read-write method, a read-write device and a dynamic random access memory. The method includes: entering a page read-write mode according to a mode selection command, wherein the page read-write mode command is configured through a mode register of the dynamic random access memory; receiving page read-write commands, wherein the page read-write commands comprise a page read-write enable command and a cross read command, the page read-write enable command is configured through a first reserved bit of a read-write command of the dynamic random access memory, the cross read command is configured through a second reserved bit of the read-write command of the dynamic random access memory, and the cross read command is used for controlling cross read-write data in aplurality of storage block groups; and executing cross page read-write operation according to the page read-write command.

The invention relates to a method for quickly displaying a monomer model in massive geographical information three-dimensional models. The method comprises the following steps of (1) constructing the geographical information massive three-dimensional models; (2) constructing quick searching units; (3) constructing unique ID (identifications) of the quick searching units; (4) displaying the monomer model. The quick searching units in a region covered by a window display range can be quickly calculated; the searching and calculating speed can be increased by tens of thousands of times by finding out the required monomer three-dimensional model from the quick searching units; high-efficiency displaying of the massive geographical information three-dimensional models can be also realized even through a general commercial PC (personal computer) machine.

The invention discloses an audio and video encryption protection on-demand method, an audio and video encryption protection on-demand device and electronic equipment, and aims to solve the problems that in the prior art, the content of a playing end is easy to leak, the volume of an encrypted file is increased, and audio and video files need to be re-coded and re-decoded in encryption and decryption operation, so that the operation is time-consuming and labor-consuming. And the requirement on hardware is high. The video-on-demand method comprises the following steps: S1, encrypting and decrypting audio and video contents; s2, authorization of the cloud authorization center; and S3, client-side video-on-demand. According to the on-demand method and device and the electronic equipment, cache files are not generated in the on-demand process, file reading and writing time is shortened through file copying, destructive processing is carried out on each frame so that it can be guaranteed that audio and video file content is not read normally, the problem of content leakage of a playing end is prevented, the file transmission bandwidth requirement is low, and the file transmission efficiency is high. Time consumed for playing audio and video files to a player is short, playing and storage are both under authorization protection, content leakage is prevented, and the rerecording scene and time are further traced through rerecording watermarks.

The invention provides a DICOM image processing method and a server. The method comprises the steps of: receiving to-be-processed DICOM file data transmitted by a terminal, wherein the DICOM file datainclude multiple DICOM files; generating, according to the DICOM file data, staged result data information, wherein the staged result data information includes one or more than one piece of staged data; writing each piece of staged data in the staged result data information into one corresponding staged result data file for storage. Staged result data information is generated based on the plurality of DICOM files transmitted by the terminal, and each piece of staged data is rewritten into one corresponding staged result data file for storage, so that the plurality of DICOM files are rewritteninto large files for stage and network transmission time and disk reading-writing time are effectively reduced.

The invention discloses a method for visually storing massive seismic data, comprising: 1. expanding the post-stack three-dimensional seismic data body as a cube, and using the obtained cube array as a primary expansion block; 2. defining unit blocks, and dividing the primary expansion block into The cube array is composed of unit blocks, and the seismic data volume is divided according to the unit blocks; 3: plan the multi-scale structure, and establish the multi-resolution seismic data volume; 4: define the file format, and create a new 3D seismic data volume file according to the defined file format; 5 : Data visualization storage, convert the seismic data in seg‑y file format into a new 3D seismic data volume file, and design a data caching strategy to visually store the converted 3D seismic data volume file. The invention proposes a post-stack large-scale three-dimensional seismic data volume file format suitable for multi-directional and multi-scale reading and writing with block and hierarchical storage with balanced performance, which can store large-scale three-dimensional seismic data volumes and perform efficient reading and writing.

The present invention provides a data reading and writing method, a reading and writing device and a DRAM. The reading and writing method includes: entering a page reading and writing mode, and the page reading and writing mode is configured through a reserved bit in a mode register of the DRAM . A page read / write command is received, including a page read / write enable command, and the page read / write enable command is configured through a reserved bit of the read / write command of the DRAM. Perform page read and write operations according to the page read and write commands. The reading and writing method of the present invention enables each reading and writing command to read and write a large amount of data, reduces the number of times of sending the reading and writing commands, improves the reading and writing speed, and reduces power consumption.

