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The Time Slider automatic snapshot tool automatically snapshots ZFS file systems and allows you to browse and recover snapshots of file systems.

This tool provides the following features:
* SMF snapshot service instances that schedule reoccurring snapshots
* Automatic snapshots are scheduled from the zfssnap crontab
* Older snapshots are removed based on a predefined percentage of file system space used
* Browse and recover files from snapshots by using the GNOME file manager

When the Time Slider tool is enabled, ZFS file system snapshots are created based on the following criteria:

{code}
frequent snapshots every 15 mins, keeping 4 snapshots
hourly snapshots every hour, keeping 24 snapshots
daily snapshots every day, keeping 31 snapshots
weekly snapshots every week, keeping 7 snapshots
monthly snapshots every month, keeping 12 snapshots
{code}
# {include:root_step}
# *Enable the Time Slider service, which is disabled by default.*
You can enable or disable these services from the command line or from the System->Preferences->Time Slider Setup menu. From this menu, you can also customize which ZFS file systems to snapshot and adjust the file system capacity setting for when snapshots are removed.
# *Review the default automatic snapshot service instances that are started when the Time Slider service is enabled.*
{code}
# svcs | grep auto-snapshot
online Oct_22 svc:/system/filesystem/zfs/auto-snapshot:frequent
online Oct_22 svc:/system/filesystem/zfs/auto-snapshot:hourly
online Oct_22 svc:/system/filesystem/zfs/auto-snapshot:weekly
online Oct_22 svc:/system/filesystem/zfs/auto-snapshot:monthly
online Oct_22 svc:/system/filesystem/zfs/auto-snapshot:daily
{code}
# *Confirm that automatic snapshots are created.*
For example:
{code}
# zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
rpool@zfs-auto-snap:weekly-2008-11-13-15:39 0 - 46.5K -
rpool@zfs-auto-snap:daily-2008-11-13-15:39 0 - 46.5K -
rpool@zfs-auto-snap:hourly-2008-11-13-15:39 0 - 46.5K -
rpool@zfs-auto-snap:frequent-2008-11-13-15:39 0 - 46.5K -
rpool/ROOT@zfs-auto-snap:weekly-2008-11-13-15:39 0 - 18K -
rpool/ROOT@zfs-auto-snap:daily-2008-11-13-15:39 0 - 18K -
rpool/ROOT@zfs-auto-snap:hourly-2008-11-13-15:39 0 - 18K -
rpool/ROOT@zfs-auto-snap:frequent-2008-11-13-15:39 0 - 18K -
.
.
.
{code}
# *Disable or enable specific automatic snapshot services for the top-level dataset and all descendant datasets from the command line.*
For example:
{code}
# zfs set com.sun:auto-snapshot=false rpool
# zfs set com.sun:auto-snapshot=true rpool/ROOT/opensolaris
{code}
# *Choose to only take snapshots under a given schedule for a dataset and all direct descendant datasets from the command line.*
For example:
{code}
# zfs set com.sun:auto-snapshot=false rpool/export
# zfs set com.sun:auto-snapshot:weekly=true rpool/export
{code}
# *Change the frequency of a given snapshot schedule from the command line.*
For example:
{code}
# svccfg -s svc:/system/filesystem/zfs/auto-snapshot:frequent setprop zfs/period = 30
# svccfg -s svc:/system/filesystem/zfs/auto-snapshot:frequent refresh
# svcadm restart svc:/system/filesystem/zfs/auto-snapshot:frequent
{code}
# *Disable automatic snapshot services for the swap and dump volumes, from the command line, if necessary.*
For example:
{code}
# zfs set com.sun:auto-snapshot=false rpool/dump
# zfs set com.sun:auto-snapshot=false rpool/swap
{code}
# *Remove a range of unwanted snapshots, from the command line, if necessary.*
For example, remove all automatic snapshots in the bash shell, as follows:
{code}
for s in `zfs list -H -o name -t snapshot | grep @zfs-auto-snap`;
do zfs destroy $s; done
{code}

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