Category Archives: drs

HA Admission control: How can I check how much reserved resources are used?


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I had this question twice in the past three months, so somehow this is something which isn’t clear to everyone. With HA Admission Control you set aside capacity for fail-over scenarios, this is capacity which is reserved. But of course VMs also use reservations, how can you see what the total combined used reserved capacity […]

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Posted in 6.0, 6.5, 6.7, admission control, BC-DR, Book, cloud, drs, ha, Server, u1, vSphere | Comments Off on HA Admission control: How can I check how much reserved resources are used?

VMworld Video: vSphere 6.7 Clustering Deep Dive


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As all videos are posted for VMworld (and nicely listed by William), I figured I would share the session Frank Denneman and I presented. It ended up in the Top 10 Sessions on Monday, which is always a great honor. We had a lot of positive feedback and comments, thanks for that! Most importantly, it […]

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Posted in BC-DR, clustering, Data Recovery, deep dive, drs, ha, Various, vmworld, vSphere | Comments Off on VMworld Video: vSphere 6.7 Clustering Deep Dive

All-Flash Stretched vSAN Cluster and VM/Host Rules


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I had a question last week about the need for DRS Rules or also known as VM/Host Rules in an All-Flash Stretched vSAN Infrastructure. In a vSAN Stretched Cluster, there is read locality implemented. The read locality functionality, in this case, ensures that: reads will always come from the local fault domain. This means that […]

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Now Available: vSphere 6.7 Clustering Deep Dive book!


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Posted in 6.7, BC-DR, Book, cloud, clustering deep dive, deep dive, deepdive, drs, ha, Storage, Various, Virtual SAN, VMware, vSphere | Comments Off on Now Available: vSphere 6.7 Clustering Deep Dive book!

Disable DRS for a VM


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I have been having discussions with a customer who needs to disable DRS on a particular VM. I have written about disabling DRS for a host in the past, but not for a VM, well I probably have at some point but that was years ago. The goal here is to ensure that DRS won’t […]

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The difference between an isolation and a partition with vSphere


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I have a lot of discussions with customers on the topic of stretched clusters, but also regular vSphere clusters. Something that often comes up is the discussion around what happens in an isolation or partition scenario. Fairly often customers (but also VMware employees) use those words interchangeably. However, a partition is not the same as […]

The difference between an isolation and a partition with vSphere” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Don’t know why DRS is not balancing your cluster? DRS Dump Insight!


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I was just reading up and noticed the DRS Dump Insight solution. It is a SaaS based DRS Dump Analyzer which gives you details around why your cluster is not balanced, or why certain recommendations are not made. Especially the “what if” scenarios are cool if you ask me. You can take a dump and […]

Don’t know why DRS is not balancing your cluster? DRS Dump Insight!” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in cool tool, drs, fling, Management & Automation, Server, Various, vSphere | Comments Off on Don’t know why DRS is not balancing your cluster? DRS Dump Insight!

How to disable DRS for a single host in the cluster


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I saw a question today which was interesting, how do I disable DRS for a single host in the cluster? I thought about it, and you cannot do this within the UI, at least… there is no “disable DRS” option on a host level. You can enable/disable it on a cluster level but that is […]

How to disable DRS for a single host in the cluster” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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vSphere 6.5 what’s new – DRS


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Most of us have been using DRS for the longest time. To be honest, not much has changed over the past years, sure there were some tweaks and minor changes but nothing huge. In 6.5 however there is a big feature introduced, but lets just list them all for completeness sake: Predictive DRS Network-Aware DRS […]

vSphere 6.5 what’s new – DRS” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, cloud, drs, Management & Automation, Server, Software Defined, VMware, vSphere, vsphere drs | Comments Off on vSphere 6.5 what’s new – DRS