Storage
If there is a large amount of data to be stored, it is probably more
than can be stored on-line, so various off-line techniques need to be managed.
Video files in particular are very large, yet not all the files available are
likely to be needed at any one time. An hierarchical method of storage may be
needed, where less frequently requested items are stored on slower media, such
as CD-ROM juke box, or a tape library, and brought back onto the video server only
when required.
Information needs to be recorded which identifies where the digital
data for a particular item is physically located, so that it can be retrieved for
delivery when required.