Hi as900w, The total resource requirements for the powered-on virtual machines is comprised of two components, CPU and memory. The total host resources available for virtual machines is calcu...
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Hi as900w, The total resource requirements for the powered-on virtual machines is comprised of two components, CPU and memory. The total host resources available for virtual machines is calculated by adding the hosts' CPU and memory resources. The Current CPU Failover Capacity is computed by subtracting the total CPU resource requirements from the total host CPU resources and dividing the result by the total host CPU resources. The Current Memory Failover Capacity is calculated similarly. Example: The cluster is comprised of four hosts, each with a different amount of available CPU and memory resources. The first host has 8Ghz of available CPU resources and 24 GB of available memory, while Host 2 + 3 have 10Ghz of available CPU resources and 16GB of memory. Host 4 has 7Ghz of CPU resources and 12GB of available memory. There are 4 powered-on virtual machine in the cluster with differing CPU and memory requirements. VM1 need 2Ghz of CPU resources and 4GB of memory, while VM2 needs 3Ghz and 2GB, VM3 needs 1Ghz and 1GB, VM4 needs 3Ghz and 6GB. The Configured Failover Capacity for CPU and Memory are both set to 25%. The total resource requirements for the powered-on virtual machines is 9GHz and 13GB. The total host resources available for virtual machines is 35GHz and 68GB. Based on this, the Current CPU Failover Capacity is 74% ((35GHz - 9GHz)/35GHz). Similarly, the Current Memory Failover Capacity is 80% ((68GB-13GB)/68GB). Because the cluster's Configured Failover Capacity is set to 25%, 49% of the cluster's total CPU resources and 55% of the cluster's memory resources are still available to power on additional virtual machines. Rick