A multi tenant database may be split between two or more databases while {HEAD ~ the database} being split continues processing {TAIL ~ requests} 
A multi tenant database may be split between two or more databases while { HEAD ~ the database } being split continues processing { TAIL ~ requests }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL