Write data to InfluxDB 3 Core

Use tools like the influxdb3 CLI, Telegraf, and InfluxDB client libraries to write time series data to InfluxDB 3 Core. line protocol is the text-based format used to write data to InfluxDB.

• Choose the write endpoint for your workload

  • Timestamp precision across write APIs

• Line protocol

  • Line protocol elements

• Write data to InfluxDB

  • Use InfluxDB client libraries to write data
  • Use the InfluxDB HTTP API to write data
  • Use Telegraf to write data
  • Use the influxdb3 CLI to write data
  • Best practices for writing data
  • Troubleshoot issues writing data

Timestamp precision across write APIs

InfluxDB 3 Core provides multiple write endpoints for compatibility with different InfluxDB versions. The following table compares timestamp precision support across v1, v2, and v3 write APIs:

• All write endpoints accept timestamps in line protocol format.
• InfluxDB 3 Core multiplies timestamps by the appropriate precision value to convert them to nanoseconds for internal storage.
• All timestamps are stored internally as nanoseconds regardless of the precision specified when writing.

Line protocol

All data written to InfluxDB is written using line protocol, a text-based format that lets you provide the necessary information to write a data point to InfluxDB.

Line protocol elements

In InfluxDB, a point contains a table name, one or more fields, a timestamp, and optional tags that provide metadata about the observation.

Each line of line protocol contains the following elements:

• * table: A string that identifies the table to store the data in.
• tag set: Comma-delimited list of key value pairs, each representing a tag. Tag keys and values are unquoted strings. Spaces, commas, and equal characters must be escaped.
• * field set: Comma-delimited list of key value pairs, each representing a field. Field keys are unquoted strings. Spaces and commas must be escaped. Field values can be strings (quoted), floats, integers, unsigned integers, or booleans.
• timestamp: Unix timestamp associated with the data. InfluxDB supports up to nanosecond precision. If the precision of the timestamp is not in nanoseconds, you must specify the precision when writing the data to InfluxDB.

Line protocol element parsing

• table: Everything before the first unescaped comma before the first whitespace.
• tag set: Key-value pairs between the first unescaped comma and the first unescaped whitespace.
• field set: Key-value pairs between the first and second unescaped whitespaces.
• timestamp: Integer value after the second unescaped whitespace.
• Lines are separated by the newline character (\n). Line protocol is whitespace sensitive.

For schema design recommendations, see InfluxDB schema design.

Write data to InfluxDB