Virtualization Concept - Process Automation System
What is Virtualization
The shift from a traditional PC/server approach to a virtualized system i.e. emulation of hardware, operating systems, data storage and networks which is primarily derived from IT world mainly to optimize administration, space and service by centralizing the resources such as CPU, memory and storage space and ultimately to take advantage in cost savings. However virtualization is recognized its presence in the field of process automation with increasing infrastructure and computerized resources required for process control system at Level-3
Why Virtualization - Pros & Cons Viewpoints:
There are different viewpoints and debate for introducing virtualization for PAS in process industries especially for larger and mega infrastructure. Few of them are highlighted below:
Cost and Energy Reduction: While go ahead along with virtualization there will be reduction in total hardware as a part of IT infrastructure required for servers / storage for PAS applications. That means simply get access to the same type of software and servers / storage through the use of virtualization and taking advantage of running multiple application on a single physical machine. Obviously if hardware is reducing then there will be reduction in power consumed, space requirement for infrastructure set-up, cooling requirement @ dissipated heat. Another viewpoint tis less hardware means less maintenance.
Increased Efficiency and Availability: Upgradation and deployment of new machines are quite easier because of playing virtually. Normally each virtual system have its own dedicated IP address and will appear to other systems like any other separate computer in the network instead of deploying new physical machine in reality. System administration gets simplified and centralized.
Stumbling block of Virtualization: Even though virtualization advocates many advantages in terms of cost saving, efficiency and other life-cycle benefits, however concept and engineering part is very crucial stage while choosing for PAS virtualization.
Estimating hardware and other resource requirements are very crucial for success of implementing virtualization which will affect adversely if not done correctly. Calculation of processing power, storage, and system memory it’s equally important requirement including sufficient spare capacity consideration.
Another concern is central virtual server; if the virtualized server go offline, every applications that the server was hosting would also fail which is not affordable @ end-users.
There are still vendors not fully supporting virtualized environments for certain specific applications. Hence as an end user one question remain in my mind whether Virtualization is limited to legacy control system OR it can be implemented as a whole for integrated PAS including various third part interfaces.
Well this is my understanding and thought regarding virtualization concept for PAS. If you also like this topic then please like and share your views/experiences about Virtualization concept in PAS.
