On 20/03/2014 04:02, Harry Putnam wrote:
Probably some obvious thing going on here but I'm not see how find all
'.zfs' directories under a zfs system hierarchy.
Just running something like
cd /rmh/ (that is 'p2/rmh' in zpool talk)
find . -type d -name 'snapshot'
No hits whatsoever, when I know there are 4-5 under there.
I wanted to setup some homeboy snapshot destroys on the basis of mving
to all .zfs/snapshot directories and using ls -t, sed, zfs snapshot destroy to
get rid of snaps beyond the most recent 8 in the directory
So is something like 'zfs -H -t snapshot -o name' the only way to
ferret out actual addresses of the snaps?
I'd sooner use basic oldschool unix tools if possible
Our rolling snapshot script to be used in a cron,
adapt to your needs:
# ## usage 'roll_snapshot filesystem 8'
# cat roll_snapshot
#!/sbin/sh
root=`/sbin/mount | grep '^/ '|nawk '{print $3;}'`
fsys="$root"
if [ -n "$1" ] ; then
fsys=$1
fi
roll=3
if [ -n "$2" ] ; then
if (echo $2|grep '^[0-9]*$'>/dev/null); then
roll=$2
else
echo "$2 is not a number."
exit 1
fi
fi
if (zfs list $fsys >/dev/null) ; then
oldest=`zfs list -t snapshot| cut -d' ' -f1 | grep
$fsys'@[0-9]\{4,4\}-[0-1][0-9]-[0-3][0-9]_[0-2][0-9]:[0-5][0-9]:[0-6][0-9]'|sort
-r|tail +$roll`
if [ -n "$oldest" ] ; then
for z in $oldest; do zfs destroy $z ;done
fi
zfs snapshot $fsys@`date '+%F_%T`
else
echo "$fsys is not a ZFS filesystem, cannot snapshot."
exit 1
fi
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