Sam McGeown

Sam is an experienced senior consultant who specializes in network virtualization.  His technical experience includes design, development and implementation of cloud solutions, network function virtualisation and the software defined datacentre. Sam specialises in automation of network virtualisation for cloud infrastructure, enabling public cloud solutions for service providers and private or hybrid cloud solutions for the enterprise.

Sam is currently working for VMware

VCDX-CMA,  vExpert 2013-2019, vExpert NSX, vExpert VSAN, vExpert Cloud

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Articles

Written by Sam McGeown on 17/7/2017
Published under Career and Community
I’ve been working for Xtravirt for over 3 and a half years now, first as a Senior Consultant, and more recently as a Lead Consultant. During that time I’ve had the opportunity to work with some excellent people, some fantastic customers and some huge projects. I’ve developed and grown as a consultant and architect, achieved multiple VCP and VCAP qualifications, and VMware’s elite VCDX certification. For all of this, and for the opportunities and support they have provided, I am thankful to Xtravirt and to all of my colleagues who helped along the way.
Written by Sam McGeown on 3/7/2017
Published under Community, VMware and vSphere
The Host Resources Deep Dive book by Frank Denneman and Niels Hagoort has been one of the most widely anticipated books in the VMware community - previous deep dive books by Frank (co-authored with Duncan Epping), tantalising blog posts and captivating presentations have whet the appetite for the last year or so. Having sat through some of these presentations at VMUGs and VMworld I can tell you the depth and understanding that the authors bring to the table is immense.
Written by Sam McGeown on 30/6/2017
Published under PowerCLI, VMware and vSphere
With the release of vSphere 6.5, VMware upped the game for vCenter High Availability (vCHA) and introduced an active/passive/witness cluster setup to provide a failover cluster for vCenter Server Appliances. The diagram below shows the architecture of the solution. Deploying vCHA can be done in two modes - “Basic” and “Advanced”. You can use Basic mode if the vCenter you want to be HA is managing the hosts it resides on - in this scenario the wizard configures your vCenter and deploys the Passive and Witness nodes for you.
Written by Sam McGeown on 6/4/2017
<img class=“size-thumbnail wp-image-8092 alignright” src=“/images/2017/04/echo.jpeg” alt=“” width=“150” height=“150” and having everything wake up for me is really cool. I already have a vRealize Orchestrator workflow to shutdown my workload cluster. What I want to do is trigger that by a voice command from Alexa. Now, the correct and proper thing to do here would be to create a new Alexa skill, write the function in Lambda and connect that to my Orchestrator REST API and execute the workflow.
Written by Sam McGeown on 14/3/2017
In this humble consultant’s opinion, Log Insight is one of the most useful tools in the administrator’s tool belt for troubleshooting vRealize Automation. I have lost count of the number of times I’ve been asked to help troubleshoot an issue that, when asked, people don’t know which log they should be looking at. The simple fact is that vRealize Automation has a lot of log files. Correlating these log sources to provide an overall picture is a painful, manual process - unless you have Log Insight!
Written by Sam McGeown on 8/2/2017
Published under Networking, NSX, VMware and vSphere
I’ve been holding off upgrading my lab to vSphere 6.5 because NSX 6.2.x doesn’t support it. With the release of NSX 6.3 and vSphere 6.5a, I can now upgrade. The sequence of the upgrade is slightly different to the generic one published by VMware because vSphere 6.5 isn’t supported with NSX 6.2. If follows that I need to upgrade NSX to 6.3 (which supports vSphere 6.0u2) before I can upgrade vSphere to 6.
Written by Sam McGeown on 31/1/2017
Published under Networking and VMware
Equal Cost Multipathing (ECMP), for the vSphere admin, is ability to create routes with an equal cost, which allows multiple paths to the same network to be created and traffic can be distributed over those paths. This is good for a couple of reasons - firstly is availability. If we were to lose a host, and an NSX Edge, the route will time out quicker than NSX Edge High Availability - thus providing higher availability for our network traffic.
Written by Sam McGeown on 30/12/2016
Published under VMware, vRealize Orchestrator and vSphere
My vSphere lab is split into two halves - a low power management cluster, powered by 3 Intel NUCs, and a more hefty workload cluster powered by a Dell C6100 chassis with 3 nodes. The workload servers are noisy and power hungry so they tend to be powered off when I am not using them, and since they live in my garage, I power them on and off remotely.
Written by Sam McGeown on 19/12/2016
One of the cool new features released with vRealize Automation 7.2 was the integration of VMware Admiral (container management) into the product, and recently VMware made version 1 of vSphere Integrated Containers generally available (GA), so I thought it was time I started playing around with the two. In this article I’m going to cover deploying VIC to my vSphere environment and then adding that host to the vRA 7.
Written by Sam McGeown on 16/12/2016
Published under VMware and vRealize Orchestrator
Back in January 2015 I wrote an article on how to modify the Java heap settings for the vCenter Orchestrator client when working with very large workflows. Since vRealize Orchestrator 7.x has been released, we no longer have an installable client, just a Java WebStart file (.jnlp) that you run, or a package that you can download - but nothing that installs. Note that none of this is official or supported by VMware as far as I know - it’s the results of my experimentation which has shown some performance improvement by increasing the configured memory pool.