Creating clusters in vsphere client 6.5
Right click the Cluster > Edit Settings.
To create an affinity rule in vCenter, see the below steps: The VMware doc for VM-Host Affinity Rules, describes adding a host affinity must rule. With newer versions allowing host affinity rules to be set that define where VMs can or cannot (anti-affinity) run. However, this behavior was addressed beginning in vSphere 6.5. Depending on the version of vSphere, VMware HA does not respect affinity rules when restarting a VM due to hardware failure. It is recommended to set host affinity “Must” rules for VMs that need to stay on certain hosts for licensing purposes. For licensing reasons, it may be desirable to set a “Must” rule. I believe the reason VMware uses the word “efficiency” over performance is because DRS is not looking at all performance metrics for example, I/O throughput is not a metric for which DRS gathers data.Ī quick word on DRS Affinity Rules. DRS now uses a score to determine the performance efficiency of the virtual machine. Now, if DRS can provide better performance to a VM on another ESXi host, it will move it or make a recommendation for it to be moved.
With vSphere 7, DRS evaluates virtual machine performance instead of the cluster, and also has more granular checks, looking at metrics like CPU Ready Time and memory ballooning. It would review ESXi hosts for high memory and CPU usage and attempt to balance the cluster more equally. Prior versions of DRS balanced at the vSphere cluster level. VSphere 7 DRS logic has changed most significantly in regard to the balancing approach. Rather set it to partially automated, which allows VMware to recommend a location for the guest, but does not attempt to move it automatically. Therefore, we do not recommend enabling fully automated DRS. Instead, human intervention is preferred for planning and monitoring VMs, as well as determining the location of business-critical database workloads. Due to the variable nature of database workloads, it is generally not desirable to allow vSphere DRS to relocate production databases at will.
Creating clusters in vsphere client 6.5 manual#
It can be set to automatically move VMs based off of its algorithms, or be set to manual and give recommendations for manually moving VMs. The purpose of DRS is to balance CPU and memory across clusters. VMware DRS is a feature used for balancing resources of virtual machines across ESXi hosts in a cluster. In future blogs, we will look at other new features and enhancements. In part one, we will review enhancements and changes made to Distributed Resource Scheduling (DRS). In this blog series, we will discuss elements of the release of vSphere 7, which was released earlier this year in May.