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According your test I will try setup 2 mirrored VDEVs (1st for M$ Windows server and 2nd for Linux databases servers). If there is no IOPS penalty tradeoff it should be better in POV write amplification. Does it make sense?

One more thing I am thinking about. Is there any significant diiference between striped/mirrors of 4 SSDs and 2 mirrored VDEVs of 2 SSDs. Any advantafes related to IOPS or write amplification?

Thats insane. So I will try to stick to 16K volblocksize and will see how long wil SSD sustain such workload. Thank you for your thoughts.

Right I understand your opinions. I was thinking about 16K volblocksize for dataset where linux mysql databases will live, like you wrote. But what about Windows server dataset volblosize, does it make sense to set it bigger like 128K, IOPS will be worse there but I will get rid of write...

Hi I'm new in Proxmox VE, need your advice about "ZFS striped/mirror - volblocksize". I already read a lot in this forum about guest blocksize, volblocksize comparing performance IOPS, write amplification, padding parity overhead. But its related to RAIDZ setup, I will use 1 SSD for proxmox VE...