### Install and Start Local Docs Server

Source: https://github.com/apache/druid-website/blob/asf-site/docs/36.0.0/development/contribute-to-docs/index.html

Install dependencies and start the local development server to preview documentation changes. This command should be run from the 'website' directory.

```bash
npm install
npm run start
```

--------------------------------

### Druid Quickstart Installation

Source: https://github.com/apache/druid-website/blob/asf-site/docs/0.20.1/tutorials/index.html

Steps to download and extract the Druid distribution for a quickstart installation.

```bash
tar -xzf apache-druid-0.20.1-bin.tar.gz
```

--------------------------------

### Install Website Dependencies and Build

Source: https://github.com/apache/druid-website/blob/asf-site/docs/37.0.0/development/contribute-to-docs/index.html

Install necessary dependencies for the website and build the site. This is typically done once.

```bash
npm install
npm run build
```

--------------------------------

### Start Local Development Server

Source: https://github.com/apache/druid-website/blob/asf-site/docs/latest/development/contribute-to-docs/index.html

Build and start the local development server to preview your documentation changes. This command is run from the 'website' directory.

```bash
npm run start
```

--------------------------------

### Partitioning Rule Example

Source: https://github.com/apache/druid-website/blob/asf-site/docs/37.0.0/data-management/cascading-reindexing/index.html

Example of a partitioning rule for compacting data into daily segments with range partitioning.

```json
{
  "id": "daily-range-30d",
  "olderThan": "P30D",
  "segmentGranularity": "DAY",
  "partitionsSpec": {
    "type": "range",
    "targetRowsPerSegment": 5000000,
    "partitionDimensions": ["channel", "countryName"]
  },
  "description": "Compact to daily segments with range partitioning for data older than 30 days"
}
```

--------------------------------

### Build and Test Documentation Locally

Source: https://github.com/apache/druid-website/blob/asf-site/docs/33.0.0/development/contribute-to-docs/index.html

Navigate to the website directory, install dependencies, build the site, and start a local development server to preview your changes.

```bash
cd website
npm install
npm run start
```

--------------------------------

### Example log4j2.xml Configuration

Source: https://github.com/apache/druid-website/blob/asf-site/docs/25.0.0/configuration/logging.html

This is an example log4j2.xml configuration based on the micro quickstart. It demonstrates how to set the log directory, configure console and rolling file appenders, and define logging levels for different loggers. Modify this file to customize your logging setup.

```xml
<?xml version="1.0" encoding="UTF-8" ?>
<Configuration status="WARN">
  <Properties>
    <!-- to change log directory, set DRUID_LOG_DIR environment variable to your directory before launching Druid -->
    <Property name="druid.log.path" value="log" />
  </Properties>

  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{ISO8601} %p [%t] %c - %m%n"/>
    </Console>

    <!-- Rolling Files-->
    <RollingRandomAccessFile name="FileAppender"
                             fileName="${sys:druid.log.path}/${sys:druid.node.type}.log"
                             filePattern="${sys:druid.log.path}/${sys:druid.node.type}.%d{yyyyMMdd}.log">
      <PatternLayout pattern="%d{ISO8601} %p [%t] %c - %m%n"/>
      <Policies>
        <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
      </Policies>
      <DefaultRolloverStrategy>
        <Delete basePath="${sys:druid.log.path}/" maxDepth="1">
          <IfFileName glob="*.log" />
          <IfLastModified age="7d" />
        </Delete>
      </DefaultRolloverStrategy>
    </RollingRandomAccessFile>

  </Appenders>

  <Loggers>
    <Root level="info">
      <AppenderRef ref="FileAppender"/>
    </Root>

    <!-- Set level="debug" to see stack traces for query errors -->
    <Logger name="org.apache.druid.server.QueryResource" level="info" additivity="false">
      <Appender-ref ref="FileAppender"/>
    </Logger>
    <Logger name="org.apache.druid.server.QueryLifecycle" level="info" additivity="false">

```

--------------------------------

### Install Dependencies and Build Website

Source: https://github.com/apache/druid-website/blob/asf-site/docs/34.0.0/development/contribute-to-docs/index.html

Navigate to the 'website' directory and install necessary npm packages. Then, build the website to test your changes locally. This command only needs to be run once.

```bash
cd website
npm install
npm run build
```

--------------------------------

### Install Python Packages for Local Setup

Source: https://github.com/apache/druid-website/blob/asf-site/docs/27.0.0/tutorials/tutorial-jupyter-docker/index.html

Installs the 'requests' and 'jupyterlab' packages required for running Jupyter Notebook tutorials locally. Ensure you have Python and pip installed.

```bash
# Install requests
pip install requests

# Install JupyterLab
pip install jupyterlab

# Install Jupyter Notebook
pip install notebook
```

--------------------------------

### Create Sample Data Directory

Source: https://github.com/apache/druid-website/blob/asf-site/docs/25.0.0/tutorials/tutorial-kafka.html

