Building zfs-periodic-1.0.20130213.txz (origin /buildshare/ports/355755/sysutils/zfs-periodic) for powerpc-10-0 on XXX
slot1: created
x distfiles/
x distfiles/zfs-periodic-1.0.20130213.tar.gz
x packages/
x packages/pkg-1.2.7_2.txz
ELF ldconfig path: /lib /usr/lib /usr/lib/compat
Make depends
===>   zfs-periodic-1.0.20130213 depends on file: /usr/local/sbin/pkg - not found
===>    Verifying install for /usr/local/sbin/pkg in /buildshare/ports/355755/ports-mgmt/pkg
===>   Installing existing package /packages/pkg-1.2.7_2.txz
Installing pkg-1.2.7_2... done
If you are upgrading from the old package format, first run:

  # pkg2ng
===>   Returning to build of zfs-periodic-1.0.20130213
Make install
===>   zfs-periodic-1.0.20130213 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by zfs-periodic-1.0.20130213 for building
===>  Extracting for zfs-periodic-1.0.20130213
=> SHA256 Checksum OK for zfs-periodic-1.0.20130213.tar.gz.
===>  Patching for zfs-periodic-1.0.20130213
===>  Configuring for zfs-periodic-1.0.20130213
===>  Staging for zfs-periodic-1.0.20130213
===>   Generating temporary packing list
install  -o root -g wheel -m 555 /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/ross-zfs-periodic-9ffa662/etc/periodic/zfs-snapshot /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/stage/usr/local/bin
install  -o root -g wheel -m 555 /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/ross-zfs-periodic-9ffa662/etc/periodic/hourly/000.zfs-snapshot /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/stage/usr/local/etc/periodic/hourly/000.zfs-snapshot
install  -o root -g wheel -m 555 /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/ross-zfs-periodic-9ffa662/etc/periodic/daily/000.zfs-snapshot /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/stage/usr/local/etc/periodic/daily/000.zfs-snapshot
install  -o root -g wheel -m 555 /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/ross-zfs-periodic-9ffa662/etc/periodic/weekly/000.zfs-snapshot /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/stage/usr/local/etc/periodic/weekly/000.zfs-snapshot
install  -o root -g wheel -m 555 /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/ross-zfs-periodic-9ffa662/etc/periodic/monthly/000.zfs-snapshot /obj/buildshare/ports/355755/sysutils/zfs-periodic/work/stage/usr/local/etc/periodic/monthly/000.zfs-snapshot
====> Compressing man pages (compress-man)
===>  Installing for zfs-periodic-1.0.20130213
===>  Checking if sysutils/zfs-periodic already installed
===>   Registering installation for zfs-periodic-1.0.20130213
Installing zfs-periodic-1.0.20130213... done

In order to enable periodic snapshots you need
to add these lines to your /etc/periodic.conf

hourly_output="root"
hourly_show_success="NO"
hourly_show_info="YES"
hourly_show_badconfig="NO"
hourly_zfs_snapshot_enable="YES"
hourly_zfs_snapshot_pools="tank"
hourly_zfs_snapshot_keep=6
daily_zfs_snapshot_enable="YES"
daily_zfs_snapshot_pools="tank"
daily_zfs_snapshot_keep=7
weekly_zfs_snapshot_enable="YES"
weekly_zfs_snapshot_pools="tank"
weekly_zfs_snapshot_keep=5
monthly_zfs_snapshot_enable="YES"
monthly_zfs_snapshot_pools="tank"
monthly_zfs_snapshot_keep=2

To get hourly snapshots you also need to add
something like this to /etc/crontab:

2       *       *       *       *       root    periodic hourly

Make package
===>  Building package for zfs-periodic-1.0.20130213
slot1: removed