diff --git a/make/travis.mk b/make/travis.mk
index 85f53ca32..0c9fd5b7d 100644
--- a/make/travis.mk
+++ b/make/travis.mk
@@ -31,4 +31,4 @@ LIBJVM=$(JAVA_HOME)/jre/lib/amd64/server
 #
 XGB_PLUGINS += plugin/example/plugin.mk
 XGB_PLUGINS += plugin/lz4/plugin.mk
-XGB_PLUGINS += plugin/dense_libsvm/plugin.mk
+XGB_PLUGINS += plugin/dense_parser/plugin.mk
diff --git a/src/data/data.cc b/src/data/data.cc
index 39fa260d1..cea87c09f 100644
--- a/src/data/data.cc
+++ b/src/data/data.cc
@@ -124,6 +124,14 @@ void MetaInfo::SetInfo(const char* key, const void* dptr, DataType dtype, size_t
     base_margin.resize(num);
     DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
                        std::copy(cast_dptr, cast_dptr + num, base_margin.begin()));
+  } else if (!std::strcmp(key, "group")) {
+    group_ptr.resize(num + 1);
+    DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
+                       std::copy(cast_dptr, cast_dptr + num, group_ptr.begin() + 1));
+    group_ptr[0] = 0;
+    for (size_t i = 1; i < group_ptr.size(); ++i) {
+      group_ptr[i] = group_ptr[i - 1] + group_ptr[i];
+    }
   }
 }
 
diff --git a/src/tree/param.h b/src/tree/param.h
index b6ac89aef..e9de3ac14 100644
--- a/src/tree/param.h
+++ b/src/tree/param.h
@@ -87,7 +87,7 @@ struct TrainParam : public dmlc::Parameter<TrainParam> {
         .describe("Subsample ratio of columns, resample on each tree construction.");
     DMLC_DECLARE_FIELD(opt_dense_col).set_range(0.0f, 1.0f).set_default(1.0f)
         .describe("EXP Param: speed optimization for dense column.");
-    DMLC_DECLARE_FIELD(sketch_eps).set_range(0.0f, 1.0f).set_default(0.1f)
+    DMLC_DECLARE_FIELD(sketch_eps).set_range(0.0f, 1.0f).set_default(0.03f)
         .describe("EXP Param: Sketch accuracy of approximate algorithm.");
     DMLC_DECLARE_FIELD(sketch_ratio).set_lower_bound(0.0f).set_default(2.0f)
         .describe("EXP Param: Sketch accuracy related parameter of approximate algorithm.");
diff --git a/src/tree/updater_histmaker.cc b/src/tree/updater_histmaker.cc
index 6af7c8117..fce76808a 100644
--- a/src/tree/updater_histmaker.cc
+++ b/src/tree/updater_histmaker.cc
@@ -871,7 +871,7 @@ class QuantileHistMaker: public HistMaker<TStats> {
   std::vector<common::WQuantileSketch<bst_float, bst_float> > sketchs;
 };
 
-XGBOOST_REGISTER_TREE_UPDATER(HistMaker, "grow_histmaker")
+XGBOOST_REGISTER_TREE_UPDATER(LocalHistMaker, "grow