Merge pull request #1913 from PFYasu/RDoc-2665-2695

RDoc-2695 & RDoc-2665 & RDoc-2876 Cloud Additional Product Node documentation

Documentation/4.2/Raven.Documentation.Pages/cloud/cloud-instances.markdown

@@ -93,13 +93,18 @@ number of IOPS reserved for your instances.
 {PANEL: A Production Cloud Cluster}
 
 The default production configuration is a three-node cluster, provisioned in separate 
-availability zones for maximum durability.  
+availability zones for maximum durability.
 
 RavenDB Cloud also offers **multi-region clusters** to minimize local latency and clusters 
 with a **higher number of nodes** to further distribute the cluster's workload.  
 [Contact Support](https://ravendb.net/contact) to provision customized cloud-based clusters 
 with configurations that suit your needs.  
 
+*Production tier* clusters can be also extended by [additional product nodes](../cloud/portal/cloud-portal-products-tab#nodes-additional-product-nodes).  
+{INFO: }
+This option is not available for **PS** instance types.
+{INFO/}
+
 !["Production Tier"](images\tiers-and-instances-003-production.png "Production Tier")
 
 {NOTE: }

Documentation/4.2/Raven.Documentation.Pages/cloud/cloud-scaling.markdown

@@ -17,6 +17,8 @@ two RavenDB instances using:
   * [Scaling Up/Down - General](../cloud/cloud-scaling#scaling-up/down---general)  
      - [Change instance type](../cloud/cloud-scaling#scaling---change-instance-type)  
      - [Change storage](../cloud/cloud-scaling#scaling---change-storage)  
+  * [Additional product nodes - General](#additional-product-nodes---general)
+     - [Adding a node to a database group](#additional-product-nodes---adding-a-node-to-a-database-group)
 
 {NOTE/}
 
@@ -146,6 +148,30 @@ default one.
 
 {PANEL/}
 
+{PANEL: Additional product nodes - General}
+The *Production Tier* products can be expanded by adding *additional nodes* to the cluster.
+
+![Figure 8 - Cluster view with additional product nodes](images/studio-cluster-view-with-additional-nodes.png "Figure 8 - Cluster view with additional product nodes")
+
+{INFO: }
+This option **is not available** for **PS** instance types.  
+The maximum number of additional nodes that can be added equals **3**.  
+Nodes *A*, *B*, *C* **cannot be removed**.  
+{INFO/}
+
+{WARNING: }
+The process of adding a new node **does not guarantee** that the node will be distributed in separated *Availability Zone*.
+{WARNING/}
+{PANEL/}
+
+{PANEL: Additional product nodes - Adding a node to a database group}
+The new product node **does not belong to any database group**. The User should do this *manually* by adding the new node to the database group.  
+This operation is described [here](https://ravendb.net/docs/article-page/latest/csharp/studio/database/settings/manage-database-group#database-group-topology---add-new-node).
+
+![Figure 9 - Add a new node to the database group](images/studio-add-new-node-to-database-group.png "Figure 9 - Add a new node to the database group")
+
+{PANEL/}
+
 ##Related Articles
 
 **Cloud**  

Documentation/4.2/Raven.Documentation.Pages/cloud/portal/cloud-portal-products-tab.markdown

@@ -16,6 +16,7 @@ and [Production](../../cloud/cloud-overview#the-production-tier).
      - [Change Instance Type and Storage](../../cloud/portal/cloud-portal-products-tab#change-instance-type-and-storage)  
      - [Security: Your Certificate and Allowed IPs](../../cloud/portal/cloud-portal-products-tab#security-your-certificate-and-allowed-ips)  
      - [Manage features](#manage-features)
+     - [Nodes: Additional product nodes](../../cloud/portal/cloud-portal-products-tab#nodes-additional-product-nodes)
      - [Maintenance and Danger Zones: Terminate and Restart your Instance](../../cloud/portal/cloud-portal-products-tab#maintenance-and-danger-zones-terminate-and-restart-your-instance)  
 {NOTE/}
 
@@ -196,7 +197,7 @@ allowed to connect your database instance.
 
 ### Manage features
 
-You can view features available for your product, enable, disable and configure them here.
+You can view features available for your product, enable, disable and configure them here.  
 
 {NOTE: Important }
 After enabling features some of them must be configured to work properly.
@@ -210,24 +211,34 @@ Available features are described on [Product Features](../cloud-features) page.
 
 ---
 
+### Nodes: Additional product nodes
+
+You can expand your cluster by adding *more product nodes* to your cluster. This helps improve *High Availability* and *task/load balancing*.
+
+!["Figure 19 - Nodes: Manage additional nodes"](images/portal-product-nodes-additional-nodes.png "Figure 19 - Nodes: Manage additional nodes")
+
+More details can be found [here](../cloud-scaling#additional-product-nodes---general).
+
+---
+
 ### Maintenance and Danger Zones: Terminate and Restart your Instance
 You can restart your product nodes, deploy additional tools and terminate your product here.
 
-!["Figure 19 - Manage Product: Maintenance and Termination"](images\portal-product-details-maintenance-and-termination.png "Figure 19 - Manage Product: Terminate")
+!["Figure 20 - Manage Product: Maintenance and Termination"](images\portal-product-details-maintenance-and-termination.png "Figure 20 - Manage Product: Terminate")
 
 ---
 
 * **Maintenance Zone**  
   Use this tab to restart selected node and deploy RavenDB tools.
 
-!["Figure 20 - Manage Product: Storage"](images\portal-product-details-maintenance-zone.png "Figure 20 - Manage Product: Maintenance Zone")
+!["Figure 21 - Manage Product: Storage"](images\portal-product-details-maintenance-zone.png "Figure 21 - Manage Product: Maintenance Zone")
 
 ---
 
 * **Danger Zone**  
   Use this tab's **Terminate** button to eliminate your cluster.
 
-!["Figure 21 - Manage Product: Terminate"](images\portal-product-details-terminate-product.png "Figure 21 - Manage Product: Danger Zone")
+!["Figure 22 - Manage Product: Terminate"](images\portal-product-details-terminate-product.png "Figure 22 - Manage Product: Danger Zone")
 
   {DANGER: }
   Terminating your instance is **irreversible**. Your data and cluster properties will be permanently lost.