+ Note that not every file system supports the concept of inodes.
+ Moreover it is not possible to reliably detect whether this is
+ the case. Therefore this feature is disabled by default. It's
+ safe to enable it for ext3 file systems on linux though.
+
+ A value of zero (the default) deactivates this check.
+"
+
+option "keep-redundant" k
+#~~~~~~~~~~~~~~~~~~~~~~~~
+"Prune by disk space only"
+flag off
+details="
+ If this flag is not given dss removes redundant and outdated
+ snapshots automatically.
+
+ Otherwise, this feature is deactivated so that snapshots
+ are only being removed in case disk space or inode ratio
+ becomes low. Use this flag if the file system containing the
+ destination directory is used for snapshots only.