cell smart restore from backup等待事件

This is an Exadata wait event that occurs when doing a restore via RMAN. Exadata automatically offloads RMAN restore activities to the storage cells. Solutions Offloading the RMAN restore activity to the storage cells within an Exadata machine is probably a good thing, so there may no tuning required. If RMAN restores are affecting performance, scheduling them at different times may be appropriate.