Method and device for downloading file

A device for downloading a file, comprising:

• a processor;
• a memory storing a plurality of instructions, the plurality of instructions being executed by the processor and causing the processor to:
• acquire attribute information about a file from a name node of at least two data nodes when receiving a download request of the file;
• learn information about the length of the file according to the attribute information about the file;
• download the file directly when the length of the file is less than or equal to a preset value;
• and
• when the length of the file goes beyond the preset value,
• segment the download request into at least two fragments of download requests, the at least two fragments of download requests comprising a first fragment download request and a second fragment download request;
• send the at least two fragments of download requests to the at least two data nodes to request to download corresponding fragments,
• receive information returned by each data node;
• and
• identify whether the information is a downloaded fragment or download failure information,
• wherein, when the downloaded information corresponding to the first fragment download request that is received from one data node is identified as the download failure information,
• exclude the data node from the at least two data nodes;
• and
• when the downloaded information corresponding to the second fragment download request is also identified as the download failure information, send the second fragment download request to another data node of the at least two data nodes;
• wherein, when the downloaded information corresponding to the first fragment download request that is received from one data node is identified as the downloaded fragment and the downloaded information corresponding to the second fragment download request is identified as the download failure information,
• send the second fragment download request to the data node;
• and
• wherein, when downloaded fragments corresponding to fragments of download requests are received from data nodes,
• obtain the file according to the at least two fragments obtained by download.

A non-transitory computer readable storage medium, storing one or more programs for execution by one or more processors of a computer having a display, the one or more programs comprising instructions for performing:

• when receiving a download request of a file,
• acquiring, by the computer, attribute information about the file from a name node of at least two data nodes,
• learning information, by the computer, about the length of the file awarding to the attribute information about the file, and
• when the length of the file goes beyond a preset value,
• segmenting, by the computer, the download request into at least two fragments of download requests, the at least two fragments of download requests comprising a first fragment download request and a second fragment download request,
• sending the at least two fragments of download requests from the computer to the at least two data nodes to request to download corresponding fragments,
• receiving, by the computer, information returned by each data node, and
• identifying, by the computer, whether the information is a downloaded fragment or download failure information,
• wherein, when the downloaded information corresponding to the first fragment download request that is received from one data node is identified as the download failure information,
• excluding, by the computer, the data node from the at least two data nodes;
• and
• when the downloaded information corresponding to the second fragment download request is also identified as the download failure information, sending, by the computer, the second fragment download request to another data node of the at least two data nodes;
• wherein, when the downloaded information corresponding to the first fragment download request that is received from one data node is identified as the downloaded fragment and the downloaded information corresponding to the second fragment download request is identified as the download failure information,
• sending, by the computer, the second fragment download request to the data node;
• and
• wherein, when downloaded fragment fragments corresponding to fragments of download requests are received from data nodes,
• obtaining, by the computer, the file according to the at least two fragments obtained by download.