crush: set default tunables to jewel

For new clusters.

This is the last "disruptive" tunable change we've made (where adjusting/
fixing it requires lots of data movement).  For new clusters a lower bound
of jewel seems pretty reasonable, and this has been upstream in Linux
for a while now.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/crush/CrushWrapper.h b/src/crush/CrushWrapper.h
index 41e4de3a881aa9f4b86ff2bb3d4bf7e353bbf14b..baf5ceba13f6f9a2b323643fe681cf7daa885f18 100644 (file)
--- a/src/crush/CrushWrapper.h
+++ b/src/crush/CrushWrapper.h
@@ -169,7 +169,7 @@ public:
     crush->straw_calc_version = 1;
   }
   void set_tunables_default() {
-    set_tunables_hammer();
+    set_tunables_jewel();
     crush->straw_calc_version = 1;
   }