College Time Table System in PHP

For real time and high availability cluster, key characteristics are datas computing must be finished before the deadline in every computing period and systems never fail in a long life term. First, an real time and high availability cluster platform based on task distributing table is described in the paper, then measures from aspects of process scheme and message transferring are introduced to guarantee computing time of the real time cluster, finally dependability measures are represented from aspects of redundant nodes and task migrating.