Question
I am running vSphere Client version 7.0.1 with VMware ESXi, 6.7.0. I’d like to know how Storage, RAM and CPU are taken away from resources from host. I want understand how to plan for future VMs and how do I know when I need to add more Host?
The detail environment about 3 ESXi host as below:
Host 1
- PowerEdge R340
- Intel(R) Xeon(R) E-2186G CPU @ 3.80GHz
- Logical Processors: 6
- NICs: 2
- VMs: 7
Host 2
- PowerEdge R330
- Intel(R) Xeon(R) E3-1220 v6 @ 3.00GHz
- Logical Processors: 4
- NICs: 2
- VMs: 4
Host 3
- PowerEdge R430
- Intel(R) Xeon(R) E5-2620 v3 @ 2.40GHz
- Logical Processors: 24
- NICs: 5
- VMs: 7
Answer
RAM and Storage is straightforward, as you allocate RAM/Storage (virtual machine disks) to virtual machines it will decrease from the host, the virtual machines are allocated. You are likely to run out of RAM and Storage for virtual machines before you run out of CPU, CPU resources are a little more difficult. You need to start looking at performance.
If you are using vSphere vCenter, you already have most of the performance monitoring tools such as performance management with vCenter Server.
If you want to consider VMware vRealize Operations (vROps) Management Suite which you can download and evaluate as a trial for 60 days from VMware, it will use ALL the data available from vCenter Server, and predict WHEN YOU need to purchase another host.
The reports are ideal for the MANAGEMENT or the PURCHASE/BUDGET holder because you can give them the reports, and it will state in how many days if you continue to deploy VMs as this rate and configuration you will run out of resources.
