Skip to main content

Cloud Computing Vs SaaS, PaaS and IaaS

Lot of peoples have some confusions about what is Cloud? If so then what is SaaS?
I will discuss about this topic with information I have.


Basically Cloud Computing refers some computing operation over internet, it may be any kind of service. Under this we have different models according to industry requirements. They are,
  1. Software as a Service
  2. Platform as a Service
  3. Infrastructure as a Service
Software as a Service - SaaS:
 SaaS refers simply access to an software application via internet on our client browser or any kind. It may be any kind like hosted in own environment or hosted in third party environment. 
Its related directly to end users.
Ex. Gmail, Google Docs etc.

Platform as a Service - PaaS:
PaaS refers access to a platform that provides capabilities to develop and test software applications via internet.
Its related to developers and testers who creates the software application.
Ex. Force.com(by SalesForce.Com), Google App Engine, Windows Azure, etc.

Infrastructure as a Service - IaaS:
IaaS refers access to hardware like mail servers, web servers etc via internet.
Its related to IT persons(or Organizations) who is responsible to provide environment for developers and testers to make software application.
Ex. Amazon EC2, Database.com(by SalesForce.Com), RackSpace, etc.


Hope this article will give you some ideas !!!

Comments

Popular posts from this blog

Some good Resources / Blogs / Sites for Selenium Users

Here I have listed out some good blogs and sites by extensive selenium automation users. Hope these will help you a lot. http://automationtricks.blogspot.com  - by NirajKumar http://www.theautomatedtester.co.uk/ http://testerinyou.blogspot.com   - by Naga/Mathu http://seleniumready.blogspot.com  - by Farheen Khan http://seleniumdeal.blogspot.com/  - Amit Vibhuti http://seleniumexamples.com/blog Sauce Labs and BrowserMob are companies doing cloud and extensive selenium automation services, products, etc http://saucelabs.com/blog http://blog.browsermob.com http://testingbot.com/ Cedric Beust -  creator of the TestNG Java testing framework. http://beust.com/weblog/ http://blog.reallysimplethoughts.com/  - by Samit Badle, Created many Selenium IDE Plug-Ins Available Colud Testing: 1. SauceLabs 2. Soasta 3. BrowserMob 4. CloudTesting.com  etc. Selenium Testing Products: 1. Twist by ThoughtWorks 2.  TestMaker by  PushToTest 3. Element34 company providi

UFT - Take full page screenshot by scrolling the page

'######################################################################################## 'This is navigate through the full page and taking individual screenshot of visible area '######################################################################################## Function TakeScreenshot Dim intScrolls, intScroll, strScrollPos Set pgApp = Browser ( " " ) .Page ( " " ) intScrolls = Round ( pgApp . RunScript ( " document.documentElement.scrollHeight / (screen.height) " ) , 2 ) If intScrolls < 1 Then intScrolls = - 1 pgApp . RunScript " window.scrollTo(0, 0); " Wait 1 Browser ( " " ) .CaptureBitmap " C:\screenshot0.png " , True For intScroll = 0 To intScrolls If Environment . Value ( " Browser " ) = " CHROME " Then strScrollPos = " scrollY " Else strScrollPos = " document.documentElement.scrollTop " End If If p

Change IE Browser ZOOM settings

Lot of UI automation testers could have faced this problem as we could change the zoom settings while operating manually for our convenience and forgot to reset to 100%. But our QTP and some other related tools would operate the browser perfectly if browser zoom is 100%. So wee need to change the zoom before start to run the scripts. Its better to have a code snippet in our framework to change this zoom setting right? Here we go... 1. We can simply change the Registry values before Invoking IE Function  ChangeRegistry   Dim  objShell   Set  objShell =  CreateObject ( "WScript.Shell" )  objShell.RegWrite  "HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Zoom\ZoomFactor" ,  "100000" ,  "REG_DWORD"   Set  objShell =  Nothing End   Function This option is very useful. But in real time, lot of customers could have restricted write access to windows registry. So we can try other options. 2. Use IE COM object and Change