Billable items and billing rules of subscription instances - ApsaraMQ for Kafka

The subscription billing method is a billing method that requires you to pay before you use resources. This billing method is suitable for scenarios with stable business traffic. Before you use the subscription billing method, you must estimate the amount of resources that are required for your business. You can subscribe to the required resources for a period ranging from one month to multiple years. You must pay the subscription fees in a one-off manner. After you place an order and complete the payment, the system allocates resources to your account. If you do not renew a resource after the resource expires, the resource is reclaimed by the system.

Billable items

The following table describes the billable items of ApsaraMQ for Kafka instances that are billed based on the subscription billing method.

Billable item	Description
Internet traffic	Internet traffic is divided into read traffic and write traffic. The maximum read traffic and the maximum write traffic that are supported by ApsaraMQ for Kafka are the same. When you purchase an ApsaraMQ for Kafka instance, compare the peak values of read and write traffic to determine the higher value. Then, select a traffic specification based on the higher value. You are charged for this billable item only if you use Internet- and virtual private cloud (VPC)-connected instances.
Traffic specification	Traffic specification refers to the computing and processing capabilities of a cluster in ApsaraMQ for Kafka. The capabilities are measured by the amount of traffic that is consumed by elastic network interfaces (ENIs). The ENI traffic is calculated based on the following formula: ENI traffic = Business traffic + Replication traffic in the cluster. Business traffic is the actual messaging traffic that is generated in business scenarios. Replication traffic in the cluster refers to the amount of traffic that is generated when the data in your ApsaraMQ for Kafka cluster is backed up. By default, the cluster has three replicas after a backup is performed. Business traffic is divided into read traffic and write traffic. The ratio of the maximum read traffic to the maximum write traffic is 1:1 for Professional Edition (High Write) instances and Standard Edition (High Write) instances, and 5:1 for Professional Edition (High Read) instances. When you purchase an instance, compare the peak values of read and write traffic to determine the higher value. Then, select a traffic specification based on the higher value. To ensure business stability, we recommend that you purchase a quota that is approximately 130% of your peak read or write traffic. The excess traffic is used for buffering.
Disk capacity	The minimum disk capacity varies based on the traffic specification. This helps ensure high performance and cost-effective storage. ApsaraMQ for Kafka supports ultra disks and SSDs. We recommend that you use SSDs. The price of a disk varies based on the disk type. Exercise caution when you select a disk type. The disk type cannot be changed after the order is placed. By default, data is stored in three replicas. For a Standard Edition instance, if you purchase a disk that has a space of 300 GB, the actual storage space that you can use to store your business data is 100 GB. The remaining 200 GB is used to store backups. The disk cost of a Professional Edition instance that stores data in three replicas is approximately 60% lower than the disk cost of a self-managed Apache Kafka instance. If you purchase a disk that has a space of 300 GB, the actual storage space that you can use to store your business data is 300 GB. An additional 600 GB of storage space is provided for you free of charge to store backups. Important Free storage space is available only for topics that use cloud storage as the storage engine. For information about cloud storage, see Comparison between storage engines.
Partition	The number of free partitions in an instance varies based on the traffic specification. The number of available topics is closely related to the total number of partitions. For example, if you purchase an instance that contains 50 partitions based on the alikafka.hw.2xlarge traffic specification that provides 1,000 free partitions, the total number of partitions in the instance is 1,050. The total number of partitions is calculated by using the following formula: Total number of partitions = Number of purchased partitions + Number of free partitions. The number of available topics equals the total number of partitions. Therefore, the number of available topics is also 1,050. The number of available groups is 2,100. The number of available groups is calculated based on the following formula: Number of available groups = Total number of partitions × 2. Note ApsaraMQ for Kafka no longer allows you to purchase instances based on topic specifications. If you purchased your existing instance based on the topic specification, the topic specification is converted into the partition specification. The number of partitions after conversion is based on the number of topics that you purchased.

Note

You are charged for the billable items that you use.
You can change the value of the Maximum Message Retention parameter to save disk space. The system deletes messages when the disk usage reaches the predetermined threshold or the message retention period reaches the specified value of the Maximum Message Retention parameter. The Maximum Message Retention parameter specifies the maximum period for which messages can be retained when disk capacity is sufficient. When disk usage reaches 85%, disk capacity is considered insufficient. In this case, the system deletes the earliest stored messages to ensure service availability. By default, messages are retained for a maximum of 72 hours. You can also select a period that ranges from 24 hours to 480 hours. For more information, see When are historical messages deleted from ApsaraMQ for Kafka?
The number of API calls is not a billable item.

