Category: Vmware

Reboot or shut down vSAN node: Take your time!

While working at a customer’s site, I notice that a system administrator wanted to reboot a vSAN node. The time it took to shutdown the node was too long (30+ min) for the system administrator, so he used iDRAC to hard reset the host. I asked him, why he just didn’t wait until the host […]

Tuesday June 13th, 2017 in Vmware, vSAN | No Comments »

Migrating a datacenter with PowerCLI – Introduction

For the last few months, I have been working on a project to migrate 1000 virtual machines from one datacentre to another datacentre. Both datacentres are 50KM in distance from each other. The building where the source datacentre is situated, will be stripped and will be rebuild conform current standards. This means that every window, door, […]

Tuesday May 23rd, 2017 in PowerCLI, Vmware | No Comments »

Install VMware PSC fails: vdcsetupldu failed. Error [9234] – User invalid credentials

I was setting-up a redundant VMware PSC setup stretching 2 datacenters. Every datacenter has 2 PSC and an load balancer. Eventually, the virtual machines who run the PSC services, will run in a management cluster consisting of 3 nodes. These nodes are using Virtual SAN (VSAN) for storage. I first installed 1 node with VMware […]

Friday May 5th, 2017 in Vmware | No Comments »

Do IOPS matter?

I’ve been designing VMware vSphere clusters for the last 10 years know. And with every design, the storage part is one of the most challenging. A improper storage design, results in an poor virtual machine performance. Over the years, storage vendors added all kind of optimizations to their solution, in the form of cache. Almost […]

Friday June 17th, 2016 in Vmware | No Comments »

Determine your vSphere storage needs – Part 3: Availability, Security and Connectivity

  This is the last part about the mini series: Determine your vSphere storage needs. In this part, we’re going to cover 3 subjects: Availability Security Connectivity Although important, these aren’t the parts where you have many options. Availability When we talk availability in storage solution, where actually talking about high availability. Most (enterprise) storage […]

Tuesday February 16th, 2016 in Vmware | No Comments »

Determine your vSphere storage needs – Part2: Performance

Besides capacity, performance is probably one of the most important design factors. IOPS Latency The first step is to determine your performance needs in IOPS. This is probably the hardest part. In order to determine your IOPS needs, you have to know what type of virtual machines or applications, and there corresponding I/O characteristics your going […]

Wednesday January 20th, 2016 in Vmware | No Comments »

My VCDX journey

Friday 30 October 2015, 9:30 in the morning. I’m in the middle of a lesson talking about SRM and recovery plans, I see a popup on the top right of my screen: “VCDX Defense Results”. Me to my students: “Sorry, this is not what I normally do. But I have to check this email”. Michael […]

Wednesday November 4th, 2015 in Vmware | No Comments »

Determine your vSphere storage needs – Part 1: Capacity

Currently I’m working on a project where I have been asked to determine the storage requirements for a new storage solution. The customer is going to run a VMware vSphere 6 environment in a active-passive twin datacenter setup. As I was gathering the customer requirements I thought to write a blog post how this process […]

Wednesday September 16th, 2015 in Vmware | No Comments »

Silicon Valley Road Trip – Day 2

Today we had the pleasure to visit to other companies in Sillicon Valley, Nutanix and Pernixdata. Although these 2 companies cannot called an startup anymore they had quite some interesting stuff to show us. At Nutanix we had a 1 hour meeting with @stevenpoitrais (who wrote the Nutanix Bible). If you ever worked with Nutanix you […]

Sunday August 30th, 2015 in Vmware | No Comments »

Silicon Valley Road Trip – Day 1

On the 27 and 28 of august I’m having a road trip through Silicon Valley with fellow colleges @rutgerkoster @nielshagoort and @frankdenneman. These day where’re going to visit 4 startup companies who are so kind to spend a couple of hours on us to tell us there latest innovations. Yesterday we had the pleasure to […]

Friday August 28th, 2015 in Vmware | No Comments »