Hi Guys,
I had a conversation with my colleague this morning about formatting CSVs for a Hyper-V Failover Cluster. According to my personal knowledge, formatting a CSV by using NTFS was the way to go. I had some restricions for ReFS in my mind and this seemed to be correct for Windows Server 2016 at least:
"Always use NTFS for your Cluster Shared Volumes even though Hyper-V VMs are now supported on ReFS in Windows Server 2016. The only exception is when using Storage Spaces Direct in which case you should use ReFS. A big reason for using NTFS is that when using ReFS for Cluster Shared Volumes it always runs in file system redirection mode which means all I/O is sent over the cluster network to the coordinator node for the volume (this is why RDMA network adapters are recommended with Storage Spaces Direct for the cluster network) rather than nodes using Direct IO to access disks directly. Also remember that with Storage Spaces Direct there is no shared storage anyway so all access is essentially redirected."
Source: https://www.itprotoday.com/windows-8/ntfs-or-refs-cluster-shared-volumes-windows-server-2016 - But also seen in many other blogs.
But now I'm curious: Whilst finding so many smart blog entries to Server 2016 - I can't find any reliable source that is either reassuring or negating this statement for Windows Server 2019. There were improvements for both, ReFS and Hyper-V - so it sounds quite promising - yet i don't get any information regarding that CSV-topic.
Are there any experiences you'd like to share?
Carsten Brenner IT-Engineer at cloud4you GmbH (Germany)