A minor release from last week but I had to mention it as it’s my second favorite non-ESX product from VMware (after SRM). Basically they made some enhancements to how HA capacity is computed for Capacity IQ calculations. You can download the new version here. In addition, here’s the what’s new section from the release notes:
CapacityIQ 1.0.3 is a maintenance release that supports additional VMware High Availability (HA) settings.
CapacityIQ factors reserved capacity to meet VMware HA failover commitments. CapacityIQ uses the VMware HA settings to calculate CPU and memory capacity for clusters and datacenters. The VMware HA settings do not affect host and virtual machine capacity calculations.
CapacityIQ 1.0.2 uses the enabled status of VMware HA and number of host failures in the Admission Control Policy settings of the vSphere Client as factors for modeling and forecasting capacity. CapacityIQ 1.0.3 adds the percentage of cluster resources reserved as failover spare capacity and the dedicated failover host number as factors for capacity.
The following VMware HA settings are the factors that affect CapacityIQ calculations:
Enabled or disabled status of high availability.
CapacityIQ detects VMware HA settings to calculate CPU and memory capacity for clusters and datacenters. If you do not use a VMware HA cluster, CapacityIQ sums up the capacity of all hosts in the cluster.
Number of host failures that the cluster tolerates.
CapacityIQ detects the number of host failures that the cluster tolerates and excludes the hosts with the most CPU and memory capacity. For example, if a cluster has 10 hosts and you set the number of host failures to three, CapacityIQ detects which three out of the ten hosts have the most CPU and memory capacity and excludes those hosts in the calculation. The CapacityIQ calculations of VMware HA CPU capacity and VMware HA memory capacity occur separately and the hosts that CapacityIQ excludes might be different for the CPU and memory calculations.
Percentage of cluster resources reserved as failover spare capacity.
CapacityIQ sums up the capacity of all hosts and multiplies that value by
(1-<percentage_reserved_as_failover_spare_capacity>). For example, if a cluster with 20 hosts has a total of 100GHz, and 20 percent of hosts are set aside for failures, the calculation for the VMware HA CPU capacity of the cluster is 100 × (1-.2).
Dedicated failover host.
CapacityIQ excludes the capacity of a dedicated failover host and sums up the capacity of the rest of the hosts. For example, if a cluster has three hosts with 9GHz, 8GHz, and 6GHz, and the 9GHz host serves as a dedicated failover host, the calculation for the VMware HA CPU capacity of the cluster is 8GHz + 6 GHz.
This maintenance release does not include any additional enhancements beyond the support of VMware HA settings.
June 8th, 2010 at 11:12 pm
Good post. I think you meant to say “computed” instead of computer in the first paragraph.
I will have to take a look at it again to see how it compares to other products we have been looking at.
Thanks!