Even we have ran CloudStack for years,still not quite clear about how 'First 
Fit'  method exactly works ?


It's stated in http://docs.cloudstack.apache.org that if  select 'First Fit' 
method in 'Deployment Planner',  user shall 'places new VMs on the first host 
that is found having sufficient capacity to support the VM’s requirements.' 


The question is 


    1. in what order CloudStack checks hosts to find out who is  capable to 
host the new VM ?   
    2. Is there a method ACS can create the new VM on the host which has less 
resource utilizatoin, e.g CPU or memory ? That would be particularly useful to 
balance the host resource utilization among hosts within same cluster. 


Regards, 





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