Date: Tue, 12 Mar 2019 12:14:59 +0100 (CET) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: FreeBSD current <freebsd-current@freebsd.org> Subject: Re: ZFS no longer mounted in alphanumerical order Message-ID: <alpine.BSF.2.21.9999.1903121211370.315@mail.fig.ol.no> In-Reply-To: <97B0EDCF-355F-4600-8316-2B12473445A4@transactionware.com> References: <201903120012.x2C0CeeJ012446@gndrsh.dnsmgr.net> <e45bc5ab-af40-ad75-b5b2-8b0830aa915a@FreeBSD.org> <alpine.BSF.2.21.9999.1903121034570.315@mail.fig.ol.no> <97B0EDCF-355F-4600-8316-2B12473445A4@transactionware.com>
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On Tue, 12 Mar 2019 11:37+0100, Jan Martin Mikkelsen wrote:
> > On 12 Mar 2019, at 10:37, Trond Endrestøl <Trond.Endrestol@fagskolen.gjovik.no> wrote:
> > I concocted a shell script, it looks promising:
> >
> > #!/bin/sh
> > #-
> > # Parallel mounting of ZFS filesystems leaves a chaotic listing of
> > # mounted filesystems when viewed by df(1).
> > # Separating the header from the remaining lines and sorting the
> > # latter before recombining is a viable solution.
> > #-
> >
> > DF=/bin/df
> >
> > ${DF} ${@} | grep ^Filesystem
> > ${DF} ${@} | grep -v ^Filesystem | sort -k 6
> >
> > # new-df.sh
>
> An alternative sort approach, which handles df arguments which change the number of columns, and only invokes df once:
>
> ${DF} "$@" | awk '/^Filesystem/ { print; sort = "sort -k " NF } ! /^Filesystem/ { print | sort }’
Well, yes and no, mostly no.
Why are we feeding each line from df(1) separately to sort(1)?
It defeats the entire purpose. No sorting takes place.
We might be better off accumulating the majority of the lines and
sorting them in an END block.
--
Trond.
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Subject: Re: ZFS no longer mounted in alphanumerical order
To: =?UTF-8?Q?Trond_Endrest=c3=b8l?= <Trond.Endrestol@fagskolen.gjovik.no>,
FreeBSD current <freebsd-current@freebsd.org>
References: <201903120012.x2C0CeeJ012446@gndrsh.dnsmgr.net>
<e45bc5ab-af40-ad75-b5b2-8b0830aa915a@FreeBSD.org>
<alpine.BSF.2.21.9999.1903121034570.315@mail.fig.ol.no>
From: Andriy Gapon <avg@FreeBSD.org>
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On 12/03/2019 11:37, Trond Endrestøl wrote:
> # Parallel mounting of ZFS filesystems leaves a chaotic listing of
> # mounted filesystems when viewed by df(1).
df reports filesystems in the order they were mounted.
If you unmount and remount a filesystem or mount a new filesystem, you can see
it for yourself. Also, if you ever used fstab then you could see that too.
Just because previously the output happened to look like it was sorted does not
mean that it was or that there was such an intention.
--
Andriy Gapon
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