Totally outstanding disk performance

Good evening everyone. I'm implementing oVirt in my infrastructure using Ceph as Storage (I'm using 10 Gibabits interfaces), I managed to raise the Storage correctly, reaching rates of 1.2 Gigabytes per second via NFS. When I went to depoy the hosted-engine via NFS, everything went fine, but when I booted the first VM and tested the disk's performance, I got very low rates. Depending on how I'm writing to disk, I get rates of only 88 Megabytes per second, far below what was expected. Through FIO I get approximately 250 Megabytes per second, which is still quite low compared to what I can get via NFS on the same Host. I've already tried some Disk Cache configurations and tried to put CephFS as Storage Domain, but I always achieve the same rate, always with the IOPS quite low. Is there anything else I can do to try to improve these rates? Because I'm finding this quite weird considering how much data I can reach between the Host and Storage.
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murilo@evocorp.com.br