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So just one of the little curiosity questions that come up every once in a while...
mdrv -- does it serve a practical purpose?
I'm assuming the number of threads on mdrv is unlimited.
1. What version of LoadRunner (LR) or PerformanceCenter (PC) are you using? (specify which LR or PC)
2. What is the protocol you are recording?
3. If HTML - are you using HTML-Advanced with URLs or,
4. URL mode with Concurrent groups, or
5. URL mode without Concurrent groups?
6. Which LoadRunner/PerformanceCenter feature or service packs are you using?
7. What kind of LoadRunner license do you have - Subscription, Perpetual, Virtual User days, or Evaluation? Perpetual
8. If subscription, is subscription current or expired?
9. What platform(s) and Operating Systems? Include version and service packs.
10. If you have filed a service request with HP/Mercury, what have they told you at this point with respect to your issue?
mrdv can be very useful. The number of threads is process management black magic to me in that I no longer have knowledge of the thread spawning algorithm. I believe it used to be confined to 50 threads per process?? Anyway, the idea is that threads share process resources as opposed to have a full process per VU.
At a minimum, you could create an icon (desktop or elsewhere) to launch a specific script without having to launch VuGen via normal means and more!
Open a dos/cmd window and type mdrv. If not found, cd to the vugen bin and type mdrv.
I liken mdrv akin to the engine of a car. In the case of LoadRunner (and business availabilityh center for that matter), vugen and the controller are but high level interfaces to MDRV, which is actually charged with the work and the collection of data.
Why become familiar with the command line interfaces. Well, often I don't install VUGEN on load generators. With MDRV I can test out a script and see if it is working from a generator independent of being scheduled from the controller as a part of diagnostics.
I can also sanity check for a couple of threads, each representing a user, to ensure I don't have any nasty locking issues when just a couple of users are running as a part of script qa.
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