Remove unnecessary python topic. Style changes to quickstart. (#13647)

Co-authored-by: Victoria Lim <vtlim@users.noreply.github.com>

docs/operations/python.md

@@ -1,49 +0,0 @@
----
-id: python
-title: "Python Installation"
----
-
-<!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one
-  ~ or more contributor license agreements.  See the NOTICE file
-  ~ distributed with this work for additional information
-  ~ regarding copyright ownership.  The ASF licenses this file
-  ~ to you under the Apache License, Version 2.0 (the
-  ~ "License"); you may not use this file except in compliance
-  ~ with the License.  You may obtain a copy of the License at
-  ~
-  ~   http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing,
-  ~ software distributed under the License is distributed on an
-  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-  ~ KIND, either express or implied.  See the License for the
-  ~ specific language governing permissions and limitations
-  ~ under the License.
-  -->
-
-Apache Druid startup script requires Python2 or Python3 interpreter. 
-Since Python2 is deprecated, this document has instructions to install Python3 interpreter.
-
-## Python3 interpreter installation instructions
-
-### Linux
-
-#### Debian or Ubuntu
-    - `sudo apt update`
-    - `sudo apt install -y python3-pip`
-#### RHEL
-    - `sudo yum install -y epel-release`
-    - `sudo yum install -y python3-pip`
-
-### MacOS
-
-#### Install with Homebrew
-Refer [Installing Python 3 on Mac OS X](https://docs.python-guide.org/starting/install3/osx/)
-
-#### Install the official Python release
-* Browse to the [Python Downloads Page](https://www.python.org/downloads/) and download the latest version (3.x.x)
-
-Verify if Python3 is installed by issuing `python3 --version` command.
-
-

docs/tutorials/cluster.md

@@ -133,7 +133,7 @@ The [basic cluster tuning guide](../operations/basic-cluster-tuning.md) has info
 We recommend running your favorite Linux distribution. You will also need 
 
 * [Java 8 or 11](../operations/java.md).
-* [Python2 or Python3](../operations/python.md)  
+* Python 2 or Python 3
 
 > If needed, you can specify where to find Java using the environment variables
 > `DRUID_JAVA_HOME` or `JAVA_HOME`. For more details run the `bin/verify-java` script.

docs/tutorials/index.md

@@ -22,9 +22,9 @@ title: "Quickstart (local)"
   ~ under the License.
   -->
 
-This quickstart gets you started with Apache Druid and introduces you to Druid ingestion and query features. For this tutorial, we recommend a machine with at least 6 GB of RAM.
+This quickstart helps you install Apache Druid and introduces you to Druid ingestion and query features. For this tutorial, you need a machine with at least 6 GiB of RAM.
 
-In this quickstart, you'll do the following:
+In this quickstart, you'll:
 - install Druid
 - start up Druid services
 - use SQL to ingest and query data
@@ -32,20 +32,19 @@ In this quickstart, you'll do the following:
 Druid supports a variety of ingestion options. Once you're done with this tutorial, refer to the
 [Ingestion](../ingestion/index.md) page to determine which ingestion method is right for you.
 
-## Requirements
+## Prerequisites
 
-You can follow these steps on a relatively modest machine, such as a workstation or virtual server with 16 GiB of RAM.
+You can follow these steps on a relatively modest machine, such as a workstation or virtual server with 6 GiB of RAM.
 
 The software requirements for the installation machine are:
 
 * Linux, Mac OS X, or other Unix-like OS. (Windows is not supported)
 * [Java 8u92+ or Java 11](../operations/java.md)
-* [Python2 or Python3](../operations/python.md)
+* Python 3 (preferred) or Python 2
 * Perl 5
 
-> Druid relies on the environment variables `JAVA_HOME` or `DRUID_JAVA_HOME` to find Java on the machine. You can set
+Java must be available. Either it is on your path, or set one of the `JAVA_HOME` or `DRUID_JAVA_HOME` environment variables.
-`DRUID_JAVA_HOME` if there is more than one instance of Java. To verify Java requirements for your environment, run the 
+You can run `apache-druid-{{DRUIDVERSION}}/bin/verify-java` to verify Java requirements for your environment.
-`bin/verify-java` script.
 
 Before installing a production Druid instance, be sure to review the [security
 overview](../operations/security-overview.md). In general, avoid running Druid as root user. Consider creating a
@@ -69,7 +68,7 @@ The distribution directory contains `LICENSE` and `NOTICE` files and subdirector
 Start up Druid services using the automatic single-machine configuration.
 This configuration includes default settings that are appropriate for this tutorial, such as loading the `druid-multi-stage-query` extension by default so that you can use the MSQ task engine.
 
-You can view that setting and others in the configuration files in the `conf/druid/auto`. 
+You can view the default settings in the configuration files located in `conf/druid/auto`.
 
 From the apache-druid-{{DRUIDVERSION}} package root, run the following command:
 
@@ -77,7 +76,8 @@ From the apache-druid-{{DRUIDVERSION}} package root, run the following command:
 ./bin/start-druid
 ```
 
-This brings up instances of ZooKeeper and the Druid services and may use up to 80% of the total available system memory. To explicitly set the total memory available to Druid, pass a value for the memory parameter, e.g. `./bin/start-druid -m 16g` or `./bin/start-druid --memory 16g`.
+This launches instances of ZooKeeper and the Druid services.
+For example:
 
 ```bash
 $ ./bin/start-druid
@@ -93,8 +93,11 @@ $ ./bin/start-druid
 [Tue Nov 29 16:31:06 2022] Running command[middleManager]: bin/run-druid middleManager /apache-druid-{{DRUIDVERSION}}/conf/druid/single-server/quickstart '-Xms64m -Xmx64m' '-Ddruid.worker.capacity=2 -Ddruid.indexer.runner.javaOptsArray=["-server","-Duser.timezone=UTC","-Dfile.encoding=UTF-8","-XX:+ExitOnOutOfMemoryError","-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager","-Xms256m","-Xmx256m","-XX:MaxDirectMemorySize=256m"]'
 ```
 
-All persistent state, such as the cluster metadata store and segments for the services, are kept in the `var` directory under 
+Druid may use up to 80% of the total available system memory.
-the Druid root directory, apache-druid-{{DRUIDVERSION}}. Each service writes to a log file under `var/sv`.
+To explicitly set the total memory available to Druid, pass a value for the memory parameter. For example, `./bin/start-druid -m 16g`. 
+
+Druid stores all persistent state data, such as the cluster metadata store and data segments, in `apache-druid-{{DRUIDVERSION}}/var`.
+Each service writes to a log file under `apache-druid-{{DRUIDVERSION}}/log`.
 
 At any time, you can revert Druid to its original, post-installation state by deleting the entire `var` directory. You may want to do this, for example, between Druid tutorials or after experimentation, to start with a fresh instance. 
 
@@ -102,7 +105,7 @@ To stop Druid at any time, use CTRL+C in the terminal. This exits the `bin/start
 
 ## Open the web console 
 
-After the Druid services finish startup, open the [web console](../operations/web-console.md) at [http://localhost:8888](http://localhost:8888). 
+After starting the Druid services, open the [web console](../operations/web-console.md) at [http://localhost:8888](http://localhost:8888). 
 
 ![web console](../assets/tutorial-quickstart-01.png "web console")