Category Archives: vSphere

Insufficient configured resources to satisfy the desired vSphere HA failover level on the cluster


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I was talking to the HA team this week, specifically about the upcoming HA book. One thing they mentioned is that people still seem to struggle with the concept of admission control. This is the reason I wrote a whole chapter on it years ago, yet there still seems to be a lot of confusion. […]

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Posted in 6.5, 6.7, admission control, BC-DR, ha, Server, VMware, vSphere | Comments

vSphere 6.5 and limits, do they still apply to SvMotion?


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I had a question this week and I thought I wrote about this before but apparently, I did not. Hopefully by now most of you the I/O scheduler has changed over the past couple of years. Within ESXi, we moved to a new scheduler, which often is referred to as mClock. This new scheduler, and a […]

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Posted in 6.5, limit, mclock, scheduler, Server, sioc, Storage, Various, vSphere | Comments

Opvizor Performance Analyzer for vSAN


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At a VMUG a couple of months ago I bumped into my old friend Dennis Zimmer. Dennis told me that he was working on something cool for vSAN but couldn’t reveal what it was just yet. Last week I had a call with Dennis about what that thing was. Dennis is the CEO for Opvizor, […]

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Posted in Management & Automation, monitoring, opvizor, performance, Server, Software Defined, startup, Storage, Virtual SAN, vsan, vSphere | Comments

Adding a fifth (virtual) ESXi host to vCenter Foundation


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When running a 4 node stretched cluster environment it should be possible to use “cheaper” vCenter Server licenses, namely vCenter Foundation. One of the limitations of vCenter Foundation is that you can only manage 4 hosts with it. This is where some customers who wanted to manage a stretched cluster hit some issues. The issue […]

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Posted in 6.5, BC-DR, Server, Software Defined, Storage, u2, Virtual SAN, VMware, vsan, vSphere | Comments

Module MonitorLoop power on failed error when powering on VM on vSphere


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I was playing in the lab for our upcoming vSphere Clustering Deepdive book and I ran in to this error when powering on a VM. I had never seen it before myself, so I was kind of surprised when I figured out what it was referring to. The error message is the following: Module MonitorLoop […]

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Posted in 6.0, 6.5, 6.7, error, ESXi, Management & Automation, Server, Various, vSphere | Comments

Customer Experience Improvement Program: where, when and what?


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I got a question on my post about the Customer Experience Improvement Program (ceip) demo, the questions boiled down to the following: What is being send to VMware Where is the data stored by VMware When is the data send to VMware (how often) The “what” question was easy to answer, as this was documented […]

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Posted in 6.5, 6.7, ceip, Server, support, VMware, vsan, vSphere | Comments

How to simplify vSAN Support!


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Last week I presented at the Tech Support Summit in Cork with Cormac. Our session was about the evolution of vSAN, where are we today but more importantly which directly will we be going. One thing that struck me when I discussed vSAN Support Insight, the solution we announced not to long ago, is that […]

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Posted in BC-DR, gss, Management & Automation, Server, Software Defined, Storage, support, support insight, Various, Virtual SAN, VMware, vsan, vSphere | Comments

Instant Clone in vSphere 6.7 rocks!


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I wrote a blog post a while back about VMFork, which then afterwards got rebranded to Instant Clone. In the vSphere 6.7 release there has been a major change to the architecture of VMFork aka Instant Clone, so I figured I would do an update on the post. As an update doesn’t stand out from […]

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Posted in cloud, Desktop, devops, euc, instant clone, just in time desktop, project fargo, Server, Storage, vdi, vmfork, vSphere | Comments

vSphere 6.7 announced!


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It is that time of the year again, a new vSphere release announcement! (For those interested in what’s new for vSAN make sure to read my other post.) vSphere 6.7, what’s in a name / release? Well a bunch of stuff, and I am not going to address all of the new functionality as the […]

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Posted in 6.7, Management & Automation, Server, Storage, Various, VMware, vSphere, What's new | Comments

What’s new vSAN 6.7


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As most of you have seen, vSAN 6.7 just released together with vSphere 6.7. As such I figured it was time to write a “what’s new” article. There are a whole bunch of cool enhancements and new features, so let’s create a list of the new features first, and then look at them individually in […]

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Posted in 6.7, Server, Software Defined, Storage, Various, Virtual SAN, VMware, vsan, vsan 6.7, vSphere | Comments