alt Hacker News>I just made a 4 x 24 TB ZFS pool
How much RAM did you install? Did you follow the 1GB per 1TB recommendation for ZFS? (i.e. 96GB of RAM)
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execution • today at 12:16 PM
I think you should be fine with 64GB (4x16GB ECC), I have 8x10TB RAID-Z2 and it uses around 34GB.
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That's only for ZFS deduplication which you should never enable unless you have very, very specific use cases.
For normal use, 2GB of RAM for that setup would be fine. But more RAM is more readily available cache, so more is better. It is certainly not even close to a requirement.
There is a lot of old, often repeated ZFS lore which has a kernel of truth but misleads people into thinking it's a requirement.
ECC is better, but not required. More RAM is better, not a requirement. L2ARC is better, not required.