retentionAndShardFromPath will take the shard relative path and split it into the retention policy name and shard ID.

LoadIncremental loads multiple manifest files from a given directory.

BackupFilePattern is the beginning of the pattern for a backup file.

Metafile is the base name given to the metastore backups.

Suffix is a suffix added to the backup while it's in-process.

Entry contains the data information for a backed up shard.

Manifest lists the meta and shard file information contained in the backup.

MetaEntry contains the meta store information for a backup.