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diff --git a/src/mon/PGMonitor.h b/src/mon/PGMonitor.h
index 7b6d44f814fd2d191e9e778dc1133fb5fdf568e9..4da7c143840fc5ce19f0a6a13d209ec4f01a8a0b 100644 (file)
--- a/src/mon/PGMonitor.h
+++ b/src/mon/PGMonitor.h
@@ -12,6 +12,11 @@
  * 
  */
 
+/*
+ * Placement Group Monitor. Placement Groups are logical sets of objects
+ * that are replicated by the same set of devices.
+ */
+
 #ifndef __PGMONITOR_H
 #define __PGMONITOR_H