Reclaim NetApp snapshot space

Recently I needed to configure big NFS share for HPC cluster users. Proposed use of this share is research data which rapidly changes and becomes obsolete very quickly. Primary storage on site is NetApp which by default reserves large portion (20%) of volume for snapshot. They are not practical for such usage scenario, so here is the quick tip on how to reclaim snapshot reserve for users usage.

snap sched volname 0 0 0
snapdelete -a volname
snapreserve volname 0

In first command we disable snapshot creation, then delete all already created snapshots and finally disable volume reservation for snapshots.

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