If you use the pay-as-you-go storage billing method, you do not need to configure the maximum storage space. The storage space is dynamically scaled based on the amount of stored data. You are charged based on the actual storage usage. Fees are deducted from your account on an hourly basis.
Scenarios
Your Alibaba Cloud account has a small amount of data stored in the clusters in specific regions, and the amount of data generated by your business is prone to frequent fluctuations.
Purchase pay-as-you-go clusters
For information about how to select the pay-as-you-go billing method for storage when you purchase a cluster, see Purchase a pay-as-you-go cluster and Purchase a subscription cluster.