how to save the costs of data transfer over the Internet by using data transfer plans and EIP bandwidth plans.

Data transfer plan

A data transfer plan supports the billing of data transfer over the Internet on a subscription basis. The plan offers a price lower than that of the pay-as-you-go billing method and provides off-peak data plans. This reduces the costs of data transfer over the Internet. Each data transfer plan applies to Elastic Cloud Service (ECS) instances, elastic IP addresses (EIPs), and Server Load Balancer (SLB) instances that are billed by data transfer.

Data transfer plans are easy to use. After you activate a data transfer plan, fees are automatically deducted from your resource plan. You can view the usage of data transfer plan on the Billing Management page.

The following section describes the benefits of data transfer plans:

  • Minimizes the costs of data transfers

    Data transfer plans reduces the prices of data transfers at off-peak hours. The China (Hong Kong) region is used as an example. The costs of data transfers are compared among the scenarios when the pay-as-you-go billing method, full-time data transfer plan, and off-peak data transfer plan are used.

    Assume that your cloud resources consume a total of 5 TB traffic in the China (Hong Kong) region. The costs of the preceding scenarios are compared in the following table.

    Billing solution of 5 TB of data transferred in the China (Hong Kong) region Unit price (CNY/GB) Total price (CNY) Reduced cost (CNY) Reduce cost by
    Pay-as-you-go billing method 1 5120 0 0
    Full-time data transfer plan 0.75 3727 1393 27.2%
    off-peak data transfer plan 0.51 2609 2511 49%
  • Supports multiple scenarios

    All ECS instances, EIPs, and SLB instances that are billed by data transfer support data transfer plans. Data transfer plans allow you to minimize the costs when a large amount of data is transferred.

  • Easy to use

    • Each plan has a validity period. After a plan expires, the remaining data usage quota is unavailable. We recommend that you choose a plan the provides the necessary data usage quota based on the data usage history of your workloads. You can first purchase a plan with the lowest required data usage quota. You can raise the quota in the future to support your business requirements.

    • After the resources of the data transfer plan are exhausted, the system applies the pay-as-you-go billing method. This ensures continuous service of your workloads.

    • If you have purchased multiple data transfer plans, data allowance in the plan that expires first is used in priority.

EIP bandwidth plan

EIP Bandwidth Plan is an independent bandwidth service. It provides high-quality multi-line BGP bandwidth and supports multiple billing methods. This allows these EIPs to share the bandwidth that is supported by the EIP bandwidth plan You can associate the EIPs with ECS instances, NAT gateways, or SLB instances in a VPC. Therefore, these services can share the bandwidth of EIP bandwidth plan.

EIP Bandwidth Plan supports multiple metering methods, such as pay-by-bandwidth. The EIP bandwidth plans with different metering methods allow you to minimize the bandwidth costs and optimize auto scaling of your workloads.

Note By default, each EIP bandwidth plan is provided without a public IP address. You can add EIPs to an EIP bandwidth plan.

You can use an EIP bandwidth plan to share the bandwidth that is included in the plan. This allows you to minimize the bandwidth costs. This applies if traffic spikes may occur. For example, you have deployed 10 ECS instances in the China (Hong Kong) region. EIPs are associated with these ECS instances. You can use the pay-by-bandwidth metering method for the resources and set the maximum bandwidth to 100 Mbit/s. For these 10 EIPs with the peak bandwidth of 100 Mbit/s, you must pay CNY 3,253 per day.

However, traffic analysis of the 10 EIPs shows that the bandwidth for each of the ECS instances fluctuates at different points in time. The peak outbound bandwidth of the 10 ECS instances is about 500 Mbit/s, as shown in the following figure.

In this case, you can use EIP Bandwidth Plan. You can purchase an EIP bandwidth plan that supports the maximum bandwidth of 500 Mbit/s. These ECS instances can share the bandwidth. In this way, each ECS instance can use a peak bandwidth five times that of the 100 Mbit/s EIP, and you pay only CNY 1,680 per day for the 500 Mbit/s EIP bandwidth plan. Therefore, the daily bandwidth cost is reduced by 50%. This amounts to CNY 1,573.

Therefore, if your workloads have multiple EIPs and experience obvious bandwidth fluctuations, an EIP bandwidth plan can help you save costs.

Note We recommend that you analyze the traffic model of your service and select an appropriate billing method:

If your workloads process stable network traffic, you can choose the subscription billing method. This can help you save 20% to 30% costs compared with the pay-as-you-go billing method.