How to reduce the cost of your VMware infrastructure

Since the start of virtualisation as we know it, two CPU sockets configurations were the obvious choice since it allowed to increase density and run more VMs on a single server, saving in the meantime money on the other components such as RAID controllers, network cads/HBAs, chassis, disks, you name... [Read More]

Don't bother with IPs, ping VMs

One thing that we all do quite regularly is pinging servers. In a medium/big environment there can be a lot of VMs and I can’t remember all the IP addresses or even the hostnames, which is annoying when I want to ping one of them. It’s still easy to find... [Read More]

How Power management impacts ESXi performance

Recently at work we’ve been noticing erratic performance on VMs eventhough the host’s CPU wasn’t running particularly hot. In order to check if there was contention I looked at the DRS chart and discovered that the CPU, not even hitting the 50% bar was not delivering half the resources. The... [Read More]

PowerCLI 6.5 broke my Powershell custom prompt!

This blog post applies only if you have a customized Powershell prompt. Function Prompt { … } in Microsoft.PowerShell_profile.ps1 EDIT 03/03/2018 The new version of PowerCLI support module auto loading so you don’t need to worry about importing the modules anymore. My Powershell profile... [Read More]

vSphere 6 host randomly disconnects from vCenter

I got a few email alerts recently from my vCenter regarding host not responding and disconnect at a random time. At first I tried to find a pattern for what could be potentially causing the issue and quickly realized that nothing funny was happening in vSphere-land. So I had a... [Read More]

Convert LUN canonical name to datastore and vice versa

Someone recently asked in a VMTN post for a way to know what datastore is associated with a LUN canonical name (naa.xxxxxx). It can actually be quite annoying to find which datastore we are talking about when all we have is a canonical name. It’s either putting on the... [Read More]

Snapshot consolidation: vsphere 5 vs vSphere 6

Prior to vSphere 6 the consolidation mecanism worked such a way that it could lead to issues where the consolidation of snapshots would fail and retry over and over again and could lead to crazy long stun times with unresponsive guest OS or a snapshot that doesn’t want to go... [Read More]

vExpert 2016 program

A couple weeks ago VMware sent over the emails to notify the new and returning vExperts 2016, and it is with great pleasure that I received mine! The vExpert program is an “award” given to the professionals who get involved in the VMware community by sharing... [Read More]

Hyperion + Lightberry + OpenElec + Kodi

I did this project to create a mood lighting behind the TV that “follows” the colors displayed on the screen and enhance the experience of movie watching. It is pretty much an open source version of Philips’ Ambilight except it can work on a wide range of devices and is... [Read More]

Move VLAN to a different vSwitch

Recently after we had a network change aimed to consolidate our uplinks, I had to move a whole bunch of VMs to a port-group in a different vSwitch but in the same VLAN without losing connectivity. It is a very easy process and not a single ping is lost (maybe... [Read More]