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IP differentiation among VMs
Is it possible to have the below configuration in a physical machine??
-- 4 Virtual Machines -Controller1, Injector1, Injector2 & Injector3
Is Yes, then how would we diffrentiate between Controller & Injectors 1, 2 & 3 in terms of their IP?
If No, what could be the reason?
P.S: I have come across several blogs saying LG in a virtual server is a bad option, but still was curious to know answer to the question above.
Re: IP differentiation among VMs
The answer is self evident....a host is a host is a host is a host...whether running in a VM or a physical machine. Hosts are uniquely identified by an IP address, which no two hosts may share.
There is precisely zero benefit to placing multiple virtual machines on a single host where you can load the same number of virtual users hosted in the host OS instead of multiple guests. You are adding a number of uncontrolled factors into your test bed ... deliberately. Bad practice all around.
Where VM's are being pushed hard is where organizations do not have/want dedicated load generators. Instead management wants to spin up a Guest VM Load Generator in an existing Virtual Machine solution which already has potentially a dozen or more virtual machines running on it....all uncontrolled influences on your test.
It is simply a bad practice in testing to include known uncontrolled influences in your test design. It does not matter if you are testing a toothpick, a fuel injection system or client-server software.
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