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When you stop backups for a replica set or sharded cluster Ops Manager stops taking new snapshots but retains existing snapshots until their listed expiration date.
If you later restart backups for replica set or cluster, Ops Manager might perform an inital sync, depending on how much time has elapsed.
If you terminate a backup, Ops Manager immediately deletes all the backup's snapshots.
Terminating a backup triggers a full backup
If you terminate a backup, Ops Manager immediately deletes the backup's snapshots. The next backup job runs as a full backup rather than an incremental backup.
If your attempt to terminate backups fails and you still need to terminate regardless of any errors, you can force terminate the backups.
If you wish to Force Terminate backups on a sharded cluster, you must repeat the following steps for each backup job on each shard or config server.
You should make sure that the Backup Job you want to terminate is in the Terminating state.