Abstract: The invention provides a side frame, which comprises a frame body formed by connecting vertical columns and a horizontal bar; and a plurality of supporting arms provided on the frame body; the vertical columns are provided with a plurality of mounting holes, two ends of each of the supporting arms are respectively connected with mounting holes of two of the vertical columns of the frame body; one end of the horizontal bar of the frame body is provided with a fixing device for installing the frame body to a wall body. The present invention also provides a storage rack with side frames. The storage rack comprises at least two side frames and a plurality of boards, each of which is positioned between two side frames, and can be detachably connected to the supporting arms on the side frames. The side frames of the present invention have simple structure and strong practicability.

Abstract: Embodiments of the present invention disclose a bit rate reduction processing method for a data file performed at a server, to reduce a download delay of a user. The server receives an upload application request sent by a first client; the server queries for an instant-transmission index according to the upload application request, the instant-transmission index being used to record association information of fileids of a plurality of original data files and fileids of corresponding bit rate reduction data files; the server sends a first instant-transmission hit instruction to a first client if the instant-transmission index is hit, the first instant-transmission hit instruction including a second fileid; the server receives a first download application request sent by a second client; and the server obtains a first bit rate reduction data file according to the second fileid, and sends the first bit rate reduction data file to the second client.

Abstract: This invention provides a supporting arm for a storage rack, comprising a body; a supporting portion for installing a board; and a first tab and a second tab for engaging a frame body structure; the body is provided with a vacant portion for the second tab to be engaged with the frame body structure; the supporting portion is connected to the body; the first tab is provided at one end of the body, the second tab is disposed near the other end of the body and facing the vacant portion, so that the supporting portion for installing the board is fixed on the frame body structure through the first tab and the second tab. The supporting arm for a storage rack of the invention has a simple structure and strong practicability. Not only can the supporting arm form a stable connection with a frame body structure, it also provides the storage rack better support effect, thereby improving the structural strength of the storage rack.