Formulas

If you use the subscription billing method for an ApsaraMQ for Kafka instance, you are charged for the billable items, such as the traffic specification and disk capacity, that you select when you create the instance. Billable items and their unit prices vary based on the instance type. For more information, see Billable items.

Internet- and VPC-connected instances: Instances of this type can be accessed over the Internet or from virtual private clouds (VPCs).
Total fees = (Unit price of Internet traffic + Price of the traffic specification + Unit price of the disk capacity × Purchased disk capacity/100 + Price of a single partition × Number of purchased partitions) × Number of months
Note
The unit prices of Internet traffic are approximately the same as the unit prices of Elastic IP Address (EIP) traffic. If you purchase an Internet- and VPC-connected instance by topic, the fees are calculated by using the following formula: Total fees = (Unit price of Internet traffic + Price of the traffic specification + Unit price of the disk capacity × Purchased disk capacity/100 + Price of a single topic × Number of additional topics) × Number of months.
VPC-connected instances: Instances of this type can be accessed only from VPCs.
Total fees = (Price of the traffic specification + Unit price of the disk capacity × Purchased disk capacity/100 + Price of a single partition × Number of purchased partitions) × Number of months
Note
If you purchase an Internet- and VPC-connected instance by topic, the fees are calculated by using the following formula: Total fees = (Price of the traffic specification + Unit price of the disk capacity × Purchased disk capacity/100 + Price of a single topic × Number of additional topics) × Number of months.

Billing description

Note

The prices and regions that are described in the following table are only for reference. The actual prices on the buy page shall prevail.

Internet traffic

Internet traffic is billed based on bandwidth. The unit prices of Internet traffic vary based on the region. The calculation results are rounded to the nearest decimal with three decimal places.

Table 3. Billing of Internet traffic
Region	Unit price of bandwidth (USD per month)
Region	1 Mbit/s	2 Mbit/s	3 Mbit/s	4 Mbit/s	5 Mbit/s	6 Mbit/s and higher (n indicates the bandwidth value)
China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), China (Chengdu), Indonesia (Jakarta), India (Mumbai), Philippines (Manila), and Thailand (Bangkok)	3.6	7.2	11.1	15	19.6	19.6 + (n - 5) × 12.5
China (Qingdao)	3.3	6.5	10	13.5	17.6	17.6 + (n - 5) × 11.3
Singapore, Germany (Frankfurt), Malaysia (Kuala Lumpur), US (Silicon Valley), US (Virginia), and UK (London)	3.6	7.2	10.8	14.4	18	18 + (n - 5) × 12.5
China (Hong Kong) and Australia (Sydney)	4.7	9.4	14.1	18.8	23.5	23.5 + (n - 5) × 15.7
Japan (Tokyo) and South Korea (Seoul)	4	7.9	11.8	15.7	19.6	19.6 + (n - 5) × 13.2

Billing of traffic specifications

The billing rules of traffic specifications vary based on the instance edition. Standard Edition (High Write), Professional Edition (High Write), and Professional Edition (High Read) instances support different traffic specifications. The maximum traffic and the number of partitions in a cluster vary based on the traffic specification. The prices of traffic specifications vary based on the region group to which your region belongs. For information about region groups, see Region groups

For information about traffic specifications supported by each instance edition, see Instance editions.

Note

For information about traffic specifications supported by instances that are purchased based on the topic, see What are the number of free topics and partitions in the traffic specification of an instance that is purchased based on topic specifications?

For information about the billing rules of traffic specifications supported by Standard Edition (High Write) instances, see Billing of traffic specifications of Standard Edition (High Write) instances.
For information about the billing rules of traffic specifications supported by Professional Edition (High Write) instances, see Billing of traffic specifications of Professional Edition (High Write) instances.
For information about the billing rules of traffic specifications of Professional Edition (High Read) instances, see Billing of traffic specifications of Professional Edition (High Read) instances.

