Data structure #chaincode


Can you explain to me how to port data to the blockchain.  I have a large set of data ( like medical data) that needs to go onto the ledger.  I need to know if formatting this data in a JSON format a good decision.  And exactly how do I streamline this data to the chaincode.  And what configurations needs to be made to accommodate this data being processed on the blockchain, (i.e. ordering peer).