Scan-EDF
<storage, algorithm> A variation of the Scan disk aceess algorithm for
use in a real-time environment where, in general, requests are served according
to Earliest Deadline First. If two requests share the same deadline, they may be
reorganised according to Scan.
A typical example is a video server that retrieves video data from a hard disk.
The playback of a video impose tight real-time constraints but if the server
retrieves data once every second for each video channel, Scan-EDF can be
applied, reducing the seek overhead.
(1995-11-15)
Nearby terms:
scan « scan design « SCANDISK « Scan-EDF »
scanf » Scan-In, Scan-Out » scan line
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