Date: Thu, 7 Mar 2013 13:23:13 +0200 From: George Kontostanos <gkontos.mail@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: Musings on ZFS Backup strategies Message-ID: <CA%2BdUSyoAyzHc%2BgKcUbaFH1=9tb04Un99ptXD0T=9tUBDyyURTw@mail.gmail.com> In-Reply-To: <5134D89E.3050004@gmail.com> References: <5130BA35.5060809@denninger.net> <5130EB8A.7060706@gmail.com> <2B318078-F863-4415-8DAE-94EE4431BF4C@ee.ryerson.ca> <5134C6C2.9020009@gmail.com> <1e4c24a68e76a279eaf4dc4f7c0156d3.squirrel@webmail.ee.ryerson.ca> <5134D89E.3050004@gmail.com>
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I have found that the use of mbuffer really speeds up the differential transfer process: #!/bin/sh export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin: pool="zroot" destination="tank" host="1.2.3.4" today=`date +"$type-%Y-%m-%d"` yesterday=`date -v -1d +"$type-%Y-%m-%d"` # create today snapshot snapshot_today="$pool@$today" # look for a snapshot with this name if zfs list -H -o name -t snapshot | sort | grep "$snapshot_today$" > /dev/null; then echo " snapshot, $snapshot_today, already exists" exit 1 else echo " taking todays snapshot, $snapshot_today" | sendmail root zfs snapshot -r $snapshot_today fi # look for yesterday snapshot snapshot_yesterday="$pool@$yesterday" if zfs list -H -o name -t snapshot | sort | grep "$snapshot_yesterday$" > /dev/null; then echo " yesterday snapshot, $snapshot_yesterday, exists lets proceed with backup" zfs send -R -i $snapshot_yesterday $snapshot_today | mbuffer -q -v 0 -s 128k -m 1G | ssh root@$host "mbuffer -s 128k -m 1G | zfs receive -Fd $destination" > /dev/null echo " backup complete destroying yesterday snapshot" | sendmail root zfs destroy -r $snapshot_yesterday echo "Backup done" | sendmail root exit 0 else echo " missing yesterday snapshot aborting, $snapshot_yesterday" exit 1 fi -- George Kontostanos --- http://www.aisecure.net
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