zfs: the exponential file system from hell

Tue Oct 1 16:34:08 UTC 2013

On Sep 30, 2013, at 4:44 PM, kpneal at pobox.com wrote:

> Bottom line:
> The replacement for the 'df' command when using ZFS is 'zfs list'.

Given that we have the sources to df, I guess we should consider the question begged:  Do we want to change it to DTRT for zfs filesystems?  There's no Unix Law™ that says "df(1) must use the output of statfs(2) directly and can use no longer sources of information!"

At the end of the day, df(1) is just a convenient status reporting tool aimed at human consumption.  It could easily reach out to "zfs list" for the data it prints for zfs volumes if what's reported by statfs(2) just isn't suitable.

- Jordan