A storage plan is a subscription-based resource plan for PolarDB. You can use storage plans to offset storage fees and fees for level-1 backups that exceed the free quota. Storage plans can help you save on storage resources and level-1 backups. The larger the volume of the storage plan (capacity and duration), the more costs you save. For example, a monthly storage plan provides 10%-45% savings when compared with a comparable pay-as-you-go cluster. The longer the duration of the plan, the more savings you get. If you purchase annual storage plans, you can save an additional 15% off the monthly price. This topic describes the billing rules of storage plans and how to purchase a storage plan.
Fees that can be offset by storage plans
You are eligible for storage plans when you use the following resources:
- Cluster storage
The storage of each PolarDB cluster is charged based on the volume and storage duration of data. If you require a large storage capacity, such as 1,000 GB or more, we recommend that you use storage plans to reduce costs. Storage fees are offset at a ratio of 1:1. This means that a 1-GB storage plan can be used to offset the fees of 1 GB storage for level-1 backups.
- Level-1 backups that exceed the free quota
Storage plans are applied to all PolarDB clusters that belong to your account. The remaining capacity of a storage plan is automatically used to offset the level-1 backup storage space that exceeds the free quota at a ratio of 1:1.6. In this case, every 1 GB of the storage plan is used to offset 1.6 GB of level-1 backup storage. If the remaining capacity of the storage plan is insufficient to offset the level-1 backup storage space, you are charged for additional storage space on a pay-as-you-go basis.
Storage plans provide cost savings over regular pay-as-you-go plans. The larger the volume of the storage plan (capacity and duration), the more costs you save.
For more information, see Storage plans.
Prices of storage plans and discounts
This section describes the price comparison of different deductible capacity under the two purchase schemes of unused storage plans and monthly storage plans.
| Capacity (GB) | Mainland China | China (Hong Kong) and regions outside China | ||
|---|---|---|---|---|
| Without storage plans (USD/month) | With storage plans (USD/month) | Without storage plans (USD/month) | With storage plans (USD/month) | |
| 100 | 56 | 55
(approximately 1.7% off) |
62 | 61
(approximately 1.6% off) |
| 200 | 112 | 109
(approximately 2.7% off) |
124 | 121
(approximately 2.4% off) |
| 300 | 168 | 163
(approximately 3.0% off) |
186 | 182
(approximately 2.2% off) |
| 500 | 280 | 271
(approximately 3.2% off) |
310 | 302
(approximately 2.6% off) |
| 1,000 | 560 | 490
(approximately 12.5% off) |
620 | 550
(approximately 11.3% off) |
| 2,000 | 1,120 | 980
(approximately 12.5% off) |
1,240 | 1,090
(approximately 12.1% off) |
| 3,000 | 1,680 | 1,210
(approximately 28.0% off) |
1,860 | 1,340
(approximately 28.0% off) |
| 5,000 | 2,800 | 2,020
(approximately 28.0% off) |
3,100 | 2,230
(approximately 28.1% off) |
| 10,000 | 5,600 | 3,260
(approximately 41.8% off) |
6,200 | 3,630
(approximately 41.5% off) |
| 20,000 | 11,200 | 6,510
(approximately 41.9% off) |
12,400 | 7,250
(approximately 41.5% off) |
| 30,000 | 16,800 | 9,760
(approximately 42.0% off) |
18,600 | 10,870
(approximately 41.5% off) |
| 50,000 | 28,000 | 14,860
(approximately 47.0% off) |
31,000 | 16,550
(approximately 46.6% off) |
| 100,000 | 56,000 | 29,720
(approximately 47.0% off) |
62,000 | 33,110
(approximately 46.6% off) |
Precautions
- Storage plans can be used by all PolarDB clusters in the regions that are specified by the Plan Type parameter. You can select Mainland China or Outside Mainland China.
- If the capacity of your storage plan is insufficient, you can purchase an additional storage plan or upgrade the storage plan. However, storage plans cannot be downgraded.
- If the amount of used storage exceeds the capacity of your storage plan, you are charged
for the additional storage resources based on the pay-as-you-go billing method.
For example, assume that you have created three PolarDB clusters that each requires 400 GB of storage. If you purchase a storage plan of 1,000 GB and these clusters share the storage plan, the storage resources used in excess of 200 GB are billed on a pay-as-you-go basis. For more information, see View the database storage usage.
Procedure
- Set Product Type to Storage Plan and specify the following parameters.
Parameter Description Plan Type - Mainland China: The storage plan can be used by all PolarDB clusters that are deployed in regions of mainland China, such as China (Hangzhou), China (Shanghai), and China (Beijing).
- Outside Mainland China: The storage plan can be used by all PolarDB clusters that are deployed in China (Hong Kong) and regions outside China, such as UK (London) and Singapore (Singapore).
Size The storage capacity of the storage plan. Purchase Plan The validity period of the storage plan. Note If you purchase a storage plan for one year or more, you can save an additional 15% off the monthly price.