LPAR2RRD collects performance data and generates actual, historical and future trends utilization graphs of your virtual environment.
It is agentless (it receives everything from the management stations like vCenter or HMC).
The product supports IBM Power Systems™ and VMware virtualization platforms.
Collected data set can be extended about data provided by the OS Agents or NMON files.
It is free for use. You do not need to invest into expensive commercial solutions. You can optionally buy support.
It does not require ANY administration in compare to other commercial tools where you need to have dedicated and trained staff for administration of them