Limits of LindormTSDB - Lindorm - Alibaba Cloud Documentation Center

LindormTSDB has limits on naming rules, engine quotas, and other aspects. To ensure your business operates normally, read limits described in this topic before you use Lindorm for data development.

Naming rules

Database object	Limits
Database name	The name must be 2 to 64 characters in length. The name can contain digits, uppercase letters, lowercase letters, and underscores (_).
Table name	The name must be up to 128 characters in length. The name can contain digits, uppercase letters, lowercase letters, and underscores (_).
Tag column name	The name must be up to 200 characters in length. The column name must contain only visible characters.
Field column name	The name must be up to 200 characters in length. The column name must contain only visible characters.
Timestamp column name	The name must be up to 200 characters in length. The column name must contain only visible characters.

Quotas

The following table describes the quotas of LindormTSDB.

Quota	Limits
Number of databases	You can create up to 16 databases including the default database in LindormTSDB.
Number of tables	You can create up to 10,000 time series tables in a time series database.
Number of columns	You can create up to 1,024 columns including tag columns, timestamp columns, and field columns in a time series table.

Values

The following table describes the limits on values in LindormTSDB.

Value	Limits
Value of the tag column	The value must be up to 20,480 characters in length. The column value must contain only visible characters.
Value of the field column	The value must be up to 20,480 characters in length. The column value must contain only visible characters.
Value of the timestamp column	The column value must be a timestamp in milliseconds (ms).