45results about How to "Improve the efficiency of reading data" patented technology

The invention provides an embedded file system-based reading method for streaming data. The method comprises the following steps: receiving a request for reading the streaming data, creating a reading task for the request when the requested streaming data exist in a disk, distributing storage space for the new reading task and initializing relevant parameters; decomposing the reading task into a plurality of subtasks, wherein each subtask is responsible for reading a piece of physically continuous data, and caching the data; fetching the data from subtask cache, performing encapsulation according to the format of the streaming data, submitting to a calling party of the reading task after a piece of data is encapsulated each time, and releasing the subtask after data submission is competed and triggering the next subtask; when all the subtasks are successfully finished, reporting that the tasks are normally finished to the task calling party, and waiting the task calling party to end the current reading task. According to the embedded file system-based reading method provided by the invention, high-throughput and high-concurrence reading of the streaming data is facilitated, and the problem that the concurrence performance of a server is low when a large number of users visit hot data is effectively solved.

The invention discloses a method and a device for reading data, which belong to the technical field of computers. The method comprises the following steps: determining a head-pointer position and a tail-pointer position of a channel; comparing the height of the head-pointer position and the height of the tail-pointer position; and sequentially reading a data packet according to a comparison result. The device comprises a determining module, a comparing module and a reading module. According to the invention, through sequentially reading the data packet, the times for reading the data can be reduced; and in addition, since the times for reading the data is reduced, the efficiency for reading the data can be improved, and thus the probability that data overflow from the channel is reduced.

The disclosure relates to a method and device for data reconstruction, and belongs to the technical field of data storage. The method includes: determining at least one data block to be reconstructed; determining the priority of the at least one data block according to the current attribute of the at least one data block; according to the priority of the at least one data block, and the the stripe to which each data block in the at least one data block belongs, and determine at least one stripe to be reconstructed and the priority of each stripe in the at least one stripe; according to the determined stripe to be reconstructed The priority of at least one stripe is to perform data reconstruction on the data block to be reconstructed included in the at least one stripe. With the present disclosure, the efficiency of reading data can be improved.

The invention discloses an encryption copy organization method under a distributed storage environment. In the method, the management unit data block of system data is divided into a plurality of data segments with the same size; the system carries out management by taking the block as the unit; and a client side encrypts the data by taking the data segment as the unit so as to provide finer granularity control to the data block. Because the data block is encrypted by segments, the ciphertext data segments have no dependence and can be encrypted and decrypted in parallel so as to avoid the phenomenon that read-write of small data amount brings great cost for carrying out encryption and decryption on the whole data block; for read of a large data amount, read requests are grouped, and different grouping requests are sent in parallel to each storage node maintaining a requested file data block copy; and each grouping is read in parallel to improve the efficiency of reading data. The invention realizes that the encryption technology and the copy technology are applied in the distributed storage environment. The provided encryption copy organization method greatly improves the efficiency of reading and writing data.

The invention provides a thermal flying-height control slider for a hard disk drive. In the thermal flying-height control slider, according to a principle that the read-write magnetic head area of the slider can be subjected to thermal expansion so as to further reduce flying height by electrifying a write coil in a magnetic head write process, a microheater is additionally arranged at a selected middle position of a read-write magnetic head on the hard disk slider, and a unique and efficient W-shaped microheater structure is designed. By means of the structure, the magnetic reading head can obviously move downwards in a read operation process, the flying height of the hard disk magnetic head in the read operation process is decreased, and the precision and the efficiency of data read are increased.

The embodiment of the invention provides a data reading method and device, electronic equipment and a readable storage medium. The method comprises the following steps: setting a machine room identifier for each data storage node DN in the HDFS, and setting a copy distribution attribute for to-be-backed-up data; determining a target machine room corresponding to the machine room identifier, and selecting a data storage node DN with the copy number from the target machine room; storing the data to be backed up in the selected DN; when a data reading request which is sent by a client and aims attarget data is received through an NN, sending DN identifiers of all DNs storing the target data to the client through the NN; determining whether the machine room identifier of each DN storing the target data is the same as the machine room identifier of the client through the client; and reading the target data from the target DN under the condition that the client determines that all the DNs comprise the target DN of which the machine room identifier is the same as the machine room identifier of the client.

The invention discloses an oblique scan display method in a direct writing photoetching system. N2 rows of data are combined and stored in a memory in sequence according to an obliquity factor N and on the basis of left-justified N rows and N lines of pixel data, and an FPGA (field programmable gate array) selects the data in the corresponding rows in sequence according to the platform motion to a DMD (digital micro-mirror display) to display. According to the invention, the data are stored in a DDR2 (double data rate 2), the DMD is controlled by the FPGA, and the oblique scan display is a method for updating an image according to the obliquity factor and a platform scanning manner, so that the operating mode of the FPGA can be conveniently designed and optimized, and the data reading efficiency of the DDR2 can be improved.

The embodiment of the invention provides a data reading method and apparatus, applied to a main control board of a network device. The method comprises the following steps: receiving an MIB information request sent by an NMS; reading data from the main control board according to the MIB information request, wherein the data read by an MIB node from an interface board are stored in the main controlboard; and sending the read data to the NMS. By application of the embodiment of the invention, the SNMP networking data reading efficiency is improved.

A data reading method and device. The data reading method comprises: during a process of scanning an index clustering table, scanning leaf nodes and recording page numbers of the leaf nodes (S10); and merging I / O requests of the leaf nodes with consecutive page numbers into one I / O request (S11). Because data of multiple leaf nodes in physically consecutive storage locations is read by means of one I / O request, the data volume read by each I / O request is increased, thereby fully utilizing the overall disk throughput. In addition, to read data of the same storage volume, the number of I / O requests that need to be initiated can be reduced, thereby avoiding the limitation of the disk IOPS parameter, and effectively improving the data reading efficiency.

The invention provides a data caching method and device to solve the problem of low data caching efficiency in the prior art. Including: obtaining the first read cost used to indicate the time required to read a piece of data from the disk, and the second read cost used to indicate the time required to read a piece of data from the preset memory; obtain the disk The first space occupancy and the number of accesses of each disk file in the multiple disk files stored on the computer; the first space occupancy is used to characterize the storage space occupied by hot data in the disk file; according to the first read cost, the second 2. Read cost, first space occupation and access times of each disk file, determine the access cost of each disk file; determine among multiple disk files according to the first space occupation and access cost of each disk file Output the disk file to be cached, and cache the hotspot data in the disk file to be cached to the preset memory.

The present application discloses a data readdir method, system, device and computer medium, which are applied to a server in a distributed file system to receive a data readdir request sent by a client in the distributed file system; determine each corresponding data readdir request Target metadata server; split the data readdir request into data readdir sub-requests corresponding to each target metadata server; concurrently send data readdir sub-requests to the corresponding target metadata server; receive the target data transmitted by each target metadata server and transmitted to the client. The data readdir method, system, device and computer-readable storage medium provided by the present application improve the efficiency of data read by a client by concurrently sending data readdir sub-requests to a corresponding target metadata server.