- Telegraf is a data collector, it actively collects data points and sends them to …
- InfluxDB, which is a time series database. In order to see what’s stored there, …
- Chronograf is a graphing and visualization tool. But to trigger alarms, analyze the time series data, you use …
- Kapacitor, which is capable of “monitoring” your streams of data, ie your time series.
The “line protocol” for data points in a InfluxDB series looks like this:
<measurement>,<tag_0>[,<tag_n>] <field=value>[,<field_n=value_n>] [timestamp]
os_metrics,host=i-823456ac,role=mongodb,type=m3-large cpu-load-1=1.2,cpu-load-5=0.8,cpu-load-5=0.6 1490520338000000 os_metrics,host=i-823456ac,role=mongodb,type=m3-large deb-packages-installed=327i 1490520338000000
Everything’s a string, except
timestamp, which is nanoseconds since unix epoch
fieldvalues, which can be int, float, boolean, or strings.
measurement is close to a SQL database table: you can easily work on the fields and tags in the same measurement/table, but if you need data from some other
measurement you’ll need to
join them together.
For quering the data, all
tags are indexed, whereas
fields are not.