Write binary header. (#5532)

2020-04-15 17:47:57 +08:00
parent 1b1969f20d
commit a2f54963b6
1 changed files with 2 additions and 1 deletions
--- a/src/learner.cc
+++ b/src/learner.cc
@@ -777,7 +777,8 @@ class LearnerIO : public LearnerConfiguration {
      }
      extra_attr.emplace_back("metrics", os.str());
    }
-
+    std::string header {"binf"};
+    fo->Write(header.data(), 4);
    fo->Write(&mparam, sizeof(LearnerModelParamLegacy));
    fo->Write(tparam_.objective);
    fo->Write(tparam_.booster);