40results about How to "Reduce copying time" patented technology

High speed differential copy can be implemented in the fail-back after disaster recovery when the data of the primary site is protected safely. When a restore command is issued, the common snapshots of the snapshots of the primary site and the secondary site are extracted as the base snapshot by comparing the log tables of the primary site and secondary site. The volume of the primary site is rolled back with the extracted snapshots. The latest snapshot of the volume of the secondary site is transmitted to the primary site and it is applied to the volume of the primary site to synchronize the volumes of the primary site and the secondary site.

A network printing system to copy setting information and a method of copying setting information. The network printing system comprises a source image forming apparatus to store setting information, at least one terminal to receive the setting information from the source image forming apparatus and to store the setting information if a command to copy the setting information is input, and a plurality of target image forming apparatuses to communicate with the at least one terminal to copy the setting information stored in the at least one terminal.

The invention discloses a network data processing method based on a graphic processing unit (GPU) and a buffer area. The method is characterized in that: a pretreatment thread in a pretreatment thread group carries out pretreatment uninterruptedly to received network data packets so as to form a calculating task which is sent to the buffer area; a calculating thread in a calculating thread group takes out one calculating task uninterruptedly from the buffer area and gives CPU to carry out calculation or takes out a plurality of the calculating tasks for the GPU to carry out the calculation, and then a calculation result is sent to a subsequent thread group; a subsequent processing thread in a subsequent processing thread group carries out subsequent processing uninterruptedly to the calculation result sent by the calculating thread of the calculating thread group after completing the calculating task. The invention also discloses a network data processing system based on the GPU and the buffer area. In the invention, through simultaneous working of a plurality of calculating threads, a data copy and pipelining executed by a GPU kernel function can be achieved. A calculating capability of the GPU can be fully used. The high speed calculating and processing network data can be realized. By using the method and the system, network load can be dynamically adapted and a processing delay is low.

The invention discloses a data recovery method and device and belongs to the field of data storage. The method includes the steps of receiving a data recovery command which includes a target snapshot time point through a first storage device, confirming that data stored in a logic address are data written to the first storage device after the target snapshot time point, obtaining historical data, and sending the historical data and the logic address to a second storage device. By receiving the data recovery command which includes the target snapshot time point through the first storage device, confirming that the data stored in the logic address are the data written to the first storage device after the target snapshot time point, and sending the historical data and the logic address to the second storage device, the problem that in the prior art, all data in a main storage device are required to be copied to storage devices is solved, and the purposes that copy time is reduced, and broadband resources are saved are achieved.

The invention provides a data copying management device and a data copying method of the data copying management device. The data copying method comprises the following steps that a Hash algorithm is adopted for obtaining the Hash values of a plurality of source data blocks formed by source data sub blocks; the Hash values are sent to a target storage side so that the target storage side judges whether the source data blocks are directly generated by the target storage side or the source data blocks are sent to the target storage side by the source storage side on the basis of the received Hash values; when the first feedback fed back by the target storage side is received, the source data blocks are ignored; when the second feedback bed back by the target storage side is received, the source data blocks are sent to the target storage side. Through adopting the mode, the copying speed on the special data blocks can be accelerated, so the CPU (central processing unit) and the network resources are saved, and the copying time is reduced.

A method for copying data includes preparing a source data media with a numbers of effective data and a numbers of base data, fetching one batch of data from source data media and setting size of fetched data to be as the same as base data, comparing fetched data with base data and copying data to at least one object media if two compared data are not the same or otherwise not carrying out copy operation, fetching next batch of data and repeating above said steps till data in copy region of source data media is completely copied onto object media.

The embodiment of the invention provides a data management device and management method, and a data management system, and relates to the technical field of data management. The data management deviceincludes: a map information generation portion for generating map information on the basis of sector position information for displaying a position where the data is located in a main driver, whereinthe map information displays a sector address as a copy object; a mirror data generation portion for reading sector data at a designated address in the main driver according to the map information, and generating mirror data on the basis of the read sector data; a write-in portion for writing the sector data in a designated address of a large main driver on the basis of the mirror data; and an indication portion for indicating the sector address showed in the mirror data to a duplicator, wherein the duplicator is used for writing data read from the large main driver in a target driver. The data management device can greatly shorten the data reproduction time.

