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How much RAM do you need for a Petabyte ZFS cluster? I investigated ZFS for my home server and it was recommended to have 1Gb RAM for every Tb, and much more i
by brokenmachine 10y ago
How much RAM do you need for a Petabyte ZFS cluster?
I investigated ZFS for my home server and it was recommended to have 1Gb RAM for every Tb, and much more if you enabled deduplication/compression (I forget which).
- olavgg 10y agoThe 1GB ram per TB is wrong. More memory definitely helps, especially if you add an L2ARC cache which can use a lot of memory just for mapping. But in most cases you are probably fine with just 1-2GB of ram. I would never use deduplication on ZFS, it is very slow even if you have enough RAM. And in most cases, savings are less than 10%.