Snapshots should be allow to easily go back in time.
As such, the following is offered by Solaris/OpenIndiana Time Slider:
| Name | Snapshot every | How many we kept? |
| frequent | 15 mins | 4 (=one hour) |
| hourly | hour | 24 (=one day) |
| daily | day | 31 (=one month) |
| weekly | week | 7 (=two months) |
| monthly | month | 12 (=a year) |
It would be a nice idea to implement this on Ysul.
References:
| rOPS Nasqueron Operations | |||
| D2906 | rOPS537a319f6313 Setup ZFS snapshots for home volumes | ||
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | dereckson | T1268 Reprovision Ysul | |||
| Resolved | dereckson | T1312 ZFS snapshots on devserver |
⚠ It's been experimentally manually configured on WindRiver through zfs-auto-snapshot.
New timetable
| Name | Snapshot every | How many we kept? | WindRiver config |
| frequent | 15 mins | 4 (=one hour) | 24 but each 5 minutes (=2 hours) |
| hourly | hour | 24 (=one day) | 48 (=2 days) |
| daily | day | 31 (=one month) | 14 (=1/2 month) |
| weekly | week | 7 (=two months) | 4 (= 1 month) |
| monthly | month | 12 (=a year) | >> |
Steps
We've so a drift between config and installed version.
It seems 3 things are needed:
SHELL=/bin/sh PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin # See crontab(5) for field format. */5 * * * * root /usr/local/sbin/zfs-auto-snapshot frequent 24 0 * * * * root /usr/local/sbin/zfs-auto-snapshot hourly 48 7 0 * * * root /usr/local/sbin/zfs-auto-snapshot daily 14 14 0 * * 7 root /usr/local/sbin/zfs-auto-snapshot weekly 4 28 0 1 * * root /usr/local/sbin/zfs-auto-snapshot monthly 12
$ zfs list | grep /usr/home/ | awk '{print "sudo zfs set com.sun:auto-snapshot=true " $1}' | sh