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 <h1 id="statsd-emitter">StatsD Emitter</h1>

 <p>To use this Apache Druid (incubating) extension, make sure to <a href="../../operations/including-extensions.html">include</a> <code>statsd-emitter</code> extension.</p>

 <h2 id="introduction">Introduction</h2>

 <p>This extension emits druid metrics to a StatsD server.
 (https://github.com/etsy/statsd)
 (https://github.com/armon/statsite)</p>

 <h2 id="configuration">Configuration</h2>

 <p>All the configuration parameters for the StatsD emitter are under <code>druid.emitter.statsd</code>.</p>

 <table><thead>
 <tr>
 <th>property</th>
 <th>description</th>
 <th>required?</th>
 <th>default</th>
 </tr>
 </thead><tbody>
 <tr>
 <td><code>druid.emitter.statsd.hostname</code></td>
 <td>The hostname of the StatsD server.</td>
 <td>yes</td>
 <td>none</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.port</code></td>
 <td>The port of the StatsD server.</td>
 <td>yes</td>
 <td>none</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.prefix</code></td>
 <td>Optional metric name prefix.</td>
 <td>no</td>
 <td>&quot;&quot;</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.separator</code></td>
 <td>Metric name separator</td>
 <td>no</td>
 <td>.</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.includeHost</code></td>
 <td>Flag to include the hostname as part of the metric name.</td>
 <td>no</td>
 <td>false</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.dimensionMapPath</code></td>
 <td>JSON file defining the StatsD type, and desired dimensions for every Druid metric</td>
 <td>no</td>
 <td>Default mapping provided. See below.</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.blankHolder</code></td>
 <td>The blank character replacement as statsD does not support path with blank character</td>
 <td>no</td>
 <td>&quot;-&quot;</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.dogstatsd</code></td>
 <td>Flag to enable <a href="https://docs.datadoghq.com/developers/dogstatsd/">DogStatsD</a> support. Causes dimensions to be included as tags, not as a part of the metric name. <code>convertRange</code> fields will be ignored.</td>
 <td>no</td>
 <td>false</td>
 </tr>
 <tr>
 <td><code>druid.emitter.statsd.dogstatsdConstantTags</code></td>
 <td>If <code>druid.emitter.statsd.dogstatsd</code> is true, the tags in the JSON list of strings will be sent with every event.</td>
 <td>no</td>
 <td>[]</td>
 </tr>
 </tbody></table>

 <h3 id="druid-to-statsd-event-converter">Druid to StatsD Event Converter</h3>

 <p>Each metric sent to StatsD must specify a type, one of <code>[timer, counter, guage]</code>. StatsD Emitter expects this mapping to
 be provided as a JSON file.  Additionally, this mapping specifies which dimensions should be included for each metric.
 StatsD expects that metric values be integers.  Druid emits some metrics with values between the range 0 and 1. To accommodate these metrics they are converted
 into the range 0 to 100.  This conversion can be enabled by setting the optional &quot;convertRange&quot; field true in the JSON mapping file.
 If the user does not specify their own JSON file, a default mapping is used.  All
 metrics are expected to be mapped. Metrics which are not mapped will log an error.
 StatsD metric path is organized using the following schema:
 <code>&lt;druid metric name&gt; : { &quot;dimensions&quot; : &lt;dimension list&gt;, &quot;type&quot; : &lt;StatsD type&gt;, &quot;convertRange&quot; : true/false}</code>
 e.g.
 <code>query/time&quot; : { &quot;dimensions&quot; : [&quot;dataSource&quot;, &quot;type&quot;], &quot;type&quot; : &quot;timer&quot;}</code></p>

 <p>For metrics which are emitted from multiple services with different dimensions, the metric name is prefixed with
 the service name.
 e.g.
 <code>&quot;coordinator-segment/count&quot; : { &quot;dimensions&quot; : [&quot;dataSource&quot;], &quot;type&quot; : &quot;gauge&quot; },
  &quot;historical-segment/count&quot; : { &quot;dimensions&quot; : [&quot;dataSource&quot;, &quot;tier&quot;, &quot;priority&quot;], &quot;type&quot; : &quot;gauge&quot; }</code></p>

