Step 1. Create an Instance

Overview
This document describes how to create an instance and deploy a VPC in the CKafka console.
Prerequisites
You have signed up for a Tencent Cloud account.
You have created a VPC.
Directions
1. Log in to the CKafka console.
2. Select Instance List on the left sidebar, click Create to go to the instance purchase page, and enter the purchase information as needed.
Configuration Item
Parameter
Parameter Description
Basic Configuration
Product Form
Serverful: The classic form of CKafka. Users can purchase clusters of corresponding specifications based on requirements. As business volume changes, certain attention needs to be paid to the CKafka cluster.
Serverless: A brand-new form of CKafka. The goal is to completely release the user's effort and focus more on business logic. Currently in public beta.
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Billing Mode
Pro Edition instances support two modes: Monthly Subscription and Pay-As-You-Go. Advanced Edition Instances support Monthly Subscription mode.
Monthly Subscription: Payment is required in advance to use resources. It is mainly suitable for scenarios where the business is relatively stable and used for a long time.
Pay-As-You-Go: Use resources first and then pay. It is mainly suitable for short-term situations such as testing or when the peak traffic is uncertain.
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Cluster Type
The professional edition is primarily aimed at production environment customers on a large scale. The advanced edition is primarily aimed at test environment customers in small-scale scenarios. For specific differences, refer to Product Specifications. Here you can select Advanced Edition.
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Region
Select a region with resources close to those of the client deployment. For regions currently supported by CKafka, see Regions and Availability Zones.
Cluster Configuration
Name
If not filled in, the default is unnamed. When purchasing multiple instances, the system supports creating instance suffix numbers automatically in ascending order and the specify pattern string function. For specific operations, refer to Batch sequential naming or naming with specified pattern strings.
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Kafka version
Choose an appropriate Kafka version based on your business requirement. See Version selection suggestion for CKafka.
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Peak Bandwidth
Estimate the resource amount of peak bandwidth according to the rule of peak business traffic bandwidth × number of replicas. CKafka will accumulate the bandwidth consumption of all replicas to calculate the actual peak bandwidth.
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Disk
The currently supported disk types are SSD Cloud Block Storage and high-performance cloud block storage. For differences in cloud disk types, see Cloud Disk Type.
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Partition specification
The Partition limit for a CKafka instance is the cumulative total of number of partitions * number of replicas. The number of partitions included in the package (i.e., the minimum value) is free of charge. Additional partitions are billed in units of 100. Downgrading is not supported at this time.
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Message retention
Ranges from 24 to 2160 hours. The default message retention time is 72 hours. After exceeding the set retention duration, messages will be deleted to preserve sufficient disk space.
CKafka supports the automatic adjustment of disk utilization. After the disk utilization reaches the threshold, you can set the Dynamic Message Retention Policy to reduce message retention time or set the Automatic Disk Capacity Expansion to adjust disk space. For details, see Disk Water Level Processing.
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Cross-AZ Deployment
The professional edition supports deployment in a maximum of 4 different availability zones, and the advanced edition supports deployment in a maximum of 2 different availability zones. For how it works of cross-availability zone deployment, please refer to Cross-AZ Deployment.
Network Configuration
VPC Network
If users need to connect to other private networks, please refer to Add Routing Policy to modify the routing access rules. Select the network created in advance here.
Other configuration
Tag
Tags are used to manage resources by category from different dimensions. For method of use, see Tag Management. Leave blank here.
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Automatic Renewal
After checking, when the account balance is sufficient, instances and public network bandwidth will be auto-renewed monthly after expiration.
3. VPC: Select a suitable VPC based on your business needs.
If you want to use other VPCs, follow the steps in Adding Routing Policy to modify the routing rules.
4. Click Buy Now. The created instance will be displayed in the instance list in about 3–5 minutes.

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Configuration Item	Parameter	Parameter Description
Basic Configuration	Product Form	Serverful: The classic form of CKafka. Users can purchase clusters of corresponding specifications based on requirements. As business volume changes, certain attention needs to be paid to the CKafka cluster. Serverless: A brand-new form of CKafka. The goal is to completely release the user's effort and focus more on business logic. Currently in public beta.
		Billing Mode	Pro Edition instances support two modes: Monthly Subscription and Pay-As-You-Go. Advanced Edition Instances support Monthly Subscription mode. Monthly Subscription: Payment is required in advance to use resources. It is mainly suitable for scenarios where the business is relatively stable and used for a long time. Pay-As-You-Go: Use resources first and then pay. It is mainly suitable for short-term situations such as testing or when the peak traffic is uncertain.
		Cluster Type	The professional edition is primarily aimed at production environment customers on a large scale. The advanced edition is primarily aimed at test environment customers in small-scale scenarios. For specific differences, refer to Product Specifications. Here you can select Advanced Edition.
		Region	Select a region with resources close to those of the client deployment. For regions currently supported by CKafka, see Regions and Availability Zones.
Cluster Configuration	Name	If not filled in, the default is unnamed. When purchasing multiple instances, the system supports creating instance suffix numbers automatically in ascending order and the specify pattern string function. For specific operations, refer to Batch sequential naming or naming with specified pattern strings.
		Kafka version	Choose an appropriate Kafka version based on your business requirement. See Version selection suggestion for CKafka.
		Peak Bandwidth	Estimate the resource amount of peak bandwidth according to the rule of peak business traffic bandwidth × number of replicas. CKafka will accumulate the bandwidth consumption of all replicas to calculate the actual peak bandwidth.
		Disk	The currently supported disk types are SSD Cloud Block Storage and high-performance cloud block storage. For differences in cloud disk types, see Cloud Disk Type.
		Partition specification	The Partition limit for a CKafka instance is the cumulative total of *number of partitions number of replicas**. The number of partitions included in the package (i.e., the minimum value) is free of charge. Additional partitions are billed in units of 100. Downgrading is not supported at this time.
		Message retention	Ranges from 24 to 2160 hours. The default message retention time is 72 hours. After exceeding the set retention duration, messages will be deleted to preserve sufficient disk space. CKafka supports the automatic adjustment of disk utilization. After the disk utilization reaches the threshold, you can set the Dynamic Message Retention Policy to reduce message retention time or set the Automatic Disk Capacity Expansion to adjust disk space. For details, see Disk Water Level Processing.
		Cross-AZ Deployment	The professional edition supports deployment in a maximum of 4 different availability zones, and the advanced edition supports deployment in a maximum of 2 different availability zones. For how it works of cross-availability zone deployment, please refer to Cross-AZ Deployment.
Network Configuration	VPC Network	If users need to connect to other private networks, please refer to Add Routing Policy to modify the routing access rules. Select the network created in advance here.
Other configuration	Tag	Tags are used to manage resources by category from different dimensions. For method of use, see Tag Management. Leave blank here.
Other configuration		Automatic Renewal	After checking, when the account balance is sufficient, instances and public network bandwidth will be auto-renewed monthly after expiration.

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