What is "autodelete_base" snapshot on aggr0 and how to disable it?

Hello colleagues,could anybody explain what is purpose of "autodelete_base" snapshot in aggr0 and how to remove it permanently?As I noticed, snap_autodelete is permanently turn ON in DOT 8.2.x 7mode. And only way, how to disable this snapshot is to set aggr snap reserve to 0.Is there any other solution? I noticed those only on single systems, HA pairs, but not on metrocluster gateway filer with syncmirror aggregates. Thanks in advance for feedback. RegardsPetr Jaros

The purpose of “Autodelete_base”  is : If Aggregate snapshot autodelete is leaving you with no snapshots, the storage system will automatically create a snapshot called autodelete_base at the aggregate level when a snapshot is removed as a result of autodeletion. This ensures that there is always a new snapshot in the aggregate after a snapshot is deleted.If aggregate snapshots are enabled and there is not adequate space reserved for these snapshots, a situation may develop where a very large aggregate snapshot is created. This may occur if large volumes are deleted.If SyncMirror triggers an aggregate level snapshot and there is not enough space for two snapshots, the existing snapshot is deleted by the autodeletion feature and instantly replaced by the autodelete_base snapshot. However, there is still not enough space for the SyncMirror triggered snapshot. This will cause a loop of autodeletion which can only be interrupted by manually deleting the autodelete_base snapshot.StepsDisable automatic aggregate Snapshot copy creation by entering the following command:aggr options aggr_name nosnap onaggr_name is the name of the aggregate for which you want to disable automatic Snapshot copy creation.Delete all Snapshot copies in the aggregate by entering the following command:snap delete -A -a aggr_nameSet the aggregate Snapshot reserve to 0 percent by entering the following command:snap reserve -A aggr_name 0

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