Category Archives: vSphere

Part 1: Architect and Create Cloud Services Organizations for Skyline

In November of 2018, VMware Skyline became available as a VMware Cloud Service. The primary reason we enabled Skyline as a Cloud Services was to provide customer’s with greater control of their Skyline proactive findings and recommendations. This is pa… Continue reading

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How to test failure scenarios!


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Almost on a weekly basis, I get a question about unexpected results during the testing of certain failure scenarios. I usually ask first if there’s a diagram that shows the current configuration. The answer is usually no. Then I would ask if they have a failure testing matrix that describes the failures they are introducing, […]

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Posted in BC-DR, failure scenario, Server, Software Defined, Storage, test, testing, Virtual SAN, vmsc, VMware, vsan, vSphere | Comments Off on How to test failure scenarios!

VMware Skyline Update – February 2019

We’re back with our February VMware Skyline update. We didn’t release any major enhancements to Skyline this month, however we did add additional proactive findings, as well as updated our documentation to reflect recent changes. Let’s get started by r… Continue reading

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DQLEN changes, what is going on?


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I had a question this week on twitter, it was about the fact that DQLEN changes to values well below it was expected to be (30) in esxtop for a host. There was latency seen and experienced seen for VMs so the question was why is this happening and wouldn’t a lower DQLEN make things […]

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Changed advanced setting VSAN.ClomRepairDelay and upgrading to 6.7 u1? Read this…


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If you changed the advanced setting VSAN.ClomRepairDelay to anything else than the default 60 minutes there’s a caveat during the upgrade to 6.7 U1 you need to be aware of. When you do this upgrade the default is reset, meaning the value is configured once again to 60 minutes.  It was reported on twitter by “Justin […]

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Posted in 6.7, 6.7 u1, Server, Software Defined, Storage, update, Upgrade, Virtual SAN, vsan, vSphere | Comments Off on Changed advanced setting VSAN.ClomRepairDelay and upgrading to 6.7 u1? Read this…

HA Admission Control Policy: Dedicated Failover Hosts


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This week I received some questions on the topic of HA Admission Control. There was a customer that had a cluster configured with the dedicated failover host admission control policy and they had no clue why. This cluster had been around for a while and it was configured by a different admin, who had left […]

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Black Friday Gift: Free copy of the vSphere 6.7 Clustering Deep Dive, thanks Rubrik (ebook)


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Many asked us if the ebook would be made available for free again. Today I have the pleasure of announcing that Frank, Niels and I have worked once again with Rubrik and the VMUG organization to make the vSphere 6.7 Clustering Deep Dive book available for free! Yes, that is 0 USD / EURO, or […]

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HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)


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VMCP, or VM Component Protection, has been around for a while. Many of you are probably using this to mitigate storage issues. However, what if the VM network fails? Well, that is a problem right now… if the VM network fails then there’s no response from HA. This by many customers is considered to be […]

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HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)


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VMCP, or VM Component Protection, has been around for a while. Many of you are probably using this to mitigate storage issues. However, what if the VM network fails? Well, that is a problem right now… if the VM network fails then there’s no response from HA. This by many customers is considered to be […]

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HA Futures: Admission Control – Part 2 of 4 – (Please comment, feedback needed!)


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Admission Control is always a difficult topic when I talk to customers. It seems that many people still don’t fully grasp the concept, or simply misunderstand how it works. To be honest, I can’t blame them. It doesn’t always make sense when you think things through. Most recently for Admission Control we introduced a mechanism […]

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