Table 6. Billing of traffic specifications of Standard Edition (High Write) instances
Traffic specification	Maximum read traffic of endpoint elastic network interfaces (ENIs) (MB/s)	Maximum write traffic of ENIs (MB/s)	Number of free partitions	Unit price in region group 1 (USD per month)	Unit price in region group 2 (USD per month)	Unit price in region group 3 (USD per month)
alikafka.hw.2xlarge	3 × 20	3 × 20	1,000	250	370	340
alikafka.hw.3xlarge	3 × 30	3 × 30	1,000	360	530	480
alikafka.hw.6xlarge	3 × 60	3 × 60	1,000	520	760	700
alikafka.hw.9xlarge	3 × 90	3 × 90	1,000	660	960	880
alikafka.hw.12xlarge	3 × 120	3 × 120	1,000	800	1,160	1,070

Table 9. Billing of traffic specifications of Professional Edition (High Write) instances
Traffic specification	Maximum read traffic of ENIs (MB/s)	Maximum write traffic of ENIs (MB/s)	Number of free partitions	Unit price in region group 1 (USD per month)	Unit price in region group 2 (USD per month)	Unit price in region group 3 (USD per month)
alikafka.hw.2xlarge	3 × 20	3 × 20	1,000	600	870	800
alikafka.hw.3xlarge	3 × 30	3 × 30	1,000	780	1,040	1,040
alikafka.hw.6xlarge	3 × 60	3 × 60	1,000	1,130	1,510	1,510
alikafka.hw.9xlarge	3 × 90	3 × 90	1,000	1,440	1,920	1,920
alikafka.hw.12xlarge	3 × 120	3 × 120	1,000	1,750	2,330	2,330
alikafka.hw.16xlarge	3 × 160	3 × 160	2,000	2,060	2,740	2,740
alikafka.hw.20xlarge	3 × 200	3 × 200	2,000	2,980	3,970	3,970
alikafka.hw.25xlarge	3 × 250	3 × 250	2,000	3,430	4,570	4,570
alikafka.hw.30xlarge	3 × 300	3 × 300	2,000	3,880	5,170	5,170
alikafka.hw.60xlarge	3 × 600	3 × 600	2,000	5,280	7,030	7,030
alikafka.hw.80xlarge	3 × 800	3 × 800	2,000	6,220	8,280	8,280
alikafka.hw.100xlarge	3 × 1,000	3 × 1,000	3,000	7,270	9,670	9,670
alikafka.hw.120xlarge	3 × 1,200	3 × 1,200	3,000	8,100	10,780	10,780
alikafka.hw.150xlarge	3 × 1,500	3 × 1,500	3,000	9,500	12,640	12,640
alikafka.hw.180xlarge	3 × 1,800	3 × 1,800	3,000	10,910	14,520	14,520
alikafka.hw.200xlarge	3 × 2,000	3 × 2,000	3,000	12,070	16,060	16,060

Table 12. Billing of traffic specifications of Professional Edition (High Read) instances
Traffic specification	Maximum read traffic of ENIs (MB/s)	Maximum write traffic of ENIs (MB/s)	Number of free partitions	Unit price in region group 1 (USD per month)	Unit price in region group 2 (USD per month)	Unit price in region group 3 (USD per month)
alikafka.hr.2xlarge	50 + 2 × 10	10 + 2 × 10	1,000	600	870	800
alikafka.hr.3xlarge	75 + 2 × 15	15 + 2 × 15	1,000	780	1,040	1,040
alikafka.hr.6xlarge	150 + 2 × 30	30 + 2 × 30	1,000	1,130	1,510	1,510
alikafka.hr.9xlarge	180 + 2 × 45	45 + 2 × 45	1,000	1,440	1,920	1,920
alikafka.hr.12xlarge	240 + 2 × 60	60 + 2 × 60	1,000	1,750	2,330	2,330
alikafka.hr.16xlarge	240 + 2 × 80	80 + 2 × 80	2,000	2,060	2,740	2,740
alikafka.hr.20xlarge	300 + 2 × 100	100 + 2 × 100	2,000	2,980	3,970	3,970
alikafka.hr.25xlarge	375 + 2 × 125	125 + 2 × 125	2,000	3,430	4,570	4,570
alikafka.hr.30xlarge	450 + 2 × 150	150 + 2 × 150	2,000	3,880	5,170	5,170
alikafka.hr.60xlarge	900 + 2 × 300	300 + 2 × 300	2,000	5,280	7,030	7,030
alikafka.hr.80xlarge	1,200 + 2 × 400	400 + 2 × 400	2,000	6,220	8,280	8,280
alikafka.hr.100xlarge	1,500 + 2 × 500	500 + 2 × 500	3,000	7,270	9,670	9,670
alikafka.hr.120xlarge	1,800 + 2 × 600	600 + 2 × 600	3,000	8,100	10,780	10,780
alikafka.hr.150xlarge	2,250 + 2 × 750	750 + 2 × 750	3,000	9,500	12,640	12,640
alikafka.hr.180xlarge	2,700 + 2 × 900	900 + 2 × 900	3,000	10,910	14,520	14,520
alikafka.hr.200xlarge	3,000 + 2 × 1,000	1,000 + 2 × 1,000	3,000	12,070	16,060	16,060

