This document introduces the billing modes, billable items, and other information about TDMQ for RocketMQ (virtual clusters).
Billing Modes
TDMQ for RocketMQ virtual clusters use the pay-as-you-go (postpaid) billing mode. Pay-as-you-go is a billing mode that charges based on the actual usage of purchased resource specifications. It is primarily suitable for testing or scenarios with uncertain traffic peaks. You can pay after using resources, with fees settled hourly on the hour.
Billable Items
TDMQ for RocketMQ virtual clusters are sold in the form of clusters. The formula for the pay-as-you-go billing mode is as follows:
Total fees = API call fee + Topic resource usage fee = (Number of API calls for message sending + Number of API calls for message consumption) x API call unit price + Number of topics x Number of days x Topic unit price
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API call fee | The number of API calls is calculated in two dimensions: message type and message size. Message type: TDMQ for RocketMQ supports four message types: normal messages, scheduled and delayed messages, transactional messages, and ordered messages. The last three message types are all advanced feature messages. Normal messages: One API call is counted each time a normal message is sent or consumed. No matter whether the message is sent or consumed successfully, the API call will be charged as long as it is initiated. Advanced feature messages: Five API calls are counted each time an advanced feature message is sent or consumed. For example, if two transactional messages are sent once and one transactional message is consumed for a topic, the number of API calls is calculated as follows: 2 x 5 + 1 x 5 = 15. Message size: The maximum size of a single message is 4 MB, and the message size is measured in units of 4 KB. If a message is less than 4 KB in size, it will be counted as 4 KB. For example, if a message request is 18 KB in size, the number of API calls is calculated as follows: ⌈18/4⌉ = 5. ⌈ ⌉ means rounding up to the nearest integer. |
Topic resource usage fee | The billing unit price of topics changes in steps according to the number of API calls generated for each topic on the day. The resource usage fee is charged once a day for each topic. The daily topic resource usage fee is the sum of the fees generated for all topics on the day. No matter whether message sending and receiving occur for a topic on the day, a fee will be incurred. |
Pricing
Free Tiers
Each root account has a free tier of 20 million API calls per month.
Note:
This free tier is temporarily provided during the promotional period for new products. Before official charging starts, notifications will be sent through announcements, Short Message Service (SMS), the Message center, and emails.
API Call Prices
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| Chinese Mainland | Outside the Chinese Mainland | Financial Zone |
Tier 1 | 0~10 | 0.26 | 0.33 | 0.41 |
Tier 2 | 10~50 | 0.21 | 0.13 | 0.29 |
Tier 3 | 50~500 | 0.17 | 0.23 | 0.29 |
Tier 4 | More than 500 | 0.14 | 0.19 | 0.23 |
Note:
The number of API calls in the above tiers are accumulated based on the Tencent Cloud account (UIN) dimension and monthly billing cycle.
Billing Examples
Assume that your instance is located in the Guangzhou region, with the daily message sending and receiving as follows:
A total of 50 million normal messages are produced, the number of message consumption times is 70 million (including retries for failed message deliveries), and the size of each message is 20 KB.
A total of 30 million transactional messages are produced, the number of message consumption times is 30 million, and the size of each message is 4 KB.
A total of 10 million delayed messages are produced, the number of message consumption times is 10 million, and the size of each message is 2 KB.
Then, the number of API calls generated in a day is calculated as follows: (50 million + 70 million) x ⌈20/4⌉ + (30 million + 30 million) x 5 x ⌈4/4⌉ + (10 million + 10 million) x 5 x ⌈2/4⌉ = 1 billion calls.
If 1 billion API calls are generated every day in September, the API call fee incurred is calculated as follows:
The number of API calls on September 1 was 1 billion, and the cumulative number of API calls in the month was 1 billion. This falls within the range of tier 1, and the unit price is USD 0.26. Therefore, the API call fee is charged as follows: 10 x 0.26 x 100 = USD 260 (100 means 1 billion = 1 million x 100, billed per million calls).
The number of API calls was 1 billion on September 2, and the cumulative number of API calls in the month was 2 billion. This falls within the range of tier 2, and the unit price is USD 0.21. Therefore, the API call fee is charged as follows: 10 x 0.21 x 100 = USD 210 (100 means 1 billion = 1 million x 100, billed per million calls).
The number of API calls was 1 billion on September 3, and the cumulative number of API calls in the month was 3 billion. This falls within the range of tier 2, and the unit price is USD 0.21. Therefore, the API call fee is charged as follows: 10 x 0.21 x 100 = USD 210 (100 means 1 billion = 1 million x 100, billed per million calls).
The API call fee on September 4 and the remaining days of the month is calculated in a similar method.
On October 1, the number of API calls will start counting from zero.
Topic Resource Usage Fee
The billing unit price of topics varies based on the tiered pricing of the number of API calls generated for each topic on the day. The daily topic resource usage fee is the sum of all fees incurred for topics on the day. Topics created for less than one day are billed as one day.
Note:
The billing cycle starts at 00:00. Therefore, if you delete topic resources on the same day, the resource usage fee for that day will still be charged and reflected on the bill on the next day. No further charges will be incurred thereafter.
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| Chinese Mainland | Outside the Chinese Mainland | Financial Zone |
Tier 1 | 0~100 | 0.26 | 0.33 | 0.41 |
Tier 2 | 100~1000 | 0.13 | 0.17 | 0.21 |
Tier 3 | More than 1,000 | 0 | 0 | 0 |
Billing Examples
Assume that your instance is located in the Guangzhou region, and you have created 3 topics.
A total of 200,000 API calls are generated for topic 1 on the day, falling within the range of tier 1. Therefore, the resource usage fee for the day is USD 0.26.
A total of 2 million API calls are generated for topic 2 on the day, falling within the range of tier 2. Therefore, the resource usage fee for the day is USD 0.13.
A total of 500,000 API calls are generated for topic 3 on the day, falling within the range of tier 1. Therefore, the resource usage fee for the day is USD 0.26.
Therefore, the total resource usage fee for topics on the day is calculated as follows: 0.26 + 0.13 + 0.26 = USD 0.65.