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How retention in SCE done for DAG

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Applies to

SnapCenter Plug-in for Exchange (SCE)

Answer

  • SnapCenter treats each SERVER\Database as a separate entity and applies retention accordingly
    • SERVER1\DB1 and SERVER2\DB1 are the same database but on different servers
    • SnapCenter will treat each as individual entities and keep retention separately for each database copy
    • If a database copy is active on SERVER1 and is then activated on SERVER2, retention will not be applied on SERVER1 until the next backup runs on SERVER1

Additional Information

Example -

  1. Retention is set to 3 days
  2. SERVER1\DB1 backs up between dates 1/1 - 1/4
  3. DB1 is moved to SERVER2
  4. SERVER2\DB1 backs up between dates 1/5 - 1/13
    1. Volume1 will contain snapshots dated 1/1 – 1/4 (3 days)
    2. Volume2 will contain snapshots dated 1/11 – 1/13 (3 days)
  5. DB1 is moved back to SERVER1
  6. SERVER1\DB1 is backed up on 4/13/2021
    1. Backups dated 4/2 – 4/4 are deleted (outside of 3 days)
    2. Retention is not applied to Volume2