Forced reinsertion When over flow occurs, do not split immediately Choose p entries to be re-inserted   Empirically, = 30% Which entries? For each entry, compute distance of its centroid to centroid of node   Remove from closest to farthest (close reinsert)   Reinsertion will not increase volume of node   Remove from farthest to closest (far reinsert)   Likely to be reinserted at some other node   Not clear which one better   Experimentally, close reinsert better Done only once at each level to avoid infinite loop