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diff --git a/src/ceph/src/test/cli/osdmaptool/test-map-pgs.t b/src/ceph/src/test/cli/osdmaptool/test-map-pgs.t
new file mode 100644
index 0000000..d07f7a1
--- /dev/null
+++ b/src/ceph/src/test/cli/osdmaptool/test-map-pgs.t
@@ -0,0 +1,46 @@
+  $ NUM_OSDS=500
+  $ POOL_COUNT=1 # data + metadata + rbd
+  $ SIZE=3
+  $ PG_BITS=4
+#
+# create an osdmap with a few hundred devices and a realistic crushmap
+#
+  $ OSD_MAP="osdmap"
+  $ osdmaptool --osd_pool_default_size $SIZE --pg_bits $PG_BITS --createsimple $NUM_OSDS "$OSD_MAP" > /dev/null --with-default-pool
+  osdmaptool: osdmap file 'osdmap'
+  $ CRUSH_MAP="crushmap"
+  $ CEPH_ARGS="--debug-crush 0" crushtool --outfn "$CRUSH_MAP" --build --num_osds $NUM_OSDS node straw 10 rack straw 10 root straw 0
+  $ osdmaptool --import-crush "$CRUSH_MAP" "$OSD_MAP" > /dev/null
+  osdmaptool: osdmap file 'osdmap'
+  $ OUT="$TESTDIR/out"
+# 
+# --test-map-pgs
+#
+  $ osdmaptool --mark-up-in --test-map-pgs "$OSD_MAP" > "$OUT"
+  osdmaptool: osdmap file 'osdmap'
+  $ PG_NUM=$(($NUM_OSDS << $PG_BITS))
+  $ grep "pg_num $PG_NUM" "$OUT" || cat $OUT
+  pool 1 pg_num 8000
+  $ TOTAL=$((POOL_COUNT * $PG_NUM))
+  $ grep -E "size $SIZE[[:space:]]$TOTAL" $OUT || cat $OUT
+  size 3\t8000 (esc)
+  $ STATS_CRUSH=$(grep '^ avg ' "$OUT")
+# 
+# --test-map-pgs --test-random is expected to change nothing regarding the totals
+#
+  $ osdmaptool --mark-up-in --test-random --test-map-pgs "$OSD_MAP" > "$OUT"
+  osdmaptool: osdmap file 'osdmap'
+  $ PG_NUM=$(($NUM_OSDS << $PG_BITS))
+  $ grep "pg_num $PG_NUM" "$OUT" || cat $OUT
+  pool 1 pg_num 8000
+  $ TOTAL=$((POOL_COUNT * $PG_NUM))
+  $ grep -E "size $SIZE[[:space:]]$TOTAL" $OUT || cat $OUT
+  size 3\t8000 (esc)
+  $ STATS_RANDOM=$(grep '^ avg ' "$OUT")
+# it is almost impossible to get the same stats with random and crush
+# if they are, it most probably means something went wrong somewhere
+  $ test "$STATS_CRUSH" != "$STATS_RANDOM"
+#
+# cleanup
+#
+  $ rm -f "$CRUSH_MAP" "$OSD_MAP" "$OUT"