Roles in Windows Azure
Roles are an important
concept in Windows Azure and learning them is the base for further
programming. There are mainly 3 roles in
- Web Role
- Worker Role
- VM Role
It provides a web front
end solution. This is similar to an
ASP.NET application. While under hosting
the Azure provides IIS and required services.
It provides a background
service solution. This can be thought as
a windows service application. We can
use this role to run background operations like database management tasks,
report generation etc. It can run
According to msdn, the Web
Role can be considered as a Worker role loaded with IIS. Similarly the worker role can be used to host
other application platforms.
VM Role (Virtual
The Web Role and Worker
Role are executed on virtual machines.
The Virtual Machine Roles provides the user to customize the virtual
machine on which the web and worker roles are running. The VM role runs a virtual hard disk (VHD)
image which can be created and uploaded by the user. Through the VM role the customers can run
scheduled tasks and other windows services.
From the above we can
summarize that a Windows Azure application will be containing web roles, worker
roles and vm roles.
The case of application is
similar to our ordinary solutions where a project include
- Web Application in ASP.NET
- Background Services in Windows Services