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Nested Fault Domains on a 2-Node vSAN Stretched Cluster, is it supported?

Duncan Epping · Jun 20, 2022 · 2 Comments

I spotted a question this week on VMTN, the question was fairly basic, are nested fault domains supported on a 2-node vSAN Stretched Cluster? It sounds basic, but unfortunately, it is not documented anywhere, probably because stretched 2-node configurations are not very common. For those who don’t know, with a nested fault domain on a two-node cluster you basically provide an additional layer of resiliency by replicating an object within a host as well. A VM Storage Policy for a configuration like that will look as follows.

This however does mean that you would need to have a minimum of 3 fault domains within your host as well if you want to, this means that you will need to have a minimum of 3 disk groups in each of the two hosts as well. Or better said, when you configure Host Mirroring and then select the second option failures to tolerate the following list will show you the number of disk groups per host you need at a minimum:

  • Host Mirroring – 2 Node Cluster
    • No Data Redundancy – 1 disk group
    • 1 Failure – RAID1 – 3 disk groups
    • 1 Failure – RAID5 – 4 disk groups
    • 2 Failures – RAID1 – 5 disk groups
    • 2 Failures – RAID6 – 6 disk groups
    • 3 Failures – RAID1 – 7 disk groups

If you look at the list, you can imagine that if you need additional resiliency it will definitely come at a cost. But anyway, back to the question, is it supported when your 2-node configuration happens to be stretched across locations, and the answer is yes, VMware supports this.

Unexplored Territory 018: Not just artificially intelligent featuring Mazhar Memon

Duncan Epping · Jun 14, 2022 · Leave a Comment

In this week’s Unexplored Territory Podcast we have Mazhar Memon as a guest. We mainly talk about why Mazhar co-founded Bitfusion, what VMware’s strategy is for AI/ML workloads, and what we can expect from Project Radium in the future. Warning, this episode is DEEP! Listen to the full Unexplored Territory Podcast episode via Spotify – https://spoti.fi/3QdnXlX , Apple – https://apple.co/3O7TsMj , your favorite podcast app, or the embedded player below!

Unexplored Territory 017 – A day in the life of a CTO with Joe Baguley

Duncan Epping · Jun 2, 2022 · Leave a Comment

In this week’s Unexplored Territory Podcast we VMware’s CTO Joe Baguley as a guest. We talk about various topics like how Joe became the CTO of VMware, what the McLaren announcement means, why Joe is passionate about ESG, Dirk Gently’s Holistic Detective Agency, and much much more. Listen to the full Unexplored Territory Podcast episode via Spotify (https://spoti.fi/3ajyyuS), Apple (https://apple.co/3zazXyj), your favorite podcast app, or the embedded player below!

VMUG Advantage Homelab Group Buy Discount offer 2022!

Duncan Epping · Jun 1, 2022 · 2 Comments

Yes, here we go again, the VMUG Advantage Homelab Group Buy Discount offer is available again! I’ve had multiple folks asking throughout the year if I had a code, and unfortunately I don’t have codes to distribute, but I do know that if you fill out this survey, you will get access to a code. The minimum discount you get is 12% and this can go up to 15% when the number of participant goes above 300. What do you get when you sign up and buy a 12 months subscription?

  • 365-day Evaluation Licenses
    • Including vSphere, vCloud Foundation, vSAN, NSX, vRealize, Workstation, Horizon, and more!
  • 20-35% discount on training
  • Access to “test drive“
  • Advantage members receive a $ 100 USD VMware Explore discount (not stackable)

The VMUG Advantage Program comes at a cost of 200 USD. Last year the discount was 15%, which means the price ended up being 170 USD for a full year. If you have just one training course planned per year, the VMUG Advantage Program will have already paid for itself (20% discount on a 3000+ USD training course). Yes, I have been talking about USD so far, but of course, this offer is available to all our community members globally (Europe, APJ, Africa, Middle East, etc). Now, again, the discount percentage you get will depend on the number of people signing up for this year’s promotion. The ranges look as follows:

Quantity Discount Cost
1-199 12% $176
200-299 14% $172
300+ 15% $170

If more than 1000 people sign up, VMUG HQ will also do a raffle and give away some cool VMUG Advantage “swag”. Can’t wait? Sign up for the discount code here, and join the program!

Where do I download the vSAN File Service OVA?

Duncan Epping · May 25, 2022 · Leave a Comment

Last few weeks I had this question at least three times, surprisingly as I thought it wasn’t too difficult to find. The question was if my vCenter Server has no connection to the internet, where do I download the vSAN File Service OVA file that I can use to setup vSAN File Service manually? The UI provides the option to manually load it, but doesn’t provide a pointer to the location on the website where you can download it.

And actually, it is fairly simple, you go to vmware.com/downloads. You pick “VMware vSAN” as the product, then click on the “Drivers & Tools” tab, and then unfold “VMware vSAN Tools, Plug-ins and Appliances” and you should see the OVAs listed for the various versions. After you download the OVA, you can simply upload it from your desktop via the vCenter Server UI and continue the configuration of vSAN File Service.

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About the author

Duncan Epping is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is a VCDX (# 007), the author of the "vSAN Deep Dive", the “vSphere Clustering Technical Deep Dive” series, and the host of the "Unexplored Territory" podcast.

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29-08-2022 – VMware Explore US
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