Topic Partition

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最終更新日: 2026-05-11 18:01:12

A topic partition is the smallest read/write unit of CLS. A log topic can contain multiple partitions, the number of which determines the maximum data read/write capabilities of a single log topic. The data read/write capabilities of a single topic partition are as follows:
Category
Description
Frequency control
A single topic partition supports a maximum of 200 QPS of read operations. It will return the status code 429 with an error message of "SpeedQuotaExceed" when this limit is exceeded.
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A single topic partition supports a maximum of 500 QPS of write operations. It will return the status code 429 with an error message of "SpeedQuotaExceed" when this limit is exceeded.
Note: 
Here, 500 QPS does not equate to 500 log entries per second. A single protobuf package from one request may include multiple log entries for batch upload.
Traffic throttling
There is no limit on the read traffic of a single topic partition. However, it is recommended that the traffic be maintained within 5 MB/s.
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The write traffic limit on a single topic partition after data compression is 5 MB/s. If the limit is exceeded, the system returns status code 429 with the error SpeedQuotaExceed.
If a log topic has 10 partitions, its maximum supported write throughput for compressed logs is 5MB/s * 10 = 50MB/s. By default, a single log topic can have a maximum of 50 partitions, corresponding to a maximum write throughput for compressed logs of 5MB/s * 50 = 250MB/s. If 50 partitions do not meet your business requirements, you can contact us to request an exception for a larger number of partitions.
Note: 
In practice, it is recommended to enable the Auto Split feature when you create a topic. CLS will automatically increase the number of topic partitions based on actual data volume, eliminating the need for manual partition management.

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Cloud Log Service

Topic Partition

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Category	Description
Frequency control	A single topic partition supports a maximum of 200 QPS of read operations. It will return the status code 429 with an error message of "SpeedQuotaExceed" when this limit is exceeded.
Frequency control		A single topic partition supports a maximum of 500 QPS of write operations. It will return the status code 429 with an error message of "SpeedQuotaExceed" when this limit is exceeded. Note: Here, 500 QPS does not equate to 500 log entries per second. A single protobuf package from one request may include multiple log entries for batch upload.
Traffic throttling	There is no limit on the read traffic of a single topic partition. However, it is recommended that the traffic be maintained within 5 MB/s.
Traffic throttling		The write traffic limit on a single topic partition after data compression is 5 MB/s. If the limit is exceeded, the system returns status code 429 with the error SpeedQuotaExceed.