From: Sage Weil <sage@inktank.com>
Date: Sat, 7 Dec 2013 00:18:04 +0000 (-0800)
Subject: crush/CrushCompiler: start with legacy tunables when compiling
X-Git-Tag: v0.74~20^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=4eb8891d8d390f201242eddfd41574d19dc7ae63;p=ceph.git

crush/CrushCompiler: start with legacy tunables when compiling

Ensure that a crush file always compiled deterministically, even though
the default values for *new* maps has changed.

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

diff --git a/src/crush/CrushCompiler.cc b/src/crush/CrushCompiler.cc
index 5f92bf7e4ecd..43ff2b1e8af6 100644
--- a/src/crush/CrushCompiler.cc
+++ b/src/crush/CrushCompiler.cc
@@ -728,6 +728,10 @@ int CrushCompiler::compile(istream& in, const char *infn)
   if (!infn)
     infn = "<input>";
 
+  // always start with legacy tunables, so that the compiled result of
+  // a given crush file is fixed for all time.
+  crush.set_tunables_legacy();
+
   string big;
   string str;
   int line = 1;