ZFS doesn't require more RAM (or at least not meaningfully more), it just uses it if you have it. The RAM/ARC can be turned down in the configuration if you don't want it to do that. I think on Linux other filesystems just use the native Linux RAM cache instead(?), so it's basically the same thing as ARC, just less prominent? Also, doesn't ZFS have RAIDZ expansion now? Actually a lot of this article smells funny... probably because they just happen to know more about BTRFS. Doesn't BTRFS still have the RAID5/6 write hole? I wonder what sort of setup they're using if they're running it on a NAS.
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Sorry but this article is factually wrong in so many ways. It reads as someone wants to share his own experiences based on a not well researched background and wrote this down then.
The only valid point is that btrfs is natively integrated into Linux, all other points are either demonstrably wrong, blown out of proportion or usage opinions.
The comment section was pretty entertaining.
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I think people have forgotten what the point of a NAS is. Its for storage. You put files on it and don't ask it to do much else. You want it to be quick so it can efficiently serve files to other machines. ZFS is a solid choice for this use-case.
It might not be built-in to the kernel, but if it wasn't for the openZFS licence it probably would have been. And its not like its hard to install it.
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