Hi !

I run a series of benchmarks with IOZONE testing performance of
different RAID configurations on HP ProLiant DL380 + impact of NFS loopback.

NFS loopback is necessary even for very small systems (e.g. just 2

AFAIK NFS loopback is still considered a bad practice and it's still strongly recommended against since it could lead to deadlock and data loss.
See https://access.redhat.com/solutions/22231

I'd strongly recommend a single node hyper-converged gluster over that.

nodes), since oVirt local storage setup is limited to single (only one)
node per data center and this is quite useless from the point of view of
functionality.

Full article:
http://www.vacuum-tube.eu/wp/?p=537

Short YouTube slide show:
https://www.youtube.com/watch?v=Xw_VN9G8jSI

Related video:
Moving away from local storage setup to NFS/GlusterFS
https://www.youtube.com/watch?v=2ebhZ5U6x_Y
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