{"id":1037,"date":"2022-09-28T12:40:26","date_gmt":"2022-09-28T11:40:26","guid":{"rendered":"https:\/\/thomas-kopton.de\/vblog\/?p=1037"},"modified":"2022-09-28T12:54:29","modified_gmt":"2022-09-28T11:54:29","slug":"how-vrealize-operations-helps-size-new-vsphere-clusters","status":"publish","type":"post","link":"https:\/\/thomas-kopton.de\/vblog\/?p=1037","title":{"rendered":"How vRealize Operations helps size new vSphere Clusters"},"content":{"rendered":"\n

In ESXi Cluster (non-HCI) Rightsizing using vRealize Operations<\/a> I have described how to use vRealize Operations<\/mark> and the numbers calculated by the Capacity Engine to estimate the number of ESXi hosts which might be moved to other clusters or decommissioned. The corresponding dashboard is available via VMware Code<\/a>.<\/p>\n\n\n\n

In this post, I describe the opposite scenario.<\/p>\n\n\n\n

Problem Statement<\/h5>\n\n\n\n

The question I will answer is: “How can I use vRealize Operations to help me size new vSphere clusters using completely new ESXi hosts I plan to purchase?<\/mark><\/em>“<\/p>\n\n\n\n

With its Capacity Engine <\/strong>and the “What-If Analysis<\/strong>” scenarios, vRealize Operations provides powerful features to help with infrastructure and workload planning. In case you are not familiar with “What-If”, the following picture shows the supported scenarios.<\/p>\n\n\n\n

\"\"<\/a>
Figure 01: vRealize Operations “What-If Analysis” supported scenarios.<\/em><\/figcaption><\/figure>\n\n\n\n

What we are missing here is a scenario covering local workload (Virtual Machines) migrations from existing vSphere clusters to new planned and not yet existing clusters. Usually, you know what kind of compute hardware you are planning to buy or at least what choices you have, what you do not know is how many of them you need to run any specific workloads.<\/p>\n\n\n\n

Solution<\/h4>\n\n\n\n

NOTE<\/mark><\/strong>: I am using the demand<\/mark><\/strong> model in this use case. The allocation<\/mark><\/strong> model would be similar to implement.<\/p>\n\n\n\n

Using vROps and knowing what type of hardware will be used, we have everything we need to estimate the number of hosts required to migrate all workloads from an “old” vSphere Cluster.<\/p>\n\n\n\n

These are the ingredients:<\/p>\n\n\n\n