3-Tier Auto-scalable Web Application Architecture

"A web application or web app is any application software that runs in a web browser or is created in a browser-supported programming language (such as the combination of JavaScript, HTML and CSS) and relies on a common web browser to render the application. ... Applications are usually broken into logical chunks called "tiers", where every tier is assigned a role. ...
For more complex applications, a 3-tier solution may fall short, and it may be beneficial to use an n-tiered approach, where the greatest benefit is breaking the business logic, which resides on the application tier, into a more fine-grained model. Another benefit may be adding an integration tier that separates the data tier from the rest of tiers by providing an easy-to-use interface to access the data. For example, the client data would be accessed by calling a "list_ clients()" function instead of making an SQL query directly against the client table on the database. This allows the underlying database to be replaced without making any change to the other tiers." [Web application. Wikipedia]
The AWS architecture diagram example "3-Tier Auto-scalable Web Application Architecture" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the AWS Architecture Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.

The vector stencils library "AWS Application Services" contains 7 AWS application services icons: Amazon API Gateway icon, Amazon AppStream icon, Amazon Elastic Transcoder icons, Amazon SWF icons, AWS Step Functions icon.
Use it to draw Amazon Web Services architecture diagrams with ConceptDraw PRO diagramming and vector drawing software.
"Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale." [aws.amazon.com/ api-gateway/ ]
"Amazon AppStream enables you to stream your existing Windows applications from the cloud, reaching more users on more devices, without code modifications." [aws.amazon.com/ appstream/ ]
"Amazon CloudSearch is a managed service in the AWS Cloud that makes it simple and cost-effective to set up, manage, and scale a search solution for your website or application." [aws.amazon.com/ cloudsearch/ ]
"Amazon Elastic Transcoder is media transcoding in the cloud." [aws.amazon.com/ elastictranscoder/ ]
"Amazon Simple Email Service (Amazon SES) is a cost-effective email service built on the reliable and scalable infrastructure that Amazon.com developed to serve its own customer base." [aws.amazon.com/ ses/ ]
"Amazon Simple Queue Service (SQS) is a fast, reliable, scalable, fully managed message queuing service." [aws.amazon.com/ sqs/ ]
"Amazon Simple Workflow Service (SWF) ... helps developers build, run, and scale background jobs that have parallel or sequential steps." [aws.amazon.com/ swf/ ]
The AWS icons example "Design elements - AWS Application Services" is included in the AWS Architecture Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.

The vector stencils library "AWS Mobile Services and Game Development" contains 7 icons: AWS Cognito icon, AWS Mobile Analytics icon, Amazon SNS icons, AWS Device Farm icon, AWS Mobile Hub icon, Amazon GameLift icon.
Use it to draw Amazon Web Services architecture diagrams with ConceptDraw PRO diagramming and vector drawing software.
"AWS Mobile Hub lets you easily add and configure features for your mobile apps, including user authentication, data storage, backend logic, push notifications, content delivery, and analytics. After you build your app, AWS Mobile Hub gives you easy access to testing on real devices, as well as analytics dashboards to track usage of your app – all from a single, integrated console." [aws.amazon.com/ mobile/ ]
"Amazon Web Services offers a comprehensive suite of products and services for video game developers across every major platform: mobile, console, PC and online. From AAA console and PC games, to educational and serious games, AWS provides the back end servers and hosting services for your game studio." [aws.amazon.com/ gaming/ ]
The AWS icons example "Design elements - AWS Mobile Services and Game Development" is included in the AWS Architecture Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.

This example was designed on the base of the diagram from the "BYOD Guidance: BlackBerry Secure Work Space" on the website of the UK Communications Electronics Security Group (CESG).
"Secure Work Space (SWS) for iOS and Android is a containerisation, application-wrapping and secure connectivity option that delivers a higher level of control and security to iOS and Android devices, all managed through the BlackBerry Enterprise Service (BES) administration console.
Work space applications are secured and separated from personal applications and data. The work space applications include an integrated email, calendar, and contacts application, an enterprise-level secure browser, and a secure document viewing and editing application.
The work browser allows users to securely browse the organisation’s intranet and the Internet. If the device is lost or the employee leaves the organisation, you can chose to delete only corporate information or all information from the device.
...
Recommended network architecture
The walled garden architecture, shown below, aims to limit the impact of a compromise of an EUD and isolate high risk components from high value components where possible. The enterprise servers installed as part of SWS are high value resources that require suitable protection but are also high risk; they perform complex processing tasks that are more likely to contain exploitable vulnerabilities. These competing priorities make securely placing the servers into an existing network challenging, and organisations that wish to deviate from this architecture below should ensure they understand the risks of doing so."
[cesg.gov.uk/ guidance/ byod-guidance-blackberry-secure-work-space]
The cybersecurity diagram example "Recommended network architecture for BlackBerry SWS" was created using the ConceprDraw PRO software extended with the Network Security Diagrams solution from the Computer and Neworks area of ConceptDraw Solution Park.

This Azure cloud architecture pattern diagram template was created on the base of figure in the article "Health Endpoint Monitoring Pattern" from the Microsoft Developer Network (MSDN) website.
"Health Endpoint Monitoring Pattern.
Implement functional checks within an application that external tools can access through exposed endpoints at regular intervals. This pattern can help to verify that applications and services are performing correctly. ...
It is good practice—and often a business requirement—to monitor web applications, and middle-tier and shared services, to ensure that they are available and performing correctly. However, it is more difficult to monitor services running in the cloud than it is to monitor on-premises services. ...
Implement health monitoring by sending requests to an endpoint on the application. The application should perform the necessary checks, and return an indication of its status.
A health monitoring check typically combines two factors: the checks (if any) performed by the application or service in response to the request to the health verification endpoint, and analysis of the result by the tool or framework that is performing the health verification check. The response code indicates the status of the application and, optionally, any components or services it uses. The latency or response time check is performed by the monitoring tool or framework." [msdn.microsoft.com/ ru-RU/ library/ dn589789.aspx]
The Azure cloud system architecture diagram template "Health endpoint monitoring pattern" for the ConceptDraw PRO diagramming and vector drawing software is included in the Azure Architecture solutin from the Computer and Networks area of ConceptDraw Solution Park.