Upgrade from 4.2.5 to 5.1

Hello.

I have a version of Zenoss Core 4.2.5 up and running with 1 GB of memory and 1 CPU. I am monitoring about 100 devices. Right now, we are trying to Upgrade our Zenoss deploy to the 5.1 version. Since our IT infrastructure has been changed in last couple of years and the Zenoss has not been properly configured to show those changes, we are deploying a new and clean machine with the newer Zenoss 5. I already Ive installed the CentOS7.

At this moment, after reading your planning, installation and configuration guides, I have a big problem and I would like to have some thoughts of yours. Basically, I have a machine with the following resources:

4 GB of RAM;

4 CPUs;

55 GB of disk space.

Your planning guide refers that it would be necessary at least 20 GB of RAM for the Control Center and the Zenoss Core 5. Without that amount of RAM, the Zenoss 5 not even starts. So, I would like to know, if it is possible to use Zenoss 5 with the resources that Ive allocated to my CentOS machine It is absolute necessary to install the Control Center to have the Zenoss 5 running What are your recommendations for the scenario that I described

Regards,

Csar Santos