diff --git a/drop-caches b/drop-caches
new file mode 100755
index 0000000..c6f10e6
--- /dev/null
+++ b/drop-caches
@@ -0,0 +1,4 @@
+#!/bin/bash
+# Used by the mirroring user to refresh the nfs cache before doing a mirroring run.
+
+echo 3 >/proc/sys/vm/drop_caches