Category Archives: drs

vSAN/DRS awareness to be introduced in vSAN/vSphere 7.0!


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It was briefly mentioned here, but I figured I would elaborate on this new cool feature for vSAN Stretched Clusters which is DRS Awareness of vSAN Stretched Clusters. So what does this mean? Well, it is fairly straight forward. DRS will take vSAN resync traffic into consideration when the DRS algorithm runs. I can probably […] Continue reading

Posted in 7, 7.0, BC-DR, drs, Server, Software Defined, Storage, stretched cluster, Virtual SAN, VMware, VMware Cloud Foundation, vsan | Comments Off on vSAN/DRS awareness to be introduced in vSAN/vSphere 7.0!

vSphere 7 and DRS Scalable Shares, how are they calculated?


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I wrote a post and recorded a short demo that explained this cool new feature called Scalable Shares, part of vSphere 7 / DRS, last week. I didn’t want to go too deep in the post, but now that I am getting more questions about how this actually works, I figured I would provide some […] Continue reading

Posted in 7, 7.0, drs, scalable shares, Server, VMware, vSphere, vsphere 7 | Comments Off on vSphere 7 and DRS Scalable Shares, how are they calculated?

Introducing Scalable Shares – vSphere 7


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Early 2015 Frank Denneman and I had a discussion during a flight to San Francisco. We came up with this concept for Resource Pools where the number of shares would be determined by the number of VMs and the priority of the pool. In other words, we wanted to avoid the dilution of shares in […] Continue reading

Posted in drs, scalable shares, Server, vsphere 7 | Comments Off on Introducing Scalable Shares – vSphere 7

VMworld Reveals: DRS 2.0 (#HBI2880BY)


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At VMworld, various cool new technologies were previewed. In this series of articles, I will write about some of those previewed technologies. Unfortunately, I can’t cover them all as there are simply too many. This article is about DRS 2.0, which was session HBI2880BY. For those who want to see the session, you can find […]

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Posted in 2.0, drs, innovate, innovation, Server, tech preview, vmworld, vmworld reveals | Comments Off on VMworld Reveals: DRS 2.0 (#HBI2880BY)

DRS Advanced Setting IsClusterManaged


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On Reddit, someone asked what DRS advanced setting IsClusterManaged does and if it is even legit. I can confirm it is legit, it is a setting which was introduced to prevent customers from disabling DRS while the cluster is managed by vCloud Director for instance. As disabling DRS would lead to deleting resource pools for […]

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Posted in 6.5, 6.7, cloud, drs, u1, u2, vcd, vCloud Director, vSphere | Comments Off on DRS Advanced Setting IsClusterManaged

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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Posted in 6.7, clustering, clustering deep dive, deep dive, drs, ebook, ha, rubrik, Server, Various, vSphere | Comments Off on Black Friday Gift: Free copy of the vSphere 6.7 Clustering Deep Dive, thanks Rubrik (ebook)

HA Futures: Per VM Admission Control – Part 4 of 4 – (Please comment!)


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As admission control hasn’t evolved in the past years, we figured we would include another potential Admission Control change. Right now when you define admission control you do this cluster-wide. You can define you want to tolerate 1 failure for instance, but some VMs simply may be more important than other VMs. What do you […]

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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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