July 3, 20251 yr I've never really understood how and when IOPS and R/W speed matters, and thought I didn't have to care given that my use cases are quite simple: I want to use my NAS as backup target for my family's computers and to run a couple of lightweight containers – but also as primary storage for 20 years of photos and videos, somewhere around 95k in total.And I just read a blogpost that hinted at that for my photos – and browsing folders with a couple of hundred photos over SMB – IOPS is quite important for how snappy the experience is. I am currently getting started, and have only got 2x1TB NVMe for a mirrored zfs cache and 2x4TB HDD for a one-parity array while I'm learning the basics. My idea was to build out the array with one or two more 4 TB drives, which would cover my needs for a foreseeable future. But if IOPS matters for my photo editing, would it be better for me to either expand my cache pool (getting one or two more NVMes and rebuild it as a RaidZ1) or to get two 2.5" SDDs and add a second mirrored zfs pool for photo storage?
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