85 lines
3.4 KiB
Plaintext
85 lines
3.4 KiB
Plaintext
---
|
|
sidebar_label: OpenTSDB Line Protocol
|
|
title: OpenTSDB Line Protocol
|
|
---
|
|
|
|
import Tabs from "@theme/Tabs";
|
|
import TabItem from "@theme/TabItem";
|
|
import JavaTelnet from "./_java_opts_telnet.mdx";
|
|
import PyTelnet from "./_py_opts_telnet.mdx";
|
|
import GoTelnet from "./_go_opts_telnet.mdx";
|
|
import RustTelnet from "./_rust_opts_telnet.mdx";
|
|
import NodeTelnet from "./_js_opts_telnet.mdx";
|
|
import CsTelnet from "./_cs_opts_telnet.mdx";
|
|
import CTelnet from "./_c_opts_telnet.mdx";
|
|
|
|
## Introduction
|
|
|
|
A single line of text is used in OpenTSDB line protocol to represent one row of data. OpenTSDB employs a single column data model, so each line can only contain a single data column. There can be multiple tags. Each line contains 4 parts as below:
|
|
|
|
```
|
|
<metric> <timestamp> <value> <tagk_1>=<tagv_1>[ <tagk_n>=<tagv_n>]
|
|
```
|
|
|
|
- `metric` will be used as the STable name.
|
|
- `timestamp` is the timestamp of current row of data. The time precision will be determined automatically based on the length of the timestamp. Second and millisecond time precision are supported.
|
|
- `value` is a metric which must be a numeric value, the corresponding column name is "value".
|
|
- The last part is the tag set separated by spaces, all tags will be converted to nchar type automatically.
|
|
|
|
For example:
|
|
|
|
```txt
|
|
meters.current 1648432611250 11.3 location=California.LoSangeles groupid=3
|
|
```
|
|
|
|
Please refer to [OpenTSDB Telnet API](http://opentsdb.net/docs/build/html/api_telnet/put.html) for more details.
|
|
|
|
## Examples
|
|
|
|
<Tabs defaultValue="java" groupId="lang">
|
|
<TabItem label="Java" value="java">
|
|
<JavaTelnet />
|
|
</TabItem>
|
|
<TabItem label="Python" value="Python">
|
|
<PyTelnet />
|
|
</TabItem>
|
|
<TabItem label="Go" value="go">
|
|
<GoTelnet />
|
|
</TabItem>
|
|
<TabItem label="Rust" value="rust">
|
|
<RustTelnet />
|
|
</TabItem>
|
|
<TabItem label="Node.js" value="nodejs">
|
|
<NodeTelnet />
|
|
</TabItem>
|
|
<TabItem label="C#" value="csharp">
|
|
<CsTelnet />
|
|
</TabItem>
|
|
<TabItem label="C" value="c">
|
|
<CTelnet />
|
|
</TabItem>
|
|
</Tabs>
|
|
|
|
2 STables will be created automatically and each STable has 4 rows of data in the above sample code.
|
|
|
|
```cmd
|
|
taos> use test;
|
|
Database changed.
|
|
|
|
taos> show STables;
|
|
name | created_time | columns | tags | tables |
|
|
============================================================================================
|
|
meters.current | 2022-03-30 17:04:10.877 | 2 | 2 | 2 |
|
|
meters.voltage | 2022-03-30 17:04:10.882 | 2 | 2 | 2 |
|
|
Query OK, 2 row(s) in set (0.002544s)
|
|
|
|
taos> select tbname, * from `meters.current`;
|
|
tbname | ts | value | groupid | location |
|
|
==================================================================================================================================
|
|
t_0e7bcfa21a02331c06764f275... | 2022-03-28 09:56:51.249 | 10.800000000 | 3 | California.LoSangeles |
|
|
t_0e7bcfa21a02331c06764f275... | 2022-03-28 09:56:51.250 | 11.300000000 | 3 | California.LoSangeles |
|
|
t_7e7b26dd860280242c6492a16... | 2022-03-28 09:56:51.249 | 10.300000000 | 2 | California.SanFrancisco |
|
|
t_7e7b26dd860280242c6492a16... | 2022-03-28 09:56:51.250 | 12.600000000 | 2 | California.SanFrancisco |
|
|
Query OK, 4 row(s) in set (0.005399s)
|
|
```
|