DRS

Testing vSphere 6.5 DRS – CPU Over Commitment Ratio

November 17, 2016 Kim Bottu 2

The CPU over-commitment ratio also known as the vCPU to pCPU ratio. In this post I will test this new feature of vSphere 6.5 and how it impacts a vSphere 6.5 datacenter design. I am testing this because some of the information about this setting is kind of vague and I want to be sure that I understand how it works and what its impact is on production environments and how it will affect vSphere designs. To be able to test the above mentioned features I have setup a small test environment using 2 nested ESXi hosts, a nested VCSA 6.5 server and a handful of VM’s. The Cluster: 2 hosts HA is disabled DRS is enabled ( because this is a DRS feature!) The hosts: Both hosts have the […]

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vSphere Hosts: Scale Up vs. Scale Out

March 10, 2015 Shady ElMalatawey 0

Another confusing debate is around the approach you take when choosing your vSphere Hosts hardware configuration.  Two approaches there: Scale Up (Vertical Scaling) and Scale Out (Horizontal Scaling). Scale Up is to get small number of large powerful servers and that why it’s called Vertical Scaling; because you scale the configuration up to the max. with small number of servers. Scale out is to get a lot of small less powerful servers to achieve same required configuration and it’s called Horizontal Scaling; because you scale the number of servers horizontally, each with low hardware configuration. The common misconception of these two approaches is that people thinks that Scale-out approach indicates using Blades and Scale-up approach indicates using Rack-mounted servers. A fully populated, powerful blade chassis […]