oh well if you want ZFS to ignore the fsync calls... you could disable sync and rely on txg_timeout (default 5s) to write your state to disk. Not recommended,

oh well if you want ZFS to ignore the fsync calls... you could disable sync and rely on txg_timeout (default 5s) to write your state to disk. Not recommended, but this is one of the things I tried (I tuned it to 1s to be slightly safer): https://vadosware.io/post/everything-ive-seen-on-optimizing-postgres-on-zfs-on-linux/#update-20211221-results-from-zfs_txg_timeout1syncdisabledlogbiaslatency https://vadosware.io/post/everything-ive-seen-on-optimizing-... But you probably want to be very sure that your desktop applications are somewhat safe with their data/can recover from crashes... TIL of libeatmydata[0], if you're comfortable using that, you'd probably be comfortable disabling fsync on the datasets for those apps. [0]: https://github.com/stewartsmith/libeatmydata https://github.com/stewartsmith/libeatmydata