The most interference between browser users

Use and application of the eValid server loading (LoadTest) capability. And in the cloud computing context for monitoring and loading.

The most interference between browser users

Postby becau » Tue Jul 19, 2011 3:50 pm

In your experience, what kind of tests cause the most interference between browser users?
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Re: The most interference between browser users

Postby eValid » Tue Jul 26, 2011 3:49 pm

becau wrote:In your experience, what kind of tests cause the most interference between browser users?
Here is the scenario: You have multiple eValid Browser Users (BUs) running, and you want to know, what kinds of process to process interactions cause problems.

The quick answer is: None.

That's because two (or more) eValid BUs are completely independent processes on the Windows Desktop, and if the test scripts they are running are "load test safe" or "desktop safe" then they will run with no interaction at all.

But the answer is actually a bit more complex, because on any Windows machine there are two "unitary resources" that have to be shared among all processes, and that includes betwee two (or more) eValid BUs. Those two resources are (a) the Cache and (b) the Desktop.

eValid LoadTest runs -- when you are running multiple eValid BUs -- avoid problems with the cache by the simple expedient of having all of the parallel BUs never use the cache at all. If they don't use the cache, there'll be no interference.

Contention on the Desktop is more difficult to deal with, and for that reason when a test script requires use of the desktop we say it is "load test unsafe" and don't recommend it be put into a LoadTest run. But if you do need to run parallel BUs that require the desktop, eValid provides a Lock/Unlock command set that lets you time-partition the desktop reliably.

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