The present application provides a method, an apparatus and a device for data backup. The method comprises the following steps: judging whether the data in the data block corresponding to the index ofthe first data block is the same as the data in the data block corresponding to the index of the second data block; the data block corresponding to the index of the first data block being a data block to be copied, and the data block corresponding to the index of the second data block being a copied data block. If the data in the data block corresponding to the first data block index is the sameas the data in the data block corresponding to the second data block index, sending duplicate information to the target end device, the duplicate information indicating that data in the data block corresponding to the first data block index is duplicated with data in the data block corresponding to the second data block index. The present application reduces the occupancy of link resources.

A data transform apparatus transforms four integer data D0-D3 into one DC coefficient Y0 and three AC coefficients Y1-Y3 as lossless-Hadamard transform coefficients. A first calculation unit group adds date D0 to respective data D1 to D3. A first shifter shifts data D0 1 bit to the left. A second calculation unit group subtracts three data calculated by the first calculation unit group from output of the shifter. A second shifter halves a calculation result of the second calculation unit group by shifting the subtraction result 1 bit to the right, and executes round processing for truncating a fractional part of the halved data. A sign inverter inverts the sign of output from the second shifter, and outputs it as DC coefficient. A third calculation unit group subtracts output from the sign inverter from output of the first calculation unit group, and outputs these data as AC coefficients.

A virtual machine image cloning method and system based on the qcow2 format, the method comprising the steps of: creating a template image file in the qcow2 format; creating at least one image file in the qcow2 format; Set as a template image file in qcow2 format; create and run a virtual machine based on each image file in qcow2 format; store the modified data of the virtual machine in the corresponding image file in qcow2 format, so that the copying time of the virtual machine image file Greatly shortened, while saving storage space.

The invention relates to a chip data copying device and method. A logic control unit is adopted to analyze all partitions of a master slice, master slice analysis result files are obtained, participation of a processor is reduced, the data processing speed can be increased, copying is executed through the logic control unit, the data cache space of the processor is not needed, the hardware cost is saved, the data processing speed is further increased, the processor can be matched with a master slice analysis result file for copying, the copying data size is effectively reduced, the copying time is shortened, the logic control unit can achieve different chip communication protocols, and therefore data copying among various protocol chips is supported, therefore, a corresponding chip data copying device can use the bandwidth of a chip hardware bus to the maximum extent, and the purpose of increasing the data copying speed of a high-capacity chip is achieved.

The invention discloses a method, a system and device for incrementally synchronizing two places and three centers of a ring, and a storage medium. The method comprises the following steps: starting asynchronous/active remote replication relationship between a production volume and a first disaster recovery volume; in response to the fact that the production volume receives the data, updating a first bitmap of the production volume according to the data; starting a periodic asynchronous remote replication relationship between the first disaster recovery volume and the second disaster recoveryvolume, and synchronizing the first disaster recovery volume and the production volume according to the first bitmap; updating a second bitmap of the production volume based on the first bitmap in response to the failure of the first disaster recovery volume or the failure of a link between the production volume and the first disaster recovery volume; and starting a backup period asynchronous remote synchronization relationship between the production volume and the second disaster recovery volume, and performing incremental synchronization on the second disaster recovery volume based on the second bitmap. Incremental synchronization of backup period asynchronous remote replication in annular two-place three-center can be realized, repeated data replication is reduced, and the time for copying a production volume to a second disaster recovery volume is shortened.

The invention discloses a file copying method and device and a readable storage medium. The method disclosed by the invention is applied to a server, and comprises the following steps: receiving a request of copying a scientific data source file sent by a client; if the scientific data source file is stored in the high-speed storage pool serving as the nonvolatile memory of the server, copying thescientific data source file to the client according to the server record table, and updating the server file state of the scientific data source file recorded in the server record table; determininga directory to which the scientific data source file belongs, storing other files in the directory to a high-speed storage pool, and recording server file states of the other files in a server recordtable so as to copy the other files to the client according to the server record table when a request for copying the other files is received. According to the method, the copying efficiency is improved, and copying errors can be avoided. The invention also provides a file copying device and a readable storage medium, which also have the above technical effects.