What is Virtual User Days (VUDs)?

In this blog post, we are going to understand about HP LoadRunner licensing mechanism. There are different types of licensing types: Time limited, Permanent, and Virtual User Days.

To inject the load in AUT, you need a valid license installed in your system. However, to use HP VuGen and HP LoadRunner Analysis, it is not required to have a license key.

Permanent License

This type of license will be valid forever. If you planned for continuous performance testing, then this type of license would be useful. However, you may need to pay for the maintenance fee for the support, patches, and updates.

Community Bundle

HP LoadRunner 12 comes with community bundle which replacing instant-on license.

  • Bundle comes with 50 permanent Vusers.
  • Includes all the protocol except GUI (UFT), COM/DCOM, and all the protocols in the template bundle.

VUDs

This type of license will be issued based on limited capacity. The capacity can be measured by VUDs or Vusers Days.

What is VUDs?

Virtual User Days are the licensing mechanism that allows Virtual Users to be executed in an unlimited number of runs against a single AUT within a single 24-hour period of time.

If you have 1000 VUDs which begins at 05.00PM IST, if you use 250Vusers on the same day, then you will have 750Vusers remaining on the same day. These VUDs will have an expiration date. See below figure.

HP-LoadRunner License Utility
HP-LoadRunner License Utility

Scenario 1

We have 500 VUDs license for two days. When day 1 begins we utilize 100VUDs and at end of day 1 we used 400VUDs, so  for the day 2 we will have 500 VUDs.

Yes, that is correct.

Scenario 2

We have 500 VUDs license for two days. When day 1 begins we utilize 500VUDs and at start of day 2 we use 400VUDs, so  we will have 100VUDs remaining for the day 2.

Yes, that is correct.

Scenario 3

We have 500 VUDs license for two days. When day 1 begins we can utilize 1000VUDs.

No this is incorrect. You can use 500 VUDs on day 1 and 2 respectively.

Scenario 4

We have 500 VUDs license for two days. When day 1 begins we utilize 500VUDs and at start of day 2 haven’t utilize 500VUDs, so  we will have 500VUDs remaining for the next day.

No. You license will expire on day 3, whether you use it or not.

Happy Testing!

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