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    ApsaraDB RDS:Cannot select an RDS read-only instance for a DTS subscription

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    ApsaraDB RDS:Cannot select an RDS read-only instance for a DTS subscription

    Last Updated:Oct 22, 2025

    This topic explains why you cannot select an RDS read-only instance for a Data Transmission Service (DTS) subscription.

    Cause

    DTS subscriptions require access to the binary logs of a database instance. Reading binary logs from read-only instances is prohibited. Therefore, you cannot select an RDS read-only instance for a DTS subscription.