Billing of disk capacity
The billing rules of disk capacity vary based on the disk type. The unit prices of disk capacity vary based on the region group to which your region belongs. If the disk capacity provided free of charge in the traffic specification does not meet your business requirements, you can purchase additional disk capacity by increasing the value of the Disk Capacity parameter on the buy page.
Disk type
Disk capacity (GB)
Unit price in region group 1 (USD per month)
Unit price in region group 2 (USD per month)
Unit price in region group 3 (USD per month)
Ultra disk
100
6
8
8
SSD
100
16
23
21
Note
- The disk cost of a Professional Edition instance that stores data in three replicas is approximately 60% lower than the disk cost of a self-managed open source instance.
- A minimum number of disks are required to prevent issues such as rollback failures caused by frequent deletion of messages. If you want to reduce the minimum number of disks, submit a ticket.

Billing of partitions

If the number of partitions that are provided free of charge in the traffic specification does not meet your business requirements, you can purchase additional partitions by increasing the value of the Partitions parameter on the buy page. The price of each additional partition varies based on the region group.

Billable item	Unit price in region group 1 (USD per partition-month)	Unit price in region group 2 (USD per partition-month)	Unit price in region group 3 (USD per partition-month)
Number of partitions	0.32	0.46	0.42

Billing of additional topics (suitable only for instances that are purchased by topic)
If the number of topics that are provided free of charge in the traffic specification does not meet your business requirements, you must purchase more topics by increasing the value of the Topics parameter on the topic creation page. This option is available only to instances that are purchased by topic. Each time you purchase an additional topic, the quota for partitions is increased by 16. If the number of topics in your instance reaches the upper limit that is allowed by the current traffic specification, we recommend that you select a higher traffic specification because a higher traffic specification corresponds to more topics. This helps reduce your costs. The price of each additional topic varies based on the region group.
Billable item
Unit price in region group 1 (USD per topic-month)
Unit price in region group 2 (USD per topic-month)
Unit price in region group 3 (USD per topic-month)
Topic
7
11
10
Note
The default number of topics indicates the minimum number of topics that are supported by an instance. The system allocates resources to the instance based on the minimum number of topics even if you specify a smaller number of topics. In this case, your costs are not reduced.

Region groups

Table 20. Region groups
Region group	Region
Region group 1	China (Hangzhou)
	China (Shanghai)
	China (Qingdao)
	China (Beijing)
	China (Zhangjiakou)
	China (Hohhot)
	China (Ulanqab)
	China (Shenzhen)
	China (Heyuan)
	China (Guangzhou)
	China (Chengdu)
Region group 2	China (Hong Kong)
	Singapore
	Japan (Tokyo)
	South Korea (Seoul)
	US (Virginia)
	US (Silicon Valley)
	Germany (Frankfurt)
	UK (London)
	Australia (Sydney)
Region group 3	Malaysia (Kuala Lumpur)
	India (Mumbai)
	Indonesia (Jakarta)
	Philippines (Manila)
	Thailand (Bangkok)

References

If you have questions about your bill, you can view the billing details. For more information, see View billing details
For information about how to renew an instance before the instance expires, see Instance renewal.
For information about how to apply for a refund after you purchase an instance, see Refund.
For information about frequently asked questions (FAQ) related to billing, see Billing FAQ.

Disk type	Disk capacity (GB)	Unit price in region group 1 (USD per month)	Unit price in region group 2 (USD per month)	Unit price in region group 3 (USD per month)
Ultra disk	100	6	8	8
SSD	100	16	23	21