Edge Node Service (ENS) charges you for Edge Load Balancer (ELB) instances on a monthly pay-as-you-go basis. The fee depends on the instance type and how long the instance runs within the billing cycle.
Instance types and pricing
Each ELB instance type defines a set of performance metrics: maximum connections, new connections per second (CPS), and queries per second (QPS). These metrics vary by instance type. For more information, see Instance types and pricing.
The following table lists the unit price for each instance type.
|
Type |
Unit price (USD/month) |
|
Small I (elb.s1.small) |
7.5 |
|
Medium I (elb.s2.small) |
26 |
|
Medium II (elb.s2.medium) |
52 |
|
Large I (elb.s3.small) |
104 |
|
Large II (elb.s3.medium) |
166 |
Billing rules
|
Item |
Description |
|
Billing method |
Pay-as-you-go |
|
Billing cycle |
Monthly |
Your monthly bill is the sum of fees for all ELB instances used during that month. The fee for each instance is calculated as follows:
Fee = Unit price x Effective factor
Effective days
Effective days refers to the number of days from the day when an ELB instance is created to the day when it is released, or to the end of the month if the instance is not released within that month.
| Scenario | Created | Released | Effective days |
|---|---|---|---|
| Instance released within the month | June 5, 2024 | June 25, 2024 | 21 |
| Instance used till the end of the month | June 5, 2024 | Not released | 26 |
Effective factor
Effective factor = Effective days / Total number of days in the current month.
For example, if a bill for June 2024 covers 26 effective days, the effective factor is 26/30 = 0.86666667.
Billing example
Scenario: A user creates a Medium I (elb.s2.small) ELB instance on June 5, 2024. The instance remains in use through the end of June 2024, resulting in 26 effective days.
Calculation:
-
Effective factor: 26/30 = 0.86666667.
-
Unit price: USD 26/month for Medium I (elb.s2.small) instances.
-
Fee for the instance in June: 26 x 0.86666667 = USD 22.53.
Additional fees
If you associate an elastic IP address (EIP) with an ELB instance, you are charged separately for Internet traffic through the EIP. For more information, see Billing for EIPs.