Hi all,
writing this post just for others to not run into the same issue like I had:
Scenario:
- running TrueNAS Scale on Proxmox host (Intel N100 based mini-PC)
- Setup as per recommendations with 12 GB RAM, 4 CPU, VirtIO SCSI
- Single Pool, compression and other highly demanding features off
Symptoms:
- When writing to SMB shares, CPU was going to 100%
- Write speed starting at 120MB/s and after few seconds going down to 50MB/s
Fix:
- Enabled IOMMU on Proxmox Host (Forum does not let me put a link, but you´ll find how)
- Change CPU Type of TrueNAS VM to “host” (was x86-64-v2-AES before)
Now I´m running at full speed with 30% CPU load