147results about How to "Reduce the number of reads and writes" patented technology

The invention is applied to the technical field of storage, and provides a method and system for data caching of a solid state disk. The method for the data caching of the solid state disk comprises the following steps: setting a part of memory of a system memory as a data buffer cache of the solid state disk; caching read and write data of the solid state disk into the data buffer cache of the solid state disk. Therefore, the method and system of the data caching of the solid state disk reduces the visit times of the solid state disk and lengthens the service life of the solid state disk.

The invention discloses a method and a device for acceleratively starting an operating system and a method, a device and a terminal for generating prefetched information, and belongs to the field of operating systems. The method for acceleratively starting the operating system includes acquiring at least one piece of prefetched information, which contains file paths of data blocks required by a process, deviation values and length values, of the to-be-accelerated process in a starting procedure of the operating system; and setting positions which are indicated by the file paths and the deviation values as starting positions according to the prefetched information, reading the data blocks with the reading lengths equal to the length values into a cache of the system, and completing the starting procedure of the process by the aid of the data blocks in the cache of the system. By means of prefetching the data blocks required by the integral or partial process in the starting procedure, frequency of page faults in the starting procedure and read-write frequency for a low-speed memory are greatly reduced, starting time of each process corresponding to a program can be effectively shortened, and the effect of remarkably increasing the starting speed of the operating system is achieved.

The method includes procedures: (1) establishing hash table on software layer; the hash table records indexes for list items of each route; (2) looking up the hash table to obtain needed index of list item; (3) based on having looked indexes of list items of routes to search route table of hardware; based on searched result to carry out deletion or insertion. Maintaining a hash table of recording indexes for list items of each route through software, when looking up, inserting, or deleting list items of route, the invention first obtains indexes for list items of the route in corresponding TCAM table through looking up hash table in software; and after having looked the corresponding list item, the invention prevents reading list item of hardware route item by item in each time. Through reducing time to read/write route item of hardware, the invention raises performance of system, and lowers cost.

The invention discloses a method and device for processing geographic information vector data. The method includes the steps of converting the vector data in an external format into vector image layer data, wherein the vector image layer data comprise image layer basic information, image layer metadata information and geographic target data, and the geographic target data comprise geographic target attribute information, geographic target index information and geographic target vector data; using the vector image layer data as a storage unit, and computing an outer covering frame range of the storage unit; storing the image layer basic information, the image layer metadata information, the geographic target attribute information, the geographic target index information and the outer covering frame range of the storage unit into a relation database; storing the geographic target data in the storage unit into a distribution key value database. According to the method and device for processing the geographic information vector data, the geographic information vector data storage efficiency and the geographic information vector data inquiring efficiency can be effectively improved.

The invention discloses an LDPC (low density parity code) layering BP (belief propagation) decoding algorithm based on a least-mean-square-error criterion. In the algorithm provided by the invention, the complexity of algorithm implementation is reduced through constructing a linear equation to approach to the operational formula at a check node in the BP algorithm, and the decoding performance of the algorithm is improved by utilizing the least-mean-square-error criterion to solve the optimum solution of a linear equation coefficient. Simultaneously a layering decoding idea is introduced into the algorithm, the convergence of the algorithm can be improved, and the requirement on the memory space is reduced. Based on the algorithm, the invention provides a LDPC decoder structure provided with a partial parallel structure and used for a multimedia wireless sensing network. The decoder supports the decoding of the LDPCs with various code lengths and code rates, and has the advantages ofless system resource occupation, high data throughput, low system power consumption, and the like.

The embodiment of the invention discloses GNSD (Global Navigation Satellite System) solid-state drive equipment and a data read-write method based on the same, and the solid-state drive equipment comprises a flash memory for storing first data, an SSD DRAM used for storing the mapping table and the second data; a DRAM translation layer (DTL) used for controlling access to the SSD DRAM; a controller used for determining that the read data is stored in the SSD DRAM and/or the flash memory according to the mapping table when the host reads the data and also used for storing the written data intothe SSD DRAM or the flash memory according to the number of the available DRAM entries in the mapping table when the host writes the data. By adopting the method and the device, the writing and erasing times of the flash memory can be effectively controlled, so that the durability of the flash memory is improved.

Disclosed in the embodiments of the present invention are a data reading and writing method, a memory controller and a computer, relating to the field of storage, reducing flash chip loss and efficiently improving storage performance of a system. The specific scheme is as follows: a first write command sent by a software layer controller is obtained through a first reading and writing interface, wherein the first write command comprises a characteristic value of first data and the first data to be written; according to the characteristic value of the first data, the first data is cached into a first storage unit using a predetermined write policy, and a reference count value of the first data in the first storage unit is updated, wherein the reference count value of the first data records the read and write times for the first data in the first storage unit; when a writing indication for the first data is detected, all the first data cached in the first storage unit is written to a second storage unit. The present invention is used in the process of data storage.

The invention discloses a tax disk which comprises a tax disk hardware system and a tax disk software system, wherein the tax disk hardware system comprises a main control chip, a clock module, a power supply module, a storage, a register and a USB (Universal Serial Bus) interface protector which are connected with the main control chip, wherein the power supply module is also connected with the clock module; the tax disk software system comprises a hardware interface layer, a file system management layer, a safety management layer, a tax application layer and a communication interface layer which are connected with the tax disk hardware system; and a three-level index technology is adopted in the file system management system to index invoices. Compared with the traditional tax control device, one tax disk can complete the services of invoice purchasing, invoice making, invoice cancellation, tax copying and the like without other card readers or storage card devices, and can simultaneously support national tax and regional tax, wherein each tax application supports dozens of invoice types.

