Update Time:
  Successfully exchanging to-from litecoin/ethereum/bitcoin.

Question : For Ethereum how to generate several addresses in single account for every client transaction identification ? Or any other methods ?
Have solutions but I am developing solutions to handle at-least a million transactions/day from very beginning on reasonable resources.
Search gives nothing except but everyone asking my problem. anyone on forum here have some solution guide me
Learned lot about inner-working of bitcoins/clones/altcoins pros and cons.