- Release Notes and Announcements
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Instance Management
- Creating Instance
- Naming with Consecutive Numeric Suffixes or Designated Pattern String
- Viewing Instance
- Upgrading Instance
- Downgrading Instance Configuration
- Terminating/Returning Instances
- Change from Pay-as-You-Go to Monthly Subscription
- Upgrading Instance Version
- Adding Routing Policy
- Public Network Bandwidth Management
- Connecting to Prometheus
- AZ Migration
- Setting Maintenance Time
- Setting Message Size
- Topic Management
- Consumer Group
- Monitoring and Alarms
- Smart Ops
- Permission Management
- Tag Management
- Querying Message
- Event Center
- Migration to Cloud
- Data Compression
- Instance Management
- CKafka Connector
- Practical Tutorial
- Practical Tutorial of CKafka Client
- Connector Practical Tutorial
- Connecting Flink to CKafka
- Connecting Schema Registry to CKafka
- Connecting Spark Streaming to CKafka
- Connecting Flume to CKafka
- Connecting Kafka Connect to CKafka
- Connecting Storm to CKafka
- Connecting Logstash to CKafka
- Connecting Filebeat to CKafka
- Multi-AZ Deployment
- Log Access
- Replacing Supportive Route (Old)
- Practice Tutorial for Cluster Bandwidth in High CPU Utilization Scenarios
- Practice Tutorial for Cluster Capacity Planning
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- DataHub APIs
- ACL APIs
- Topic APIs
- DescribeTopicProduceConnection
- BatchModifyGroupOffsets
- BatchModifyTopicAttributes
- CreateConsumer
- CreateDatahubTopic
- CreatePartition
- CreateTopic
- CreateTopicIpWhiteList
- DeleteTopic
- DeleteTopicIpWhiteList
- DescribeDatahubTopic
- DescribeTopic
- DescribeTopicAttributes
- DescribeTopicDetail
- DescribeTopicSubscribeGroup
- FetchMessageByOffset
- FetchMessageListByOffset
- ModifyDatahubTopic
- ModifyTopicAttributes
- DescribeTopicSyncReplica
- Instance APIs
- Route APIs
- Other APIs
- Data Types
- Error Codes
- SDK Documentation
- General References
- Conducting Production and Consumption Pressure Testing on CKafka
- Configuration Guide for Common Parameters in CKafka
- Connecting to Legacy Self-Built Kafka
- Suggestions for CKafka Version Selection
- CKafka Data Reliability Description
- Connector
- FAQs
- Service Level Agreement
- Contact Us
- Glossary
- Release Notes and Announcements
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Instance Management
- Creating Instance
- Naming with Consecutive Numeric Suffixes or Designated Pattern String
- Viewing Instance
- Upgrading Instance
- Downgrading Instance Configuration
- Terminating/Returning Instances
- Change from Pay-as-You-Go to Monthly Subscription
- Upgrading Instance Version
- Adding Routing Policy
- Public Network Bandwidth Management
- Connecting to Prometheus
- AZ Migration
- Setting Maintenance Time
- Setting Message Size
- Topic Management
- Consumer Group
- Monitoring and Alarms
- Smart Ops
- Permission Management
- Tag Management
- Querying Message
- Event Center
- Migration to Cloud
- Data Compression
- Instance Management
- CKafka Connector
- Practical Tutorial
- Practical Tutorial of CKafka Client
- Connector Practical Tutorial
- Connecting Flink to CKafka
- Connecting Schema Registry to CKafka
- Connecting Spark Streaming to CKafka
- Connecting Flume to CKafka
- Connecting Kafka Connect to CKafka
- Connecting Storm to CKafka
- Connecting Logstash to CKafka
- Connecting Filebeat to CKafka
- Multi-AZ Deployment
- Log Access
- Replacing Supportive Route (Old)
- Practice Tutorial for Cluster Bandwidth in High CPU Utilization Scenarios
- Practice Tutorial for Cluster Capacity Planning
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- DataHub APIs
- ACL APIs
- Topic APIs
- DescribeTopicProduceConnection
- BatchModifyGroupOffsets
- BatchModifyTopicAttributes
- CreateConsumer
- CreateDatahubTopic
- CreatePartition
- CreateTopic
- CreateTopicIpWhiteList
- DeleteTopic
- DeleteTopicIpWhiteList
- DescribeDatahubTopic
- DescribeTopic
- DescribeTopicAttributes
- DescribeTopicDetail
- DescribeTopicSubscribeGroup
- FetchMessageByOffset
- FetchMessageListByOffset
- ModifyDatahubTopic
- ModifyTopicAttributes
- DescribeTopicSyncReplica
- Instance APIs
- Route APIs
- Other APIs
- Data Types
- Error Codes
- SDK Documentation
- General References
- Conducting Production and Consumption Pressure Testing on CKafka
- Configuration Guide for Common Parameters in CKafka
- Connecting to Legacy Self-Built Kafka
- Suggestions for CKafka Version Selection
- CKafka Data Reliability Description
- Connector
- FAQs
- Service Level Agreement
- Contact Us
- Glossary
Operation Scenarios
If there are too many redundant resources in your current instance specifications, you can consider degrade your Pro Edition instance specification via the console.
Note：
You can use the console to directly downgrade your instance specifications, including peak bandwidth, disk capacity, and the number of partitions. The downgrade operation is a smooth change and will not interrupt your services.
Standard Edition instance specifications cannot be downgraded.
Prerequisites
You need to check the following before the downgrade:
1. Check whether the instance has unavailable public network routes, supporting networks, VPC networks and so on. For more information, see Adding Routing Policy.
2. Check whether the instance has unsynced replicas. For further details, see Viewing Topic Details.
3. Check whether the instance has unfinished tasks (data migration), abnormally created topics, or abnormally deleted topic data.
4. Check the resource usage of the instance at least 7 days in the past.
Note：
If there are unfinished tasks, we recommend that you wait for all the tasks to be completed before the downgrade. If task execution is abnormal, submit a ticket for assistance.
Directions
1. Log in to the CKafka console.
2. On the instance list page, select More > Downgrade in the Operation column to enter the upgrade page.
3. On the instance downgrade page, select the target specification for the downgrade.
Note：
If the peak bandwidth in the last 7 days or the peak storage in the last 7 days is greater than the target specification, downgrade is not advised.
4. Click Submit and complete the downgrade as prompted.
Features Unavailable During Downgrade
During cluster reconfiguration, it is recommended not to operate on Topic management-related features, such as adding new Topics or editing Topic attributes. The following is a list of related features:
Feature Module | Specific Feature | Description |
Topic management list | Create a Topic | Create a Topic within the cluster. |
| Edit a Topic | Edit Topic attributes within the cluster, such as changing the number of partitions or replicas. |
| Delete a Topic | Delete a Topic within the cluster. |
| Traffic throttling | Configure traffic throttling policies for the Topic. |
| Manual partition traffic balancing | Manually rebalance partition traffic to address issues of uneven partition distribution. |
Intelligent Ops (exclusive feature of Professional Edition) | Disk watermark management | Modify the dynamic message retention policy or enable automatic disk scale-out, with an on/off toggle. |
| Dynamic partition management | Manually rebalance partition traffic, or configure automated partition balancing policies. |
| Elastic bandwidth configuration | Change the status of elastic bandwidth. |
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