Selenium grid nodes system requirements

[Octavian Covalschi]

Hi, 

I'm trying to figure out what system requirements (CPU, RAM, etc...) would be appropriate for a small selenium grid cluster(a few dozens of nodes). I understand it depends on how many instances each node would have, that's why we were thinking to start with 10-20 instances per node with FF only.

We'd like to avoid any cloud solution at this point, that's why figuring this out is important for us.

Can anyone share any numbers so we could have a starting point? I mean if I have a generic quad core, 8GB RAM dedicated server, would this be enough to run 10 or 50 instances that are being kept busy pretty much all the time? 

Thank you in advance.

[Mike Riley]

I wish I could tell you what we used at my last job, but IT set that up.  All I know is that the one server had four VMWare VMs on it that we used (2 XP, 1 Vista, and 1 Win 7 64-bit).  It might have had other VMs on it too, but for Selenium it seemed to run quite well.  I don't believe it was really any slower than if I was running it on my desktop.

I don't use Selenium (yet) on my home system, but with Virtual Box I often have four VMs along with my native OS and it seems to me as if they all run fairly full speed.  I had 2 dual core AMD chips running @ 2.8Ghz with 32GB of RAM.  I typically only give a VM a single core and anywhere from 2 to 8GB of RAM, depending on how I use it.

I think you will find that as long as your VMs don't use up all available RAM and you don't have any more VM cores than you have physical cores you will get very good performance out of a system.

Mike

[Octavian Covalschi]

Thank you. I guess the best way is just to setup a test environment and start testing...

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