Is NoSQL really necessary or do we just need a better SQL?

Mul9  node  cluster   However,  if  one  moves  from  a  single  node  setup  to  a  mul?  node   cluster,  then  some  of  these  problems  get  incredibly  hard  to  solve.   One  needs   •  distributes  locks   •  distributed  dead-­‐lock  detec?on   •  2-­‐phase  commits   •  and  to  make  life  even  harder,  some  mechanisms  to  handle   failures  of  nodes   Using  MVCC  instead  of  locks  is  also  possible,  but  mvcc  itself  does   not  distribute  well  and  has  latency  problems.