[docs] Update Pulsar SQL configuration and deployment (apache#5651)

### Motivation
The structure and content needs improvement.

### Modifications
1. Improve the structure.
2. Improve the deployment steps.

site2/docs/sql-deployment-configurations.md

@@ -1,14 +1,13 @@
 ---
 id: sql-deployment-configurations
-title: Pulsar SQL Deployment and Configuration
-sidebar_label: Deployment and Configuration
+title: Pulsar SQL configuration and deployment
+sidebar_label: Configuration and deployment
 ---
 
-Below is a list configurations for the Presto Pulsar connector and instruction on how to deploy a cluster.
+You can configure Presto Pulsar connector and deploy a cluster with the following instruction.
 
-## Presto Pulsar Connector Configurations
-There are several configurations for the Presto Pulsar Connector.  The properties file that contain these configurations can be found at ```${project.root}/conf/presto/catalog/pulsar.properties```.
-The configurations for the connector and its default values are discribed below.
+## Configure Presto Pulsar Connector
+You can configure Presto Pulsar Connector in the `${project.root}/conf/presto/catalog/pulsar.properties` properties file. The configuration for the connector and the default values are as follows.
 
 ```properties
 # name of the connector to be displayed in the catalog
@@ -27,21 +26,22 @@ pulsar.entry-read-batch-size=100
 pulsar.target-num-splits=4
 ```
 
-## Query Pulsar from Existing Presto Cluster
+## Query data from existing Presto clusters
 
-If you already have an existing Presto cluster, you can copy Presto Pulsar connector plugin to your existing cluster.  You can download the archived plugin package via:
+If you already have a Presto cluster, you can copy the Presto Pulsar connector plugin to your existing cluster. Download the archived plugin package with the following command.
 
 ```bash
 $ wget pulsar:binary_release_url
 ```
 
-## Deploying a new cluster
+## Deploy a new cluster
 
-Please note that the [Getting Started](sql-getting-started.md) guide shows you how to easily setup a standalone single node enviroment to experiment with.
+Since Pulsar SQL is powered by [Presto](https://prestodb.io), the configuration for deployment is the same for the Pulsar SQL worker. 
 
-Pulsar SQL is powered by [Presto](https://prestodb.io) thus many of the configurations for deployment is the same for the Pulsar SQL worker.
+> Note  
+> For how to set up a standalone single node environment, refer to [Query data](sql-getting-started.md). 
 
-You can use the same CLI args as the Presto launcher:
+You can use the same CLI args as the Presto launcher.
 
 ```bash
 $ ./bin/pulsar sql-worker --help
@@ -72,27 +72,27 @@ Options:
 
 ```
 
-There is a set of default configs for the cluster located in ```${project.root}/conf/presto``` that will be used by default.  You can change them to customize your deployment
+The default configuration for the cluster is located in `${project.root}/conf/presto`. You can customize your deployment by modifying the default configuration.
 
-You can also set the worker to read from a different configuration directory as well as set a different directory for writing its data:
+You can set the worker to read from a different configuration directory, or set a different directory to write data. 
 
 ```bash
 $ ./bin/pulsar sql-worker run --etc-dir /tmp/incubator-pulsar/conf/presto --data-dir /tmp/presto-1
 ```
 
-You can also start the worker as daemon process:
+You can start the worker as daemon process.
 
 ```bash
 $ ./bin sql-worker start
 ```
 
-### Deploying to a 3 node cluster
+### Deploy a cluster on multiple nodes 
 
-For example, if I wanted to deploy a Pulsar SQL/Presto cluster on 3 nodes, you can do the following:
+You can deploy a Pulsar SQL cluster or Presto cluster on multiple nodes. The following example shows how to deploy a cluster on three-node cluster. 
 
-First, copy the Pulsar binary distribution to all three nodes.
+1. Copy the Pulsar binary distribution to three nodes.
 
-The first node, will run the Presto coordinator.  The mininal configuration in ```${project.root}/conf/presto/config.properties``` can be the following
+The first node runs as Presto coordinator. The minimal configuration requirement in the `${project.root}/conf/presto/config.properties` file is as follows. 
 
 ```properties
 coordinator=true
@@ -104,37 +104,37 @@ discovery-server.enabled=true
 discovery.uri=<coordinator-url>
 ```
 
-Also, modify ```pulsar.broker-service-url``` and  ```pulsar.zookeeper-uri``` configs in ```${project.root}/conf/presto/catalog/pulsar.properties``` on those nodes accordingly
-
-Afterwards, you can start the coordinator by just running
-
-```$ ./bin/pulsar sql-worker run```
-
-For the other two nodes that will only serve as worker nodes, the configurations can be the following:
+The other two nodes serve as worker nodes, you can use the following configuration for worker nodes. 
 
 ```properties
 coordinator=false
 http-server.http.port=8080
 query.max-memory=50GB
 query.max-memory-per-node=1GB
 discovery.uri=<coordinator-url>
-
 ```
 
-Also, modify ```pulsar.broker-service-url``` and  ```pulsar.zookeeper-uri``` configs in ```${project.root}/conf/presto/catalog/pulsar.properties``` accordingly
+2. Modify `pulsar.broker-service-url` and  `pulsar.zookeeper-uri` configuration in the `${project.root}/conf/presto/catalog/pulsar.properties` file accordingly for the three nodes.
+
+3. Start the coordinator node.
+
+```
+$ ./bin/pulsar sql-worker run
+```
 
-You can also start the worker by just running:
+4. Start worker nodes.
 
-```$ ./bin/pulsar sql-worker run```
+```
+$ ./bin/pulsar sql-worker run
+```
 
-You can check the status of your cluster from the SQL CLI.  To start the SQL CLI:
+5. Start the SQL CLI and check the status of your cluster.
 
 ```bash
 $ ./bin/pulsar sql --server <coordinate_url>
-
 ```
 
-You can then run the following command to check the status of your nodes:
+6. Check the status of your nodes.
 
 ```bash
 presto> SELECT * FROM system.runtime.nodes;
@@ -145,8 +145,4 @@ presto> SELECT * FROM system.runtime.nodes;
  2       | http://192.168.2.3:8081 | testversion  | false       | active 
 ```
 
-
-For more information about deployment in Presto, please reference:
-
-[Deploying Presto](https://prestodb.io/docs/current/installation/deployment.html)
-
+For more information about deployment in Presto, refer to [Presto deployment](https://prestodb.io/docs/current/installation/deployment.html).