Create a directory to store sample data for the tutorial.

```bash
mkdir sample-data
```

--------------------------------

### Example Output of Starting Druid Services

Source: https://github.com/apache/druid-website/blob/asf-site/docs/0.16.0-incubating/tutorials/index.html

Illustrates the expected output when running the start-micro-quickstart script, showing the startup of Zookeeper and various Druid services.

```text
$ ./bin/start-micro-quickstart
[Fri May  3 11:40:50 2019] Running command[zk], logging to[/apache-druid-0.16.0-incubating/var/sv/zk.log]: bin/run-zk conf
[Fri May  3 11:40:50 2019] Running command[coordinator-overlord], logging to[/apache-druid-0.16.0-incubating/var/sv/coordinator-overlord.log]: bin/run-druid coordinator-overlord conf/druid/single-server/micro-quickstart
[Fri May  3 11:40:50 2019] Running command[broker], logging to[/apache-druid-0.16.0-incubating/var/sv/broker.log]: bin/run-druid broker conf/druid/single-server/micro-quickstart
[Fri May  3 11:40:50 2019] Running command[router], logging to[/apache-druid-0.16.0-incubating/var/sv/router.log]: bin/run-druid router conf/druid/single-server/micro-quickstart
[Fri May  3 11:40:50 2019] Running command[historical], logging to[/apache-druid-0.16.0-incubating/var/sv/historical.log]: bin/run-druid historical conf/druid/single-server/micro-quickstart
[Fri May  3 11:40:50 2019] Running command[middleManager], logging to[/apache-druid-0.16.0-incubating/var/sv/middleManager.log]: bin/run-druid middleManager conf/druid/single-server/micro-quickstart
```

--------------------------------

### Install and Start Zookeeper on Master Server

Source: https://github.com/apache/druid-website/blob/asf-site/docs/0.15.0-incubating/tutorials/cluster.md

Steps to download, extract, and move ZooKeeper, and then start the Master server processes with ZK.

```bash
curl http://www.gtlib.gatech.edu/pub/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz -o zookeeper-3.4.11.tar.gz
tar -xzf zookeeper-3.4.11.tar.gz
mv zookeeper-3.4.11 zk
```

```bash
bin/start-cluster-master-with-zk-server
```

--------------------------------

### Install and Start Zookeeper

Source: https://github.com/apache/druid-website/blob/asf-site/docs/0.13.0-incubating/tutorials/cluster.md

Download, extract, configure, and start Zookeeper on the coordination server. Ensure you copy the sample configuration to zoo.cfg.

```bash
curl http://www.gtlib.gatech.edu/pub/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz -o zookeeper-3.4.11.tar.gz
tar -xzf zookeeper-3.4.11.tar.gz
cd zookeeper-3.4.11
cp conf/zoo_sample.cfg conf/zoo.cfg
./bin/zkServer.sh start
```

--------------------------------

### Start Druid Micro-Quickstart

Source: https://github.com/apache/druid-website/blob/asf-site/docs/0.15.0-incubating/tutorials/index.md

Run this command from the apache-druid-0.15.0-incubating package root to start all Druid services on a single machine.

```bash
./bin/start-micro-quickstart
```

--------------------------------

### Start Druid Services

Source: https://github.com/apache/druid-website/blob/asf-site/docs/28.0.0/tutorials/index.html

Starts all Druid services for a single-server setup. You can specify the total memory available to Druid using the -m flag.

```bash
./bin/start-druid

```

```bash
./bin/start-druid -m 16g

```

--------------------------------

### Example log4j2.xml Configuration

Source: https://github.com/apache/druid-website/blob/asf-site/docs/32.0.1/configuration/logging/index.html

This is an example log4j2.xml configuration file based on the micro quickstart. It demonstrates how to configure daily log rollover and retention policies.

```xml
<configuration status="WARN">
    <appenders>
        <appender name="console" type="Console" target="SYSTEM_OUT">
            <patternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %level{length=5} %thread %logger{1} - %msg%n"/>
        </appender>
        <appender name="rolling-file" type="RollingRandomAccessFile" fileName="/tmp/druid/log/druid.log" filePattern="/tmp/druid/log/druid-%d{yyyy-MM-dd}.log.gz">
            <patternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %level{length=5} %thread %logger{1} - %msg%n"/>
            <rollingPolicy type="TimeBasedRollingPolicy" activeFileName="/tmp/druid/log/druid.log" filePattern="/tmp/druid/log/druid-%d{yyyy-MM-dd}.log.gz">
                <integer value="7" name="maxHistory"/>
            </rollingPolicy>
        </appender>
    </appenders>
    <loggers>
        <root level="info">
            <appender-ref ref="console"/>
            <appender-ref ref="rolling-file"/>
        </root>
    </loggers>
</configuration>
```