s6 : message digest of added rows in MCDT are inserted to MCMDT and set the f value to 1
join DSMDT or MCMDT with the condition that the f value of DSMDT or MCMDT is 1, and select only the changed rows
D1 : only rows in MC are modified/delete
D2 : only rows in DS are modified/delete
s7 : Replace the row in DS with the row in MC / Delete the row from DS
s8 : Replace the row in MC with the row in DS / Delete the row from MC
s9 : -Delete corresponding rows from two MDT
Replace the rows in DS with the rows in MC
Delete the row from DS
Insert the row in MC to DS
-Bothh rows are modified/delete
-Apply the synchronization policy
s10 :