VMware vCenter Multi-Hypervisor Manager

VMware vCenter Multi-Hypervisor Manager (MHM) is a vCenter component that provides an integrated platform for managing VMware and third-party hypervisors from a single interface.

The list of supported hypervisors can be summarized as below:

1. Microsoft Hyper-V Server 2012
2. Microsoft Hyper-V for Windows Server 2012
3. Microsoft Hyper-V Server 2008 R2
4. Microsoft Hyper-V for Windows Server 2008 R2
5. Microsoft Hyper-V for Windows Server 2008

MHM supports heterogeneous hypervisors in VMware vCenter Server and it let administrators to choose which hypervisor meets a specific business unit’s needs within an organization. When a third-party host is added to vCenter Server, all virtual machines (VMs)  that exist on the host are discovered automatically and added to the third-party hosts inventory. Administrators can modify permissions, adjust server configurations, provision new VMs, migrate VMs from Hyper-V to ESXi and power hosts off and on.

Operations Supported by MHM:

• Manage Hyper-V hosts and virtual machines (VMs) from vCenter.

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over commitment in its simplest term means allocating more resources to virtual workloads then what is available at physical level. Most common resources that are over committed are memory and cpu.

A simple example of over commitment can be running 3 VM each with 4 GB RAM on an Esxi host which has only 8 GB RAM. In this case we have allocated 12 GB RAM to all VM’s collectively but at physical level (Esxi host) we have only 8 GB RAM available.

It is a general belief by most novice VMware admins that allocating more resources to virtual machines means better performance. When I started working with VMware I also used to think in the same way.

It was the vSphere Optimize and Scale training, where I learned this is not true and how over commitment can badly affect VM performance.

In this post I am trying to demonstrate the negative affects of CPU over commitment.… Read More