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I've got 2 sets of Intel 4510 3.84TB drives, a 2-drive zfs raid1 and a 4-drive zfs raid10. Running pveperf i get slower fsync results with the raid10. Is that expected? both pools are in the same server on the same controller and all drives are identical. root@pve2:~# pveperf...

Thanks for the fast response. Yes, the ZIL/SLOG write caching from the raidz2. The SSDs have a rated 1.2 PBW and the VMs I would have on there would only be lightweight app servers. I suppose I could have those VMs on the raidz2 pool instead so the only thing on the SSDs would be boot ZIL/SLOG.

I'm new to Proxmox and ZFS and have my first question. I have a 2u server with 2x 480Gb Intel Datacenter SSDs (s4510 w/PLP) and 6x 4TB SAS enterprise HDDs. The system has 128GB of RAM. I would like to set up the SSDs in a mirror for boot and VM storage. The 6x HDDs will be a raidz2 for larger...