Schedules for Volume Snapshots

Describes schedules for snapshots

About Schedule

A schedule to capture snapshots of volume data can be created and assigned to volumes.

Data Fabric provides predefined schedules that can be applied to volumes.

Predefined schedules are classified into three categories depending on the type of data in the volume you wish to back up with a snapshot.

You can select a pre-defined schedule for a volume,depending on the type of data that the volume contains.

If the volume data needs to be backed up very frequently as a snapshot, select the critical data schedule.

If it suffices to back up volume data less frequently, select the normal data schedule.

Table 1. Predefined-Schedules for Volume
Pre-defined Schedule Frequency and Retention Period Comments
Critical Data
  • Hourly - Retained for 24 hours
  • Daily at 12:00 AM - Retained for 7 days
  • Weekly every Sunday at 12:00 AM - Retained for 12 weeks
 Use for volumes with data that might be changing constantly and/or needs to be frequently backed up.

If you wish to preserve the snapshot beyond the default retention period per schedule, you can preserve the snapshot.

Important Data
  • Daily at 6:00 AM - Retained for 24 hours
  • Daily at 12:00 PM - Retained for 24 hours
  • Daily at 6:00 PM - Retained for 24 hours
  • Daily at 12:00 AM - Retained for 7 Days
  • Weekly every Sunday at 12:00 AM - Retained for 4 weeks
  • Monthly every first day of the month at 12:00 AM - Retained for 2 months
 Use for volumes containing data that needs to be backed up frequently during the day and week. If you wish to preserve the snapshot beyond the default retention period per schedule, you can preserve the snapshot.
Normal Data
  • Daily at 12:00 AM - Retained for 7 days
  • weekly every Sunday 12:00 AM - Retained for 4 weeks
  • Monthly every first day of the month at 12:00 AM - Retained for 2 months
 Use for volumes for volumes containing data that changes infrequently or does not need to be backed up frequently.

If you wish to preserve the snapshot beyond the default retention period per schedule, you can preserve the snapshot.

When you specify a snapshot schedule on a mirror volume, it specifies how often to take a snapshot of the mirror volume. This snapshot schedule is distinct from the snapshot schedule for the standard volume.

A snapshot schedule for a promotable mirror volume has two purposes:
  • The schedule specifies how often to take a snapshot of the mirror volume for the purpose of preserving the state of the mirror before a subsequent mirror operation. This way, if corrupt data is copied from the source volume's snapshot into the mirror volume, the mirror contents can be rolled back to the snapshot.

  • If the promotable mirror volume is promoted to a read-write volume, the snapshot schedule specified for the mirror is used for the promoted read-write volume. Once a mirror volume is promoted to a read-write volume, the mirror schedule is disabled.