A system that will restart the running program after a system failure. Snapshots of data and programs are stored at periodic intervals and the system rolls back to restart at the last recorded snapshot.

• 在系统失效后，能够重新启动运行程序的一种系统。数据和程序按周期性间隔抽点存储起来，系统返回上一个抽点处重新运行。