PolarDB provides storage plans to reduce the storage costs of your cluster.

Storage plans

The storage capacity of PolarDB is automatically scaled in or out based on the amount of stored data. You do not need to manually specify the storage capacity. You are charged for only the used storage. We recommend that you purchase PolarDB storage plans if you want to store a large volume of data. This reduces the storage costs.

  • Purchase storage plans

    For more information, see Purchase a storage plan.

    • You can select the following types of storage plans: storage plans that apply to regions inside mainland China, and storage plans that apply to China (Hong Kong) and regions outside China. You can purchase only one storage plan for each type.
    • A storage plan can be shared by multiple clusters. A storage plan can be used by all the clusters in the regions that are specified by the Plan Type parameter. You can specify mainland China or China (Hong Kong) and regions outside China as the value of the parameter.
    • If the capacity of your storage plan is insufficient, you can upgrade the storage plan. However, storage plans cannot be downgraded.
    • You are charged for the extra storage that is not covered by the storage plan on a pay-as-you-go basis.

      Assume that you have three PolarDB clusters and each cluster requires 400 GB of storage. If you purchase a storage plan of 1,000 GB and these clusters share the storage plan, you are charged for the extra 200 GB of storage based on the pay-as-you-go billing method. For more information, see View the database storage usage.

  • Apply storage plans
    PolarDB allows you to purchase compute nodes by using the following two billing methods: pay-as-you-go and subscription. The pricing varies based on different billing methods. For more information about how to apply storage plans to compute nodes that use these two billing methods, see the following topics:
  • Manage storage plans