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Igal Levy 2014-03-25 17:19:55 -07:00
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docs/content/Plumber.md
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# Druid Plumbers
The Plumber is the thing that handles generated segments both while they are being generated and when they are "done". This is also technically a pluggable interface and there are multiple implementations, but there are a lot of details handled by the plumber such that it is expected that there will only be a few implementations and only more advanced third-parties will implement their own.
The Plumber handles generated segments both while they are being generated and when they are "done". This is also technically a pluggable interface and there are multiple implementations. However, plumbers handle numerous complex details, and therefore an advanced understanding of Druid is recommended before implementing your own.
|Field|Type|Description|Required|
|-----|----|-----------|--------|
|type|String|Specifies the type of plumber. Each value will have its own configuration schema, plumbers packaged with Druid are described below.|yes|
We provide a brief description of the example to exemplify the types of things that are configured on the plumber.
The following can be configured on the plumber:
* `windowPeriod` is the amount of lag time to allow events. This is configured with a 10 minute window, meaning that any event more than 10 minutes ago will be thrown away and not included in the segment generated by the realtime server.
* `basePersistDirectory` is the directory to put things that need persistence. The plumber is responsible for the actual intermediate persists and this tells it where to store those persists.