period
The purchase duration of the asynchronous replication relationship. This parameter is required when 'ChargeType = PrePay. The duration unit is specified by'periodunit', and the value range is:
When 'PeriodUnit = Week', the value range of this parameter is 1, 2, 3, and 4.
When 'PeriodUnit = Month', the value range of this parameter is 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 24, 36, 48, 60.