What is a parallel database and explain how it works?

Importance of Parallel Testing

Following are the benefits of adopting parallel testing as your primary testing approach −

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  Extend your test coverage − Parallel testing allows you to run a wider scale test compatibility within a short duration. For instance, if you want the 'order placing' function of an application, you can run it on different OS, browser, versions, etc., in just one go. Unlike sequential testing, you don't have to run a test repeatedly.
  
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  Reduces your test duration − You can test unlimited concurrent tests in parallel testing simultaneously. While in sequential testing, you can run only one test at a time. In short, the time takes to run hundred test modules (assuming) will be equal to the time taken to execute one in sequential test. It goes without saying, you will be able to complete the project way faster than ever.
  
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  Reduces your cost − Since parallel testing runs on the cloud, it will cost you significantly less than sequential testing. As, in the latter, you have to pay for developing, maintaining, and upgrading the test environment, ending up paying a fortune.
  
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  Enhances continuous integration and delivery − To establish continuous integration and delivery is a process you need to keep the functional tests frequently running at a rapid pace. Since you can run these tests in parallel, it will give you enough time to prepare quality test data. You can send detailed reports to the respective teams to work on the issues faster and better.
  
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  Continuous Testing − Implementing a continuous testing process in sequential testing is impossible since continuous testing requires a faster test cycle. Instead of physical hardware and systems, parallel testing runs on cloud technology and virtualization. It allows you to perform large-scale tests faster and release them in the market as earliest as possible.
  

Preparing a Parallel Test Case

It's best to develop individual projects for browser compatibility that includes testing various web application functionalities. It should be followed by creating a master project to test those different projects.
Parallel testing is divided into two-level criteria- Entry-level and Exit Level.
In the entry-level criteria, you need to define specific tasks and ensure their quality before introducing them in the parallel test process.

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  Make sure to prepare the proper testing environment
  
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  Defines all pre-conditions and scenarios before executing the test
  
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  Kindly ensure new data and legacy data are properly migrated
  

The exit level criteria define the steps to perform parallel testing perfectly.

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  Starts by running old system against new systems
  
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  Know how both systems are different from each other
  
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  Use the same input to run it through a complete testing cycle
  
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  Measure the output of the newly developed system to the old one
  
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  Report bugs to the concerned team