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Snapshot scheduling allows cluster administrators to automatically generate snapshots according to a pre-defined itinerary. OneFS snapshot schedules can be configured at daily, weekly, monthly, or yearly intervals, with single or multiple job frequency per schedule, and down to a per-minute granularity. OneFS snapshot schedules can be configured from either the CLI or the WebUI.
Similarly, automatic snapshot deletion can be configured per defined schedule at an hourly-through-yearly range.
The following table provides a recommended snapshot schedule for both ordered and unordered deletion configurations:
Deletion Type | Snapshot Frequency | Snapshot Time | Snapshot Expiration | Max Retained Snapshots |
Ordered deletion (for mostly static data) | Every four hours | Start at 12:00AM End at 11:59AM | 1 month | 180 |
Unordered deletion (for frequently modified data) | Every other hour | Start at 12:00AM End at 11:59AM | 1 day | 27 |
Every day | At 12:00AM | 1 week | ||
Every week | Saturday at 12:00AM | 1 month | ||
Every month | First Saturday of the month at 12:00AM | 3 months |
A snapshot schedule cannot span multiple days. For example, you cannot specify to begin generating snapshots at 5:00 PM Monday and end at 5:00 AM Tuesday. To continuously generate snapshots for a period greater than a day, two individual snapshot schedules are required.
In order to generate snapshots from 5:00 PM Monday to 5:00 AM Tuesday, for example, create one schedule that generates snapshots from 5:00 PM to 11:59 PM on Monday, and another schedule that generates snapshots from 12:00 AM to 5:00 AM on Tuesday.