Method and device for data file transmission

Abstract

The embodiment of the invention provides a method and a device for data file transmission and relates to the technical field of communication. The method comprises the following steps: a receiving end creates at least two downloading threads and starts all the downloading threads to carry out concurrent downloading, and each of the downloading threads independently downloads block data in a corresponding task queue from the receiving end and writes the downloaded block data into a buffer queue; the receiving end simultaneously starts a parallel single thread, and the parallel single thread sequentially acquires block data which is numbered i in the buffer queue and carries out orderly-iterative data integrity verification on the block data which is numbered i to obtain a data integrity verification value after orderly combination of the block data which is numbered i and all the previous block data; and the receiving end writes the block data which is numbered i into a target file. According to the embodiment of the invention, the transmission speed for a single large data file is improved, the reliable transmission time for a single large data file is shortened, and the network bandwidth utilization rate is improved.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a data file transmission method and device. Background technique [0002] At present, the implementation process of transferring big data files in the Internet environment is as follows: [0003] The sender performs as follows: [0004] Step 1) Divide the large file into several data packets; [0005] Step 2) Assign an identifier to the large file and each data packet; [0006] Step 3) Judge whether all the data packets have been sent, if they have not been sent, go to step 4); if they are sent, end the sending; [0007] Step 4) Send data to the receiver in units of data packets; [0008] Step 5) If the result returned by the receiver is correct, go to step 3), otherwise go to step 4). [0009] The receiver performs as follows: [0010] Step 1') After correctly receiving the data sent by the sender, return the correct reception to the sender, otherwise an error will be return...

AI Technical Summary

Problems solved by technology

[0012] However, when using the above method to transmit a single large data file, on the one hand, because the single-thread transmission method is mainly used, the transmission speed of a single large data file is relatively slow

On the other hand, the integrity verification of a single large data file is usually performed after the download of the large data file is completed. Therefore, it takes a long time for a single large data file to be reliably transmitted, and the resource overhead is large, and thus Causes low utilization of network bandwidth

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