The invention discloses a magnetic disc data protection method, which comprises: receiving a magnetic disc operation request, and counting the degree of access heat of a requested vector; when the degree of the access heat of the requested vector meets a hot point requirement, copy is unavailable and the free space of the magnetic disc is greater than a preset free space threshold, generating a copy of the requested vector; and when the data in the requested vector and the data in the copy of the requested vector are consistent during reading and writing operation, selecting a vector which is at the shortest distance to the current position of a magnetic head for operation, or when the data in the requested vector and the data of the copy of the requested vector are inconsistent, selecting the vector with the latest data from the two vectors for operation. When the hot vector or the copy of the hot vector has a fault, data in a mirror sector are used for restoring the failed vector. In the invention, the fault probability of the hot vector is reduced by reducing the reading and writing times of the vector and the reliability of the data in the hot vector is guaranteed; meanwhile, while the system request is responded to, the data at the shortest distance to the magnetic head are fed back, so higher reading and writing performance are provided.

The invention discloses an index combining method and an index combining device. The index combining method comprises the following steps: determining whether not less than n sub-indexes of which the sizes meet preset combining conditions based on a preset reference exist in an index base or not, wherein n is an integer and is greater than or equal to 2, and the preset reference is related to thesizes of the preset sub-indexes; if the sub-indexes exist, taking the determined sub-indexes as a sub-index set; if the sub-indexes in the sub-index set are combined, computing the sizes of new sub-indexes to be acquired; searching not less than m sub-indexes of which the sizes meet the preset conditions based on the reference related to the sizes of the new sub-indexes in residual sub-indexes, wherein m is the integer and is greater than or equal to 1; if the sub-indexes are searched, adding the searched sub-indexes into the sub-index set, and executing the computing step and the searching step to the new sub-index set; and if the sub-indexes are not searched, combining the sub-indexes in the sub-index set. The method and/or the device of the invention can be used for obtaining relatively stable optimized system performance under dynamic text set environment.

The present invention provides a blocking storage system of video monitoring data. The system is characterized by comprising: a memory used for storing video monitoring data and provided with a continuous storage space; a data block conversion unit, used for dividing each-path data of multi-path video monitoring data into at least one data block, and communicating with the memory in a unit of data blocks; and a serial communication unit, used for storing the data blocks into the continuous storage space sequentially in a serial communication manner or reading the data blocks from the continuous storage space. According to the storage system of the video monitoring data provided by the present invention, the problems of lowering read/write efficiency of a disk and reducing service life of the disk, which are caused by keeping moving a head of the disk to perform a positioning write operation by a parallel processing mode of the disk when multi-path videos are written, are avoided.

The invention discloses a terminal, an application data processing method, a data processing device and a storage medium. The terminal comprises a memory, a non-volatile memory NVM buffer, an exchangepartition, a memory controller MMU and an I/O controller. The memory includes a plurality of memory pages, the NVM cache includes a plurality of cache pages, and the swap partition includes a plurality of page slots. The MMU is used for controlling the application data of the memory page and/or the application data of the buffer page to be transmitted between the memory and the NVM buffer throughthe memory bus. The I/O controller is configured to control application data of a page slot and/or application data of a cache page to be transmitted between the switching partition and the NVM cachethrough an I/O bus. The method provided by the embodiment of the invention improves the data exchanging speed in the memory, reduces the response time of the application program, prolongs the life ofthe exchanging partition, and reduces the page jitter caused by the application data frequently moving in the memory page and the page slot in the prior art.

The invention aims to provide a method and equipment for optimizing storage efficiency of a storage device of an embedded terminal in peer-to-peer (P2P) application. The method comprises the following steps of: receiving downloaded data of P2P downloading application by the embedded terminal; storing the downloaded data in the embedded terminal and a downloading cache corresponding to the P2P downloading application; detecting whether a first trigger condition for writing the downloaded data in the downloading cache into the storage device of the embedded terminal is met; and when the first trigger condition is met, writing the downloaded data in the downloading cache into the storage device to release the downloading cache. Compared with the prior art, by introducing the cache, the read-write frequency of the storage device of the embedded terminal is reduced, the storage efficiency of the embedded terminal in the P2P application is optimized, the damage to a hard disk is reduced, and the service life of the embedded terminal is prolonged.

The invention discloses a data fragmentation transmission method and device and computer equipment, and the method comprises the steps: respectively distributing a unique identification code for each target fragmentation file; according to the unique identification code of each target fragmentation file, obtaining meta attribute information of each target fragmentation file; determining an original arrangement sequence of each target fragment file according to the meta-attribute information; when a fragment merging request is received, generating a merged meta-attribute information list according to the original arrangement sequence and the meta-attribute information of each target fragment file. By implementing the method and the device, the problem that the throughput capacity of the server is poor due to the fact that the data read-write frequency is high in the related technology is solved, logic combination of the fragmented files is realized by combining the unique identification codes allocated to the fragmented files and the generated combined element attribute information list, a new file does not need to be generated by splicing, the seriality during file uploading can be ensured, the operation steps are simplified, and the data throughput capacity of the server and the user experience are improved.