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Cloud Load Balancer
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    LCU Fees

    Last updated: 2024-01-04 09:44:16
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      A Loadbalancer Capacity Unit (LCU) measures the performance metrics when CLB processes traffic. This document describes how the LCU charge is calculated.

      Pay-as-You-Go

      Note:
      Only LCU-supported CLB instances will incur LCU usage fees.
      Specification
      Concurrent Connections per Minute
      New Connections per Second (CPS)
      Queries per Second (QPS)
      Max Bandwidth
      Standard
      100,000
      10,000
      10,000
      2Gbps
      Advanced 1
      200,000
      20,000
      20,000
      4Gbps
      Advanced 2
      500,000
      50,000
      30,000
      6Gbps
      Super Large 1
      1,000,000
      100,000
      50,000
      10Gbps
      Super Large 2
      2,000,000
      200,000
      100,000
      20Gbps
      Super Large 3
      5,000,000
      500,000
      200,000
      40Gbps
      Super Large 4
      10,000,000
      1,000,000
      300,000
      60Gbps

      LCU metrics

      In the pay-as-you-go mode, LCU usage is measured by using the following four metrics: CPS, concurrent connections per minute, processed traffic, and rule evaluations. Rule evaluations are supported only for HTTP and HTTPS protocols. The performance of a single LCU is related to the protocol type of the listener.
      In pay-as-you-go mode, the billing cycle of LCUs is one hour. The number of LCUs consumed in one hour is calculated based on the aforementioned metrics, and fees are charged based on the maximum number of LCUs consumed by the aforementioned metrics. The LCU fees for a single CLB instance is the sum of the LCU costs of the listeners for different protocols.
      LCU fees per hour = MAX[Number of LCUs for concurrent connections, Number of LCUs for new connections, Number of LCUs for processed traffic, Number of LCUs for rule evaluations] × LCU unit price

      Pricing​

      Region
      LCU Unit Price (USD/Hour)
      LCU Unit Price for New Purchases (USD/Hour)
      All regions
      0.0072
      0.0059
      Note:
      Starting from 00:00:00, June 1, 2023 (UTC+8):
      For new purchases of CLB pay-as-you-go instances, the LCU unit price is adjusted to 0.0059 USD/hour.
      For existing CLB instances, the LCU fees and other billable items are not affected.
      This price adjustment is always valid unless otherwise declared.

      Billing examples

      Example 1: HTTP/HTTPS
      Example 2: TCP/UDP
      Assume that your LCU-supported CLB instance receives an average of 100 new connections per second, each lasting 3 minutes, that a client sends an average of 400 queries per second and CLB processes a total of 1,000 KB of query and response data per second, and that you have configured an HTTP listener on port 80 and an HTTPS listener on port 443, with 20 forwarding rules to route your client queries. You are charged on the following metrics:
      Metric Name
      Use Case
      LCU Coefficient
      LCUs Quantity Calculation
      New connections (per second)
      In this example, your CLB instance receives 100 new connections per second.
      25
      Number of LCUs = 100 ÷ LCU Coefficient = 4
      Concurrent connections (per minute)
      In this example, your CLB instance receives 100 new connections per second, which means 6,000 new connections per minute. As each connection lasts 3 minutes, the maximum concurrent connections per minute = 6,000 × 3 = 18,000.
      3,000
      Number of LCUs = 18,000 ÷ LCU Coefficient = 6
      Processed traffic (per hour)
      In this example, your CLB instance processes 1,000 KB of data per second. This translates to 3.6 GB per hour.
      1
      Number of LCUs = 3.6 ÷ LCU Coefficient = 3.6
      Rule evaluations (per second)
      In this example, your CLB instance receives 400 queries per second on average. Therefore, 20 forwarding rules result in 4,000 rule evaluations per second for each query: (20 forwarding rules – 10 free rules) × 400.
      1,000
      Number of LCUs = 4,000 ÷ LCU Coefficient = 4
      In this example, the maximum number of LCUs is consumed by the concurrent connections metric, which consumes 6 LCUs. Therefore, hourly fees of LCUs = 0.0072 USD/LCU × 6 LCUs = 0.0432 USD, and monthly fees = 0.0432 USD/h × 24 hours × 30 days = 31.104 USD.
      Assume that your CLB instance receives 100 new TCP connections (each transferring 1,000 processed bytes and each lasting 3 minutes) and 100 UDP flows (each transferring 1,000 processed bytes and each lasting 2 minutes). Your LCU fees will be calculated as follows: TCP traffic
      Metric Name
      Use Cases
      LCU Coefficient
      LCUs Quantity Calculation
      New connections (per second)
      In this example, your CLB instance uses 100 new connections per second.
      800
      Number of LCUs = 100 ÷ LCU Coefficient = 0.125
      Concurrent connections (per minute)
      In this example, your CLB instance receives 100 new TCP connections per second, each lasting 3 minutes. Therefore, the maximum number of concurrent connections per minute = 6,000 × 3 = 18,000.
      100,000
      Number of LCUs = 18,000 ÷ LCU Coefficient = 0.18
      Processed traffic (per hour)
      In this example, your CLB instance transfers 1,000 processed bytes for each TCP client connection. Therefore, the amount of traffic processed per hour = 100 connections/s × 60s × 60 min × 1,000 bytes = 0.36 GB.
      1
      Number of LCUs = 0.36 ÷ LCU Coefficient = 0.36
      UDP traffic
      Metric Name
      Use Case
      LCU Coefficient
      LCUs Quantity Calculation
      New connections (per second)
      In this example, your CLB instance uses 100 new UDP connections per second.
      400
      Number of LCUs = 100 ÷ LCU Coefficient = 0.125
      Concurrent connections (per minute)
      In this example, your CLB instance receives 100 new TCP connections per second, each lasting 2 minutes. Therefore, the maximum number of concurrent connections per minute = 100 × 60 × 2 = 12,000.
      50,000
      Number of LCUs = 12,000 ÷ LCU Coefficient = 0.24
      Processed traffic (per hour)
      In this example, your CLB instance transfers 1,000 processed bytes for each UDP client connection. Therefore, the amount of traffic processed per hour = 100 connections/s × 60s × 60 min × 1,000 bytes = 0.36 GB.
      1
      Number of LCUs = 0.36 ÷ LCU Coefficient = 0.36
      The hourly fee for each protocol is calculated based on the maximum number of LCUs used by these metrics.
      In the example of TCP traffic, the maximum number of LCUs is consumed by the processed traffic metric, which consumes 0.36 LCUs. Therefore, the hourly LCU fee for TCP = 0.0072 USD/LCU × 0.36 LCU = 0.002592 USD, and the monthly fee = 0.002592 USD/h × 24 hours × 30 days = 1.86624 USD.
      In the example of UDP traffic, the maximum number of LCUs is consumed by the processed traffic metric, which consumes 0.36 LCU. Therefore, the hourly LCU fee for UDP = 0.0072 USD/LCU × 0.36 LCUs = 0.002592 USD, and the monthly fee = 0.002592 USD/h × 24 hours × 30 days = 1.86624 USD.
      Then, the total hourly LCU fee of your LCU-supported CLB instance is 0.005184 USD/hour (with 0.002592 USD for TCP traffic and 0.002592 USD for UDP traffic). The estimated total monthly LCU fee on average is 3.73248 USD/month (with 1.86624 USD for TCP traffic and 1.86624 USD for UDP traffic)

      References

      Billing Overview
      Purchase Methods
      Upgrading CLB Instance
      
      
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