VMware are clear about the importance of setting admission control on vSphere clusters, and the preference of using the percentage calculation where possible A simple formula will help calculate for heterogeneous cluster* For example I Read More …
Bandwidth control methods are changed in vsphere 6 distributed virtual switches with NIOC 3 System Traffic, Network Resource Pools, Network Shares, Reservations and Limits, Traffic Filtering and Marking, QaS, Cos Tagging, DCSP Tagging, Network Traffic Read More …
Trying to keep track of what you have read in preparing for the advanced level design exam is a task in itself. I’ve created a downloadable excel file that contains objectives and hyperlinks as per Read More …
In the previous posts I wrote about virtual machine cpu limits not being exposed to the guest OS. This presents concerns for systems and application admins when investigating performance related issues The example vm has a Read More …
Application issues, undersizing a virtual machine, or applying a restrictive cpu limit can all result in cpu ready CPU Ready is the primary indicator of a cpu performance issue. Although it’s possible to create a cpu-ready alarm, every VMware Read More …
High cpu ready values are probably the single most recognised sign that a virtual machine is having problems, whether due to application issues, or cpu undersizing, the vSphere admin should know about it. Setting an alarm Read More …
virtual machine cpu limit considerations Several years ago some of VMware’s most respected technical experts made recommendations against using virtual machine cpu limits. So why does this feature exist, is it a viable method to Read More …