An Analytical Framework for Approximating the Downlink Transmit Power in Multi-Rate DS-CDMA Systems Framework for Call Admission Control Analysis in Multi-Rate DS-CDMA.

With strict admission control, the cluster will reach a point at which it will no longer start virtual machines. Figure 10.33 shows a cluster configured for two-node failover. A virtual machine with more than 3GB of memory reserved is powering on, and the resulting error is posted stating that insufficient resources are available to satisfy the configured HA level. Figure 10.33 Strict admission control imposes a limit at which no more virtual machines can be powered on because the HA level would be jeopardized. If the admission control setting of the cluster is changed from strict admission control to guaranteed admission control, then virtual machines will power on even in the event that the HA failover level is jeopardized. Figure 10.34 shows a cluster reconfigured to use guaranteed admission control. Figure 10.34 Guaranteed admission control reflects the idea that when failure occurs, availability is more important than resource fairness and balance. With that same cluster now configured with guaranteed admission control, the virtual machine with more than 3GB of memory can now successfully power on. In Figure 10.35, the virtual machine has successfully powered on despite the large memory use and lack of available unused resources to achieve the proper HA failover. Figure 10.35 Guaranteed admission control allows resource consumption beyond the levels required to maintain spare resources for use in the event of a server failure ...»