1 files changed, 62 insertions, 0 deletions
diff --git a/src/test/crush/crush_weights.sh b/src/test/crush/crush_weights.sh
new file mode 100755
index 000000000..bf2bf8b0b
--- /dev/null
+++ b/src/test/crush/crush_weights.sh
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+source $(dirname $0)/../detect-build-env-vars.sh
+
+if [ `uname` = FreeBSD ]; then
+    SED=gsed
+else
+    SED=sed
+fi
+
+read -r -d '' cm <<'EOF'
+# devices
+device 0 device0
+device 1 device1
+device 2 device2
+device 3 device3
+device 4 device4
+# types
+type 0 osd
+type 1 domain
+type 2 pool
+# buckets
+domain root {
+    id -1        # do not change unnecessarily
+    # weight 5.000
+    alg straw2
+    hash 0    # rjenkins1
+    item device0 weight 10.0
+    item device1 weight 10.0
+    item device2 weight 10.0
+    item device3 weight 10.0
+    item device4 weight 1.000
+}
+# rules
+rule data {
+    ruleset 0
+    type replicated
+    min_size 1
+    max_size 10
+    step take root
+    step choose firstn 0 type osd
+    step emit
+}
+EOF
+
+three=($(echo "$cm" | crushtool -c /dev/fd/0 --test --show-utilization \
+                              --min-x 1 --max-x 1000000 --num-rep 3 | \
+  grep "device \(0\|4\)" | $SED -e 's/^.*stored : \([0-9]\+\).*$/\1/'))
+
+if test $(echo "scale=5; (10 - ${three[0]}/${three[1]}) < .75" | bc) = 1; then
+    echo 3 replicas weights better distributed than they should be. 1>&2
+    exit 1
+fi
+
+one=($(echo "$cm" | crushtool -c /dev/fd/0 --test --show-utilization \
+                              --min-x 1 --max-x 1000000 --num-rep 1 | \
+  grep "device \(0\|4\)" | $SED -e 's/^.*stored : \([0-9]\+\).*$/\1/'))
+
+if test $(echo "scale=5; (10 - ${one[0]}/${one[1]}) > .1 || (10 - ${one[0]}/${one[1]}) < -.1" | bc) = 1; then
+    echo 1 replica not distributed as they should be. 1>&2
+    exit 1
+fi