Master transaction sync policy:
          
            SYNC (the transaction will be written and synchronized to the disk; highest durability)
            WRITE_NO_SYNC (the transaction will be written only; the synchronization will be performed later)
            NO_SYNC (write later; the transaction will be written and synchronized later; lowest durability)
          
       
      
          Replica transaction sync policy:
          
              SYNC (the transaction will be written and synchronized to the disk; highest durability)
              WRITE_NO_SYNC (the transaction will be written only; the synchronization will be performed later)
              NO_SYNC (write later; the transaction will be written and synchronized later; lowest durability)