Category Archives: stretched cluster

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

New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)


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I had many requests for an updated version of this paper, so the past couple of weeks I have been working hard. The paper was outdated as it was last updated around the vSphere 6.0 timeframe, and it was only a minor update. I looked at every single section and added in new statements and […]

New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, emc, metro, metro cluster, netapp, Storage, stretched, stretched cluster, vmsc, VMware, vplex, vSphere, vsphere metro storage cluster | Comments Off on New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)

Sizing a vSAN Stretched Cluster


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I have had this question a couple of times already, how many hosts do I need per site when the Primary FTT is set to 1 and the Secondary FTT is set to 1 and RAID-5 is used as the Failure Tolerance Method? The answer is straight forward, you have a local RAID-5 set locally […]

Sizing a vSAN Stretched Cluster” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.6, Server, sizing, Software Defined, Storage, stretched cluster, Virtual SAN, vsan | Comments Off on Sizing a vSAN Stretched Cluster

vSAN 6.6 Stretched Cluster Demo


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I had one more demo to finish and share and that is the vSAN 6.6 stretched cluster demo. I already did a stretched clustering demo when we initially released it, but with the enhanced functionality around local protection I figured I would re-record it. In this demo (~12 minutes) I will show you how to […]

vSAN 6.6 Stretched Cluster Demo” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.6, BC-DR, Server, Software Defined, Storage, stretched, stretched cluster, Virtual SAN, VMware, vsan, vSphere | Comments Off on vSAN 6.6 Stretched Cluster Demo

VMware vSAN 6.6 demo

Advertise here with BSAI was playing around with a vSAN 6.6 environment yesterday and I figured I would record a quick demo of some of the new functionality introduced. Took me a bit longer than expected, but here it is. I hope you will find it us… Continue reading

Posted in 6.6, BC-DR, demo, Server, Software Defined, Storage, stretched cluster, Virtual SAN, VMware, vsan | Comments Off on VMware vSAN 6.6 demo

vSAN needs 3 fault domains


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I have been having discussions with various customers about all sorts of highly available vSAN environments. Now that vSAN has been available for a couple of years customers are starting to become more and more comfortable around designing these infrastructures, which also leads to some interesting discussions. Many discussions these days are on the subject […]

vSAN needs 3 fault domains” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, cloud, fault domain, Software Defined, Storage, stretched cluster, Virtual SAN, vsan | Comments Off on vSAN needs 3 fault domains

Two host stretched vSAN cluster with Standard license?


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I was asked today if it was possible to create a 2 host stretched cluster using a vSAN Standard license or a ROBO Standard license. First of all, from a licensing point of view the EULA states you are allowed to do this with a Standard license: A Cluster containing exactly two Servers, commonly referred to […]

Two host stretched vSAN cluster with Standard license?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, 6.1, 6.2, 6.5, BC-DR, Server, Software Defined, Storage, stretched cluster, Virtual SAN, VMware, vsan, vSphere | Comments Off on Two host stretched vSAN cluster with Standard license?

How HA handles a VSAN Stretched Cluster Site Partition


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Over the past couple of weeks I have had some interesting questions from folks about different VSAN Stretched failure scenarios, in particular what happens during a VSAN Stretched Cluster site partition. These questions were in particular about site partitions and how HA and VSAN know which VMs to fail-over and which VMs to power-off. There […]

How HA handles a VSAN Stretched Cluster Site Partition” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in ha, Server, Software Defined, Storage, stretched cluster, Virtual SAN, vsan, vSphere | Comments Off on How HA handles a VSAN Stretched Cluster Site Partition

vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher


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I have discussed this topic a couple of times, and want to inform people about a recent change in recommendation. In the past when deploying a stretched cluster (vMSC) it was recommended by most storage vendors and by VMware to set Disk.AutoremoveOnPDL to 0. This basically disabled the feature that automatically removes LUNs which are […]

vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, BC-DR, Server, Storage, stretched cluster, u1, u2, vmsc, VMware, vSphere, vsphere metro storage cluster | Comments Off on vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher

Removing stretched VSAN configuration?


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I had a question today around how to safely remove a stretched VSAN configuration without putting any of the workloads in danger. This is fairly straight forward to be honest, there are 1 or 2 things though which are important. (For those wondering why you would want to do this, some customers played with this […]

Removing stretched VSAN configuration?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.1, BC-DR, Server, Software Defined, Storage, stretched, stretched cluster, Virtual SAN, VMware, vsan, vSphere | Comments Off on Removing stretched VSAN configuration?