Data Lifecycle Manager

automate creation, retention, copy and deletion of EBS snapshot

Trivia

• Only used for EBS.

• When you set both creation frequency to 7 days and retention period to 7 days in an AWS Data Lifecycle Manager (DLM) policy, only 1 snapshot is remained. Every 7 days, a new snapshot is created and the previous one is deleted.

  • Example:

Timeline with 7-day creation and 7-day retention:

Day 0:  Create Snapshot-1
Day 7:  Create Snapshot-2, Delete Snapshot-1
Day 14: Create Snapshot-3, Delete Snapshot-2  
Day 21: Create Snapshot-4, Delete Snapshot-3