The present invention discloses a crash analysis method and system for binary programs, including steps: S1, information collection and processing, in this step, the instrumentation module performs code instrumentation on multiple key positions and basic blocks, and then runs the program , record information; the taint module takes the program input as taint, tracks the spread of taint during program execution, and at the same time, performs symbolic operation on each executed instruction, and finally performs reverse slice from the crash point according to the symbolic content , record information; S2, analyze based on the data processed in step S1, and obtain the program execution trajectory diagram, stain propagation trajectory diagram and crash causes, etc.; the present invention can analyze the program without source code, and collect the program running Crash information, crash backtracking, locating the crash point, determining the cause of the crash, etc., greatly reduces the cost of manual analysis, and can assist vulnerability analysts to quickly determine the mechanism of the program crash.

The invention provides a data reading and writing method, a reading and writing device and a dynamic random access memory, which enters a page reading and writing mode according to a mode selection command, and the page reading and writing mode command is configured through the mode register of the dynamic random access memory; receiving page reading The write command includes a page read-write enable command and an interleave read command, the page read-write enable command is configured through the first reserved bit of the read-write command of the DRAM, and the interleave read command is configured through the The second reserved bit of the read and write command of the dynamic random access memory is configured, and the interleave read command is used to control the interleave read and write data in a plurality of memory block groups; according to the page read and write command, perform the interleave Page read and write operations.

The present invention proposes a cache system based on non-volatile memory and software RAID, which is characterized by a novel storage system architecture integrating non-volatile memory Apache Pass, software RAID and Device Mapper driver module Buaacache. The invention utilizes the Device Mapper mechanism of Linux to manage the software RAID, and uses the high-speed device Apache Pass as the Cache of the low-speed RAID, thereby constructing a two-level cache system. Persistent Memory has the characteristics of no loss of media data after power failure and excellent read and write performance. The present invention selects Persistent Memory as the high-speed cache of the software RAID, and realizes that the reading and writing performance of the software RAID is close to or even exceeds that of the hardware RAID under the condition that the cost is far lower than that of the hardware RAID.

The invention discloses a rapid-reading-writing electric-power-system PQ-decomposition-method flow data storage method based on the sparse technology.The method includes the step that nonzero elements at the upper triangles and the lower triangles of arrays of Y(n, 2n), B'(n-1, n-1) and B''(m, m) in a traditional method are stored into an A(n, d) array formed by three virtual arrays of Y(n, d<1>), B'(n-1, d<2>) and B''(m, d<3>).The number of storage units is greatly decreased, the reading-writing speed of a data file and the calculating speed of I<pi> or I<qi> or P or Q during PQ-decomposition-method flow calculation are increased, the number of the storage units is also greatly decreased, and efficiency is greatly improved.Compared with the traditional method, the method has the advantages that as for an IEEE-118 node system, the largest number of the storage units is only 14.69% of that of the traditional method, the practical number of the storage units is only 6.66% of that of the traditional method, the data file writing time and the data file reading time are 14.32% and 7.29% of the data file writing time and the data file reading time of the traditional method respectively, and the larger the number of nodes is, the more obvious the advantages of the method are.

The invention discloses a mapping management method based on a phase-change memory and a solid-state hard disk, which is characterized in that two-level mapping tables are used for management, specifically including a first-level table and a second-level table, and the second-level table is stored in a phase-change memory PCM , the secondary table records the relationship between logical addresses and physical addresses of all user data pages, the secondary table is divided into multiple secondary table subunits according to the granularity G, and the cache of the hard disk controller is divided into secondary table subunits The basic unit performs data replacement. By introducing phase-change memory to store the mapping table, the read and write time of phase-change memory is much lower than that of NAND. This patent introduces phase-change memory in NODRAM solid-state hard disk instead of NAND to save the complete mapping table, reducing the mapping time in the on-chip SRAM. The table cache replaces the time for mapping table information, thereby reducing the completion time of read and write commands and improving read and write performance.