84results about How to "Improve replication efficiency" patented technology

The invention discloses a file data replication method for quick deduplication. The method comprises the following steps of: before a first target file in a storage medium is wholly replicated to a target file directory for the first time, performing fingerprint calculation on metadata information of the first target file to form identity (ID1) by a processor, extracting contents of a plurality of file data segments from the first target file according to an interval with preset size and performing the fingerprint calculation to form ID2, performing the fingerprint calculation on the metadata information of a second target file to form ID3, and extracting contents of a plurality of file data segments from the second target file according to an interval with preset size and performing the fingerprint calculation to form ID4; comparing the ID1 with the ID3; if the ID1 is the same as the ID3, saving replication; if the ID1 is different from the ID3 and the ID2 is the same as the ID4, updating metadata of the first target file; and if the ID2 is different from the ID4, wholly replicating the second target file.

The invention discloses a heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines. The system includes a source database, a target database and a replication system. The system and method have the advantages that for preventing destination-end events from execution failure, a traditional data replication system based on logs serially executes logs of various events according to the time sequences (LSN numbers) of the logs and does not consider the probability of the parallel execution of events. According to the system and method, commit-point timelines are adopted to form fences, the characteristic that all upload operations between two timelines do not colloid with one another is adopted, the operations are executed at the destination end in parallel, the replication efficiency is greatly improved, and the technical problem of the low replication efficiency caused by the serial execution of events in the target database is solved.

A data replication method and a storage system are provided. The method is applied to a storage system including a first storage device and a second storage device. According to the method, after determining replication information, a first storage system determines a first replication sub-information and a second replication sub-information according to the replication information, where the replication information is used to indicate data that needs to be replicated by the first storage system to a second storage system in a current replication task. Then, the first storage device replicates data to the second storage system according to the second replication sub-information, and the second storage device replicates data to the second storage system according to the second replication sub-information. According to the data replication method, efficiency of replication performed between the first storage system and the second storage system can be improved.

The invention relates to construction and application of recombinant nucleocapsids of Cap genes of porcine circovirus expression type 2 nucleocapsid protein, belonging to the genetic engineering bacterin field. C-terminal gene fragments of porcine parvovirus (PPV) VP2 genes are cloned into a type 5 adenovirus shuttle vector of the human beings, and recombinant adenovirus rAd-deltaVP2 is obtained; deltaVP2 proteins are expressed successfully and highly efficiently and can be self-assembled into the nucleocapsids [PPV:VLPs]; the PPV VP2 nucleocapsids are used as antigen transport vectors and 165 to 200 sites of amino acid (deltaCap) genes of the porcine circovirus type 2 (PCV2) nucleocapsid proteins (Cap) are embedded into an N-terminal (deltaVP2) of the PPV VP2, and then recombinant adenovirus rAd-deltaCap-deltaVP2 is obtained; embedded VP2 (deltaCap-deltaVP2) proteins are expressed successfully and highly efficiently and can be self-assembled into nucleocapsids [PPV:VLP(PCV2)]. The invention also relates to application of the recombinant virus and recombinant PPV VP2 nucleocapsids of the expression Cap genes of the recombinant virus in the aspects of bacterin immunity and so on.

The invention provides a remote replication method of a file system. The remote replication method comprises the following steps: A) identifying a file which is changed in the current period in a source file system; B) getting an expansion region which is changed in the source file system and generating incremental data to be synchronized; and C) synchronizing the incremental data to a target file system. As only data blocks which are changed are transmitted during a replication process according to the method provided by the invention, the quantity of the data to be transmitted is greatly reduced and the replication efficiency is improved.

The invention provides a data editing method and device based on a clipboard. The method comprises the following steps: receiving a pasting operation instruction, and showing all data in the clipboard; selecting the to-be-pasted data in the clipboard and editing the to-be-pasted data; and pasting the edited data. In the data editing method and device based on a clipboard provided by the invention, the shortcoming in the prior art that the data cannot be copied between different applications is overcome, and the data in the clipboard is selected in a data copying process between different applications; and meanwhile, the data editing is realized in the copying process, the data copying efficiency between different applications is improved, the editing time in the data copying process is effectively shortened, and the user experience is enhanced.

The present invention provides cell fusogenic vectors having replicative ability, whose protease-dependent tropism has been modified. M gene-deficient viral vectors encoding modified F proteins, in which the cleavage site of the F protein of paramyxovirus is modified to be cleaved by different proteases, were produced. In cells transfected with these vectors, the genomic RNA present in the vectors is replicated, and cell fusogenic infection spreads to neighboring cells depending on the presence of other proteases; however, no viral particles are released. The vectors of this invention, encoding the F proteins which are cleaved by proteases whose activity is enhanced in cancer, show cancer growth suppressive effect in vivo.

