![]() ![]() One of the main objectives of the VMCA is getting real hosts free from VMs. The result is a compression of the existing free resources and an increase of the density of VMs per real host. The Virtual Machine Consolidation Agent (VMCA) inspects your private Cloud deployment to try to defragment the available resources by migrating VMs from some real hosts to other real hosts that have enough resources to keep all the VMs running. In case that these VMs were hosted in other hosts, some of the virtualization hosts may be powered off to save energy. ![]() That means that we are probably keeping powered on some real hosts because they are running VMs. On the other hand, when the fragmentation of resources happens, another consequence is an inefficient usage of the virtualization resources. Such fragmentation may have critical effects if a new VM should be started but there are not enough continous resources to be allocated, while there exist fragmented resources. The consequence is that is get a fragmentation of the resources of the virtualization hosts. The problem here is that due to these movements, we can find that the remaining VMs at a moment are spreaded among the real hosts resulting in a low density of VM per real host. When these VMs are no longer needed, they are destroyed and their resources are freed. During the lifecycle of a private Cloud deployment, the Virtual Machines (VM) are placed in real virtualization hosts. ![]()
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