Storage Stamps – A storage stamp is a cluster of N racks of
storage nodes, where each rack is built out as a separate fault
domain with redundant networking and power. Clusters typically
range from 10 to 20 racks with 18 disk-heavy storage nodes per
rack. Our first generation storage stamps hold approximately 2PB
of raw storage each. Our next generation stamps hold up to 30PB
of raw storage each.