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That's BS and you know it, it's OpenZFS and the code from zfsonlinux was brought in, why the hell should someone do work on a Filesystem but just for one OS?

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Filesystem implementations are normally OS-specific because each kernel has different infrastructure for filesystems. e.g. Linux has the unified page cache, dentry cache etc, and ZFS just ignores all that and ships its own ARC and dnode caches, that then have to compete for shared system resources.

That's why SPL is such a nice feature, very little OS specific code. ZFS was ported in ~10 Days over to FreeBSD. And is (hopefully) in the near future THE open and "real" portable filesystem for Mac/Linux/BSD/Windows.

FreeBSD.org forums: "FreeBSD moving to ZFS-on-Linux"

https://forums.freebsd.org/threads/freebsd-moving-to-zfs-on-...

They took the zfsonlinux-code into OpenZFS, so OpenZFS is based on the zfsonLinux features and NOT the illumos (solaris) one:

https://openzfs.org/wiki/Main_Page

>The OpenZFS project brings together developers from the Linux, FreeBSD, illumos, MacOS, and Windows platforms. OpenZFS is supported by a wide range of companies.

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