Log Read/Write Constraints

This section describes the constraints on LTS log read/write.

**Table 1** Log read/write constraints
Category	Item	Description	Remarks
HUAWEI ID	Log write traffic	Logs are written at a rate up to 500 MB/s for a HUAWEI ID.	To increase the upper limit, create a service ticket.
	Log writes	Logs are written up to 10,000 times per second for a HUAWEI ID.	To increase the upper limit, create a service ticket.
	Log query traffic	Up to 10 MB of logs are returned in a single API query for a HUAWEI ID.	To increase the upper limit, create a service ticket.
	Log reads	Logs are read up to 1,000 times per minute for a HUAWEI ID.	To increase the upper limit, create a service ticket.
Log group	Log write traffic	Logs are written at a rate up to 200 MB/s in a log group.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
	Log writes	Logs are written up to 1,000 times per second in a log group.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
	Log query traffic	Up to 10 MB of logs are returned in a single API query for a log group.	N/A
	Log reads	Logs are read up to 500 times per minute in a log group.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
Log stream	Log write traffic	Logs are written at a rate up to 100 MB/s in a log stream.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
	Log writes	Logs are written up to 500 times per second in a log stream.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
	Log query traffic	Up to 10 MB of logs are returned in a single API query for a log stream.	N/A
	Log reads	Logs are read up to 100 times per minute in a log stream.	Not mandatory. Service quality cannot be ensured if this limit is exceeded.
	Log time	Logs in a period of 24 hours can be collected. Logs generated 24 hours before or after the current time cannot be collected. For example: If the current time is 11:00 on January 7, 2022, logs generated before 11:00 on January 6 cannot be collected. If the current time is 11:00 on January 7, 2022, logs generated after 11:00 on January 8 cannot be collected.	N/A
SDK	Traffic generated when the SDK reports logs	You are advised to use SDK 1.0.0 or later. If an earlier version is used, upgrade it as soon as possible. Otherwise, the SLA cannot be guaranteed.	The SDK of an earlier version may cause reporting failures.
SDK	Device SDK	Currently, this function is in the closed beta test and is not recommended in the production environment.	In the closed beta test, frequent iterations may occur. You need to perform product upgrade when necessary.