Date: Mon, 14 Mar 2011 09:37:25 +0100 From: Urankar Mikael <mikael.urankar@ujf-grenoble.fr> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: ZFSv28, zfs list behaviour and sysutils/freebsd-snapshot Message-ID: <20110314083725.GE47419@iut-mir-o.ujf-grenoble.fr> In-Reply-To: <alpine.BSF.2.00.1103140225100.90115@qvfongpu.qngnvk.ybpny> References: <20110310131710.GG96225@iut-mir-o.ujf-grenoble.fr> <alpine.BSF.2.00.1103140225100.90115@qvfongpu.qngnvk.ybpny>
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On Mon 14 March 2011 at 02:44:16AM -0400, J. Hellenthal wrote:
> On Thu, 10 Mar 2011 08:17, mikael.urankar@ wrote:
> >Hi,
> >
> >I'm using sysutils/freebsd-snapshot to make periodic ZFS backup snapshot
> >and this soft is broken since the upgrade of my pool to ZFSv28.
> >After some debugging it appears that "zfs list" behaviour has changed
> >with ZFSv28, and since freebsd-snapshot relies on "zfs list" to retrieve
> >the "ZFS file system name" from the "mountpoint name" the soft doesn't
> >work anymore.
> >
> >output of "zfs list" on a 8.2R amd64 (ZFSv15) :
> >zfs list /home/murankar
> >NAME USED AVAIL REFER MOUNTPOINT
> >tank/home/murankar 1.47M 1.59T 1.47M /home/murankar
> >
> >zfs list tank/home/murankar
> >NAME USED AVAIL REFER MOUNTPOINT
> >tank/home/murankar 1.47M 1.59T 1.47M /home/murankar
> >
> >on a 9-Current amd64 I've got no output for "zfs list /home/murankar"
> >and a exit code of 1
> >the output of "zfs list tank/home/murankar" is correct :
> >NAME USED AVAIL REFER MOUNTPOINT
> >tank/home/murankar 6,56G 286G 6,55G /home/murankar
>
> Looking at the output here I am hoping that this is not hand typed! the
> character ',' appears in this output which might fool a script into doing
> other things if it has not been avoided in the first place.
This is not hand typed and depends on the locale in use :
zfs list tank/home/murankar
NAME USED AVAIL REFER MOUNTPOINT
tank/home/murankar 6,65G 286G 6,58G /home/murankar
setenv LANG en_US.UTF8
zfs list tank/home/murankar
NAME USED AVAIL REFER MOUNTPOINT
tank/home/murankar 6.65G 286G 6.58G /home/murankar
freebsd-snapshot set LC_ALL and LANG to C
>
> If you have upgraded that machine to 9-CURRENT and have
> sysutils/zfsnap installed I would recommend deleting any snapshots
> that you have before it runs the snapshot scripts. This assumes that the
> snapshot script might have changed since you upgraded it and that the
> snapshot names are different. Better to be on the sane side.
>
> See UPDATING/20100929 for reference.
I've deleted all old snapshots before running the snapshot script, but
to not avail.
>
> # Correct syntax:
> zfs list pool/dataset1/dataset2
>
> # Incorrect syntax: ( I hope you were hand typing that and missed... )
> zfs list /dataset1/dataset2
In fact I was only doing by "hand" what freebsd-snapshot is doing.
See op_make() from /usr/local/sbin/snapshot (near line 285) :
# operate on filesystem
+ echo "XXX zfs list $fs_dir"
if [ ".$zfs_enabled" = .yes ] && (zfs list $fs_dir) >/dev/null 2>&1; then
/usr/local/sbin/snapshot make -g4 /var:test
XXX zfs list /var
>
> >
> >Is it the normal behaviour for ZFSv28 or some kind of regression ?
> >
>
> No its not normal, and some sort of regression possible. Though I usually
> take regression as performance issues as in speed.
>
> Also,
>
> pkg-descr
> freebsd-snapshot is a set of convenience front-end tools to mount(8)
> and mdconfig(8) for the management of UFS2 snapshots. It is
> also the under-lying tool used in the periodic snapshot
> scheduler periodic-snapshot(8) and the mounting/unmouning
> command in the amd(8) map /usr/local/etc/amd.map.snap. It
> provides the making, expiring, visiting, mounting and
> unmounting of filesystem snapshots.
>
> pkg-descr
> zfSnap is simple sh script to make rolling zfs snapshots with cron. Main
> advantage of zfSnap is that it's written in %100 pure /bin/sh, doesn't
> require any additional software to run, and is simple to use.
>
> zfSnap keeps all information about snapshot in snapshot name. zfs snapshot
> names are in form: Time-stamp--TTL where time-stamp is date and time of
> snapshot creation and TTL is Time To Live in human readable form.
>
>
> Did you happen to mix the above two up ? If so then rinse and repeat.
>
>
> Good luck,
>
Nope, freebsd-snapshot can handle ZFS snapshot and it uses to work fine
with ZFSv{14,15}, see the copyright notice :
FreeBSD UFS/ZFS Snapshot Management Environment, the pkg-descr file
seems outdated.
Thanks for your help.
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