| 摘要 |
When a predetermined amount of data is written in a file of a magnetic disk, a data pack creating section creates a data pack. A plurality of transmission threads allocates the data pack, and transmits it to a plurality of receiving threads via a connection. The received data pack is written in a magnetic disk. The transmission threads register a data pack, a transmission starting flag and a file position of the data pack in a transmission control table included in a transmission control section. The transmission threads are operated independently from each other, and when finishing a transmission of the allocated data pack, first, investigate a retry queue, and then, transmit a data pack if the data pack exists in the retry queue, and request a data pack from the data pack creating section so as to transmit the data pack if no data pack exists, in the retry queue. Therefore, according to the present invention, it is possible to provide a data transmission apparatus which can transmit a high quality file at a high speed.
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