i have hesitation about choose environment for distributed component ? 

which use case use for distributed component in server ?

Example : I have one app : bank core ,

which has 4 module : Loan , Accounting , Deposit , Cash

when i have use distributed component - Loan ,accounting , deposit, cash on separated machine over all in one clustering ?

      Option 1 : All in one cluster------------ when use / use case ?

      Option 2 : distributed mode------------ when use / use case ?

please help me ?