Data Reserve (DSM-042-15) (rus)¶
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The Data Reserve module solves two tasks: providing uninterrupted broadcasting in the case of LAN breakdown, and the physical delivery of audio material to the exact place where it should be played. The idea of this module is to perform background copying of all the audio elements used in a schedule to the local hard disk of the ON-AIR workstation. During playback the system checks if a copy of next audio element exists on a local HD. If it exists, then it is used instead of the remote audio element. If the original audio element is changed somehow, then the copy will be updated automatically. Audio elements that are used as a reserve are stored for 2 days, which helps to eliminate the frequent copying of the same files. Thus, when the system is set up carefully, the broadcast never happens from a network, as the network is being used only for preliminary copying of files.
Besides audio elements, the ON-AIR schedule itself is also being copied. So, in the case of a network breakdown, the ON-AIR station has both the schedule and data on its local hard drive to provide at least one day of broadcasting. After the re-establishment of the network communication, the system will automatically synchronize schedules.
The usage of lower-bit-rate channels like slow Internet between the ON-AIR workstation and the production / planning workstation is possible due to a Data Reserve module that can transfer all the needed data to the local hard disk in advance. In special cases, it is possible to organize broadcasting with a connection channel that does not provide real time throughput of material. Assume that the material volume is not so high, like when we need to transfer just 10 minutes of commercials per hour, and that the communication channel provides a transfer rate of a half the playback rate (64 Kbit/s). To transfer 10 minutes of audio, you will need 20 minutes of real time. But, if the schedule is prepared beforehand (one day in advance), all the necessary files will be transferred safely to the ON-AIR workstation before the moment of actual delivery ON-AIR.
Instead of using data reserve technology for distribution of content to working places of network radio station it is advised to use Distributed Media Data Base and DDB agent (DSA-0900-15) software.
