VRAdvisor uses a sample of data for analysis; the sample of data must be available in an appropriate format required by VRAdvisor. To collect a sample of data that represent the application write rate, we recommend that you collect the sample of data for a period of seven to fourteen days. Make sure that the collection period includes times of peak usage for your application, so that the collected data reflects your environment.

In the data collection mode, VRAdvisor collects the sample of data in the appropriate format required by VRAdvisor. You can also collect the sample of data using the data collection script provided. The data collection script uses the appropriate command at the operating system level to collect the data, and also converts the data to the appropriate format required by VRAdvisor.