What’s Split Brain and how to avoid it like the plague?
Posted by Sergey Sanduliak on January 3, 2018
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In this article, we will discuss the split brain issue, and different approaches to prevent it from happening.

The situation when communication loss between the cluster nodes is caused by network connection problems is called network partition, which can lead to split brain. According to Wikipedia, split brain is a computer term, based on an analogy with the medical split-brain syndrome. It can be a real horror for a system administrator to handle the consequences of a split brain.

A split brain can happen if active nodes lose all synchronization and heartbeat connections between them at the same time and are not able to communicate anymore to define the synchronization state of the partner node. Split brain indicates data or availability inconsistencies originating from the maintenance of two separate data sets with overlap in scope.

split brain syndrome

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Hyper-V VMs on an NFS share on Windows Server 2016 – is that real?
Posted by Sergey Sanduliak on September 26, 2017
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A few years ago, we have tried to place a VM on an NFS share. We used Windows Server 2012 because Hyper-V is a native hypervisor from Microsoft.

Now we have decided to reproduce the experiment on Windows Server 2016. Just because of boundless curiosity 😊

So, we have 2 nodes: S3n11 serves as NFS Fileserver and S3n12 takes the Hyper-V server role.

We will do exactly the same thing as we did before, but this time on Windows Server 2016 on both VMs.

Let’s start!

Hyper-V VMs on an NFS share on Windows Server

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