The invention discloses a method for cultivating hepatitis E viruses in an in-vitro manner. The method has the advantages that miRNA-A6 [micro-RNA (ribonucleic acid)-A6] is transfected by cells for 24 h, then viruses are inoculated and can be massively replicated, and mass replication of offspring viruses of the HEV (hepatitis E viruses) can be promoted by the transfected miRNA-A6 as revealed by means of Real-Time qPCR (quantitative polymerase chain reaction) and Western Blot analysis; the method is major breakthrough in the aspect of HEV in-vitro cultivation, and excellent foundation is laid for further researching biological characteristics and immunological characteristics of the HEV, researching and developing HEV vaccine and screening anti-HEV medicines.

The invention is adapted to the field of computer technology and provides a multi-object copy method and device. The method comprises following steps: starting a multi-object copy function and generating a record chain table; acquiring at least one object to be copied selected by a user and address information of objects to be copied; storing address information of objects to be copied to the record chain table; and starting a paste function and pasting objects to be copied corresponding to address information to a target directory according to address information of the record chain table. The multi-object copy method and device have following beneficial effects: address information of objects to be copied can be temporarily recorded by the record chain table so that different folders and/or files in many different storage paths can be copied at one time; problems in a conventional copy and paste method such as a complicated operation process and low speed of different folders and/or files in many different storage paths are solved; and copy efficiency of multiple folders and/ or files is increased.

The invention relates to a data replication method and device and a virtualization system. The method comprises the steps that after a virtual resource manager receives a mirror image export request of user equipment, a source book of a virtual machine and a target memory address of a mirror image file of the virtual machine are determined according to identification of the virtual machine carried by the export request, replication requests are sent to at least two determined hosts respectively, and all the hosts replicate different data segments of the source book of the virtual machine in parallel to the target memory address. In this way, in the mirror image export process, the virtual resource manager can assign multiple hosts to complete a data replication operation in parallel, the replication efficiency of the mirror image file is improved, and the performance bottleneck brought by the single host executing data replication is avoided.

The present application discloses a method and system for replicating database tables, the method firstly obtains all the table data blocks matched with the source table, then copies all the table data blocks and stores them in the storage area of the target table, and finally updates the blocks and table directories of all the table data blocks according to the storage address and the target table name of the target table, thereby completing the replication of the database table. The system includes table data block acquisition module, replication module and update module. The invention realizes table data replication by means of data block replication, avoids the traditional migration process of first reading table records in the data block and then inserting the table records into the data block, can greatly improve the replication efficiency of the database table, and is advantageous in saving CPU resources because there is no table record reading and inserting operation.

The embodiment of the invention discloses a method and a device for copying an image file. The method comprises the following steps of when the image file of a production center is copied to a data backup center, obtaining the target position information of a copied data block of the current image file; when a write request on the image file is received, and the number corresponding to the starting position of the write request is greater than the number corresponding to the target position, directly executing the write request; when the number corresponding to the starting position of the write request is smaller than the number corresponding to the target position, executing the write request, and recording the write request into a pre-established write request log; when the copying of the image file of the production center to the data backup center is completed, transmitting the data of the write request log to the data backup center, and replaying, so as to form an effective image snapshot. The method disclosed by the embodiment has the advantages that the influence to the I/O (input/output) request operation of an upper layer is low in the image file copying process, the log copying operation is reduced by one half, and the copying efficiency of the image file is improved.

The invention discloses a breakpoint re-copying method for medium data. The method comprises the following steps: a system generates task information according to characteristics of the medium data and begins to transmit the medium data; when the transmission of the medium data is interrupted, the system records state information of a stopping point and adds the state information of the stopping point and the characteristics of the medium data to an unfinished task list; when the new medium data transmission task is started by the system, the systems compares the characteristics of the new medium data transmission task and the characteristics of the medium data in the unfinished task list; if a comparison result is that the characteristics of the new medium data transmission task are as same as the characteristics of the medium data in the unfinished task list, the system extracts the information of the unfinished task and then continues the transmission of the medium data according to the state information of the stopping point; and if the comparison result is that the characteristics of the new medium data transmission task are different from the characteristics of the medium data in the unfinished task list, the system adds the new medium data transmission task to the unfinished task list and then starts the new medium data transmission.