You can calculate the spending commitment based on the data transfer volume of your Enterprise Edition transit routers, then purchase a savings plan to reduce data transfer costs.
Calculate the spending commitment
Transit router savings plans are ideal for stable traffic with flat peak traffic and long-term usage. Observe the traffic trends of your Enterprise Edition transit routers, determine a suitable traffic tier, and then calculate the spending commitment.
The unit prices and discounts in the following examples are for reference only. The pricing and discount information on the buy page shall prevail.
For easier calculation, numbers are rounded up or down to two decimal places. The results on the buy page shall prevail.
For example, a company deployed an Enterprise Edition transit router in each of the China (Hangzhou), China (Shenzhen), and China (Zhangjiakou) regions, all forwarding network traffic. The following figure shows the traffic trends of the transit routers over 7 days. Assume that the commitment term is 1 hour. The following figure shows the total data transfer of all transit routers within a commitment term. 
The traffic trends show that the transit routers forward at least 250 GB of data during each commitment term. The company can use a savings plan to offset the fee for at least 250 GB of data transfer per commitment term. Assume that the company chooses 100% upfront payment when purchasing the savings plan.
The minimum spending commitment for each commitment term is calculated as follows: 250 GB × USD 0.02/GB × 0.612 = USD 3.06. Since the spending commitment must be an integer, this value is rounded to USD 3.
USD 3/0.612/USD 0.02 per GB = 245.10 GB. The savings plan can offset the fee for 245.10 GB of data transfer during each commitment term.
NoteIf the calculation result is not an integer, round it up or down to the nearest integer.
In this example, if the spending commitment is rounded up to USD 4, then: USD 4/0.612/USD 0.02 per GB = 326.80 GB. The savings plan can offset the fee of 326.80 GB of data transfer during each commitment term. The preceding figure shows that the amount of data transfer during each commitment term is less than 270 GB. The fee of 270 GB of data transfer is closer to USD 3 than USD 4. Fewer resources are wasted if USD 3.06 is rounded down to USD 3.
The company saves at least 245.10 GB × USD 0.02/GB - USD 3 = USD 1.90 each commitment term.
Assume that a total of 44,239 GB of data is forwarded within 7 days. Using this volume to project the annual data transfer, the total data process fee over 365 days can be reduced by 36.07%.
The savings plan helps the company save at least USD 1.90 × 24 hours/day × 365 days = USD 16,644 per year.
Without a savings plan, the company's annual data process fee would be44,239 GB × USD 0.02/GB × (365 days ÷ 7) = USD 46,134.96.
The projected annual savings percentage for data process fees is USD 16,644 ÷ USD 46,134.96 = 36.07%.
Purchase a savings plan
Log on to the CEN console.
In the left-side navigation pane, click Savings Plans.
On the Savings Plans page, click Buy Now.
On the Savings Plan for Transit Router page, configure the following parameters and click Buy Now to complete the payment.
Parameter
Description
Savings Plan Type
Default value: General-purpose.
Committed Consumption Amount
Enter a spending commitment.
Minimum value: USD 1. Only integers are supported.
Installment Payment
Select a type of upfront payment. Valid values:
0% Upfront: You do not need to pay when you purchase the Savings Plan for Transit Router. You are billed at the end of each commitment term until the savings plan expires.
100% Upfront: You pay the full amount for the Savings Plan for Transit Router at the time of purchase. The plan then covers a portion of your data process fees during each commitment term until it expires.
Duration
Default value: 1 Year.
Committed Consumption Cycle
Default value: By Hour.
Effective Time
Select when you want the savings plan to take effect.
Immediately Take Effect
The savings plan takes effect at the start of the next commitment term. For example, if you make the purchase at 13:45 on June 29, 2023 and select Immediately Take Effect, the savings plan takes effect at 14:00 on June 29, 2023.
Take Effect at a Specified Time (By Hour)
View the fees offset by a savings plan
On the Savings Plans overview page, you can view the usage and coverage of your purchased savings plans. The page provides the View Details, Usage, and Coverage tabs.
To export the data on any of the three tabs, perform the following steps:
In the upper-right corner of the table, click the
icon.On the Export Record page, wait until the Download button appears in the Actions column, then click Download to export an Excel file to your computer.
The View Details tab shows bill-level offset details. The following table describes the columns on this tab.
Column | Description |
Savings Plan Owner Account | The account that owns the savings plan. |
Savings Plan Instance ID | The ID of the savings plan. |
Start and End Time of Deducted Bill | The start time and end time of the bill that is offset by the savings plan. |
Savings Plan Name | The name of the savings plan. |
Savings Plan Type | The type of the savings plan. |
Billing Item | The billable item to which the offset applies. |
Deduct Fee | The amount offset by the savings plan. |
Official Price of Deducted Part | The list price of the portion that is offset by the savings plan. |
Billing Cycle | The billing cycle of the offset bill. |
Catalogue Gross Amount of Deducted Bills | The list total price for the bill that is offset. |
Deduction Rate for Bills | The percentage of the bill amount that is offset by the savings plan. |
Deducted Resource Owner Account | The account that owns the resource whose fee is offset. |
Deducted Commodity | The product whose fee is offset. |
Deducted Instance ID | The instance ID of the resource whose fee is offset. |
Instance Family of Deducted Instance | The instance family of the instance whose fee is offset. |
Specifications of Deducted Instance | The specification of the instance whose fee is offset. |
Region of Deducted Instance | The region of the instance whose fee is offset. |
Deductible Discount | The discount applied when the savings plan offsets the bill. |
The Usage tab shows how much of each savings plan is used during each statistical period. The following table describes the columns on this tab.
Column | Description |
User Name | The account that owns the savings plan. |
Resource Instance ID | The ID of the savings plan. |
Start/End Time | The time range over which usage data is collected. |
Status | The current status of the savings plan. |
Type | The type of the savings plan. |
Region | The region of the cloud resource whose fee is offset. |
Spec Family | The instance family of the cloud resource whose fee is offset. |
Spn Deduct | The amount offset by the savings plan during the statistical period. |
Spn Cost | The total amount available in the savings plan during the statistical period. |
Post Paid Cost | The standard pay-as-you-go fee before the savings plan is applied. |
Savings | The cumulative amount saved by using the savings plan. |
Usage Percentage | The percentage of the savings plan amount that is used. |
The Coverage tab shows how much of your pay-as-you-go spending is covered by savings plans. The following table describes the columns on this tab.
Column | Description |
Account Name | The account associated with the covered spending. |
Owner Account Name | The owner account of the pay-as-you-go instance. |
Pay-as-you-go Instance ID | The ID of the pay-as-you-go instance. |
Start/End Time | The time range over which coverage data is collected. |
Product Detail | The product details of the covered spending. |
Region | The region of the pay-as-you-go instance. |
Instance Type | The specification of the pay-as-you-go instance. |
Coverage | The percentage of pay-as-you-go spending that is covered by savings plans. |
Spn Deduct Amount | The amount offset by savings plans. |
Total Paid | The total spending for the pay-as-you-go resource during the statistical period. |
Pay-as-you-go Price | The standard pay-as-you-go fee before savings plans are applied. |