ReFS and Storage Spaces in virtual environment - ESXi / VMware vSphere

Solution 1:

  • Make sure you understand ReFS with checksumming enabled turns itself into log-structured file system, and this thing alone dramatically changes I/O pattern. TL;DR: Not all the workloads are OK with "safe" ReFS.

https://www.starwindsoftware.com/blog/log-structured-file-systems-microsoft-refs-v2-investigation-part-1

  • It's bad do layer one log on top of the other.

https://www.usenix.org/node/187064