scan-edf

1 definition found

scan-edf - Free On-line Dictionary of Computing (26 May 2007) :

  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)