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I've looked into ZFS before for distributions like freenas, is there any solution on the horizon for the massive memory requirements?

For example, needing 8-16gb ram for something like a xTB home nas is high.

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The "massive memory requirements" only exist if you use data deduplication and care about write performance. Otherwise, ZFS does not require very much memory to run. It has a reputation to the contrary because ARC's memory usage is not shown as cache in the kernel's memory accounting, even though it is cache. This is in integration issue that would need to be addressed in Linus' tree.

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