rados: warn about losing user_version in cppool

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

diff --git a/src/tools/rados/rados.cc b/src/tools/rados/rados.cc
index a3962c6837fdc42f1a881f82763d86fbd6ccba01..a2ac644a6ff51da178c758d6e8ebd7e569820503 100644 (file)
--- a/src/tools/rados/rados.cc
+++ b/src/tools/rados/rados.cc
@@ -2616,6 +2616,8 @@ static int rados_tool_common(const std::map < std::string, std::string > &opts,
       goto out;
     }
 
+    cerr << "WARNING: pool copy does not preserve user_version, which some "
+        << "    apps may rely on." << std::endl;
     ret = do_copy_pool(rados, src_pool, target_pool);
     if (ret < 0) {
       cerr << "error copying pool " << src_pool << " => " << target_pool << ": "