No need to deploy another OVA. Have your VM guy take a snapshot of that VM so you can easily roll it back in case the upgrade go sour.
Download the rpm package for IIQ 3.0 from here https://support.emc.com/downloads/15208_Isilon-InsightIQ
SCP that package to the appliance, login to the appliance and start the upgrade
sudo yum upgrade isilon-insightiq-3.0.0.0036-1.x86_64.rpm (or whatever the package name is, looks like 3.0.1 is out)
I would add that you need free space in your /datastore (local or otherwise) as the upgrade from 2.5.2 to 3.0 will upgrade the data tables as well.
But it is in-place!
You will need to go to 3.0 before going to 3.0.1, but it too is an rpm that can be used to upgrade both VMs and stand alone installations of InsightIQ.
I cant get out of our network and it appears that we need to get some additional files for the installation. Does anyone know what additional files in addition to the insight3.0 rpm file that is needed for a successful installation?
Worked perfectly for IIQ 3.01 vApp upgrade to 3.1.
3.1 has higher requirements for CPU and Memory, changed to 4 Core/16GB
The FSA data is kept on the cluster itself; it is upgraded and retained.
You will need to go to 3.0 before going to 3.0.1.