Category Archives: Storage

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

Trigger APD on iSCSI LUN on vSphere


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I was testing various failure scenarios in my lab today for the vSphere Clustering Deepdive session I have scheduled for VMworld. I needed some screenshots and log files of when a datastore hit an APD scenario, for those who don’t know APD stands for all paths down. In other words: the storage is inaccessible and […]

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Posted in 6.0, 6.5, 6.7, apd, ha, High Availability, PDL, Server, Storage, VMware, vsphere ha | 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

22 / 23 May 2018 – VMware Technical Support Summit


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A while back I was asked if I could present at the VMware Technical Support Summit and last week I received the agenda. I forgot to blog about it so I figured I would share it with everyone. I was supposed to go to this event last year but I had a clash in my […]

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Posted in BC-DR, Data Recovery, gss, Management & Automation, Storage, summit, support, technical support, Various, Virtual SAN | Comments

vSAN Stretched Cluster: PFTT and SFTT what happens when a full site fails and multiple hosts fail?


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This question was asked on the VMTN community forum and it is a very valid question. Our documentation explains this scenario, but only to a certain level and it seems to be causing some confusion as we speak. To be honest, it is fairly complex to understand. Internally we had a discussion with engineering about […]

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Posted in pftt, Server, sftt, Software Defined, Storage, stretched cluster, Various, Virtual SAN, vsan | Comments