Another new feature of vSphere 4.1 is the DRS-Fault Tolerance integration. vSphere 4.1 allows DRS not only to perform initial placement of the Fault Tolerance (FT) virtual machines, but also migrate the primary and secondary virtual machine during DRS load balancing operations. In vSphere 4.0 DRS is disabled on the FT primary and secondary virtual [...]

vSphere 4.1 introduces DRS VM-Host Affinity rules and offer two types of rules, mandatory (must run on /must not run on) and preferential (should run on /should nor run on). When creating mandatory rules, all ESX hosts not contained in the specified ESX Host DRS Group are marked as “incompatible” hosts and DRS\VMotion tasks will [...]

vSphere 4.1 introduces a lot of new features and enhancements of the existing features, one of the hidden gems I believe is the DPM enable and disable scheduled tasks. The DPM “Change cluster power settings” schedule task allows the administrator to enable or disable DPM via an automated task. If the admin selects the option [...]

VMware vSphere 4.1 introduces a new affinity rule, called “Virtual Machines to Hosts” (VM-Host). This new rule is available in vSphere 4.1 DRS clusters in addition to the existing (anti) affinity rule, which is now called VM-VM affinity rule. The new VM-Host affinity rule provides the ability of placing a group of virtual machines [...]