DeleteBackup deletes backup with the given name from the current storage and pbm database.

DeleteBackupBefore deletes backups which are older than given time.

DeleteBackupFiles removes backup's artifacts from storage.

GetLastBackup returns last successfully finished backup (non-selective and non-external) or nil if there is no such backup yet.

nolint:nonamedreturns.

FilelistName is filename that is used to store list of files for physical backup.

see https://www.percona.com/blog/2021/06/07/experimental-feature-backupcursorextend-in-percona-server-for-mongodb/.

BackupMeta is a backup's metadata.

BackupRsNomination is used to choose (nominate and elect) nodes for the backup within a replica set.

Storage keeps storage configuration used during backup.

UUID represents a UUID as saved in MongoDB.

Filelist represents a list of files.