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N+1 in mixed cluster

  • 17 March 2017
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If I add one additional node with 512 GB ram to my existing cluster which consisit of 3 nodes of 256 GB each, how N+1 will be calculated?
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Best answer by patrbng 17 March 2017, 21:11

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vsphere or AHV?
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AHV
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From aluciani earlier post
http://next.nutanix.com/t5/Nutanix-Connect-Blog/Episode-1-Acropolis-Hypervisor-VM-HA-Part-2/ba-p/5597

When all the nodes in a Nutanix cluster have the same amount of memory, “Reserved Host” policy leads to least overhead for failover capacity in most cases and will be preferred. When some nodes in a cluster have more memory than others, depending on the sizes of the VMs enabled for VM-HA “Reserved Segments” policy may lead to lower overhead and is preferred.