 <p>For most use-cases, the default mapping is sufficient.</p>

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	<h1 id="statsd-emitter">StatsD Emitter</h1>

	<p>To use this Apache Druid (incubating) extension, make sure to <a href="../../operations/including-extensions.html">include</a> <code>statsd-emitter</code> extension.</p>

	<h2 id="introduction">Introduction</h2>

	<p>This extension emits druid metrics to a StatsD server.
	(https://github.com/etsy/statsd)
	(https://github.com/armon/statsite)</p>

	<h2 id="configuration">Configuration</h2>

	<p>All the configuration parameters for the StatsD emitter are under <code>druid.emitter.statsd</code>.</p>

	<table><thead>
	<tr>
	<th>property</th>
	<th>description</th>
	<th>required?</th>
	<th>default</th>
	</tr>
	</thead><tbody>
	<tr>
	<td><code>druid.emitter.statsd.hostname</code></td>
	<td>The hostname of the StatsD server.</td>
	<td>yes</td>
	<td>none</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.port</code></td>
	<td>The port of the StatsD server.</td>
	<td>yes</td>
	<td>none</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.prefix</code></td>
	<td>Optional metric name prefix.</td>
	<td>no</td>
	<td>""</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.separator</code></td>
	<td>Metric name separator</td>
	<td>no</td>
	<td>.</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.includeHost</code></td>
	<td>Flag to include the hostname as part of the metric name.</td>
	<td>no</td>
	<td>false</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.dimensionMapPath</code></td>
	<td>JSON file defining the StatsD type, and desired dimensions for every Druid metric</td>
	<td>no</td>
	<td>Default mapping provided. See below.</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.blankHolder</code></td>
	<td>The blank character replacement as statsD does not support path with blank character</td>
	<td>no</td>
	<td>"-"</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.dogstatsd</code></td>
	<td>Flag to enable <a href="https://docs.datadoghq.com/developers/dogstatsd/">DogStatsD</a> support. Causes dimensions to be included as tags, not as a part of the metric name. <code>convertRange</code> fields will be ignored.</td>
	<td>no</td>
	<td>false</td>
	</tr>
	<tr>
	<td><code>druid.emitter.statsd.dogstatsdConstantTags</code></td>
	<td>If <code>druid.emitter.statsd.dogstatsd</code> is true, the tags in the JSON list of strings will be sent with every event.</td>
	<td>no</td>
	<td>[]</td>
	</tr>
	</tbody></table>

	<h3 id="druid-to-statsd-event-converter">Druid to StatsD Event Converter</h3>

	<p>Each metric sent to StatsD must specify a type, one of <code>[timer, counter, guage]</code>. StatsD Emitter expects this mapping to
	be provided as a JSON file. Additionally, this mapping specifies which dimensions should be included for each metric.
	StatsD expects that metric values be integers. Druid emits some metrics with values between the range 0 and 1. To accommodate these metrics they are converted
	into the range 0 to 100. This conversion can be enabled by setting the optional "convertRange" field true in the JSON mapping file.
	If the user does not specify their own JSON file, a default mapping is used. All
	metrics are expected to be mapped. Metrics which are not mapped will log an error.
	StatsD metric path is organized using the following schema:
	<code><druid metric name> : { "dimensions" : <dimension list>, "type" : <StatsD type>, "convertRange" : true/false}</code>
	e.g.
	<code>query/time" : { "dimensions" : ["dataSource", "type"], "type" : "timer"}</code></p>

	<p>For metrics which are emitted from multiple services with different dimensions, the metric name is prefixed with
	the service name.
	e.g.
	<code>"coordinator-segment/count" : { "dimensions" : ["dataSource"], "type" : "gauge" },
	"historical-segment/count" : { "dimensions" : ["dataSource", "tier", "priority"], "type" : "gauge" }</code></p>

	<p>For most use-cases, the default mapping is sufficient.</p>

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