Calculate Sampling Rate

Products

• CA Security Command Center
• CA Data Protection (DataMinder)
• CA User Activity Reporting

Issue/Introduction

Can you please help me calculate the Sampling Rate. I need the number that I should use to Capture 25% The documentation provided to assist calculating is a bit confusing. CA Data Protection can use sampling so that only a subset of events that match the trigger criteria cause the trigger to fire. If you enter 1, every event matching the trigger criteria (that is, 100%) results in the trigger firing. If you enter 1.25, only 80% of all matching events results in the trigger firing. If you enter 1000, only 0.1% of all matching events results in the trigger firing.

Environment

Release:
Component: DLPSRV

Resolution

In 15.0 and higher we made improvements to random sampling.  You can specify the sampling rate so that only a subset of events that match the trigger criteria cause the trigger to fire. The sampled events percentage is calculated as the "Number of sampled events percentage = 100/Sampling Rate". 

As in the example:
100/1 = 100 percent
100/1.2 = 80 percent 
100/1000 = 0.1 percent 
100/20 = 5 percent

For 25 percent it should be 4
100/4 = 25