vThinkBeyondVM
VMware Employee
VMware Employee

Answer to your first query on linux vCenter :

vCenter Server Appliance: Linux VC capability

Hosts (with embedded vPostgres database) 100

Virtual machines (with embedded vPostgres database) 3000

Hosts (with Oracle database) 1000

Virtual machines (with Oracle database) 10000

Ref:http://www.vmware.com/pdf/vsphere5/r55/vsphere-55-configuration-maximums.pdf

If you install new vCenter from scratch ie. 5.x. you can add your ESXi 4.1 host to it but you will lose all vCenter settings/configuration from earlier vCenter.

You need to configure everything from scratch on new VC


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Thanks & Regards
Vikas, VCP70, MCTS on AD, SCJP6.0, VCF, vSphere with Tanzu specialist.
https://vThinkBeyondVM.com/about
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