Introduce --min-complete.

[dss.git] / dss.ggo

diff --git a/dss.ggo b/dss.ggo
index 2f50474f638b82dfe266a73ccb1870958c437a2a..d8b956e7e276fb5b9e0d4da75dab1351e9afe852 100644 (file)
--- a/dss.ggo
+++ b/dss.ggo
@@ -439,3 +439,23 @@ details="
        becomes low. Use this flag if the file system containing the
        destination directory is used for snapshots only.
 "
+
+option "min-complete" -
+#~~~~~~~~~~~~~~~~~~~~~~
+"Minimal number of complete snapshots to keep"
+int typestr = "num"
+default = "1"
+optional
+details = "
+       This option is only relevant if snapshots must be deleted
+       because disk space gets low.
+
+       dss refuses to remove old snapshots if there are fewer complete
+       snapshots left than the given number. The default value of one
+       guarantees that at least one complete snapshot is available
+       at all times.
+
+       If only <num> complete snapshot are left, and there is not
+       enough disk space available for another snapshot, the program
+       terminates with a \"No space left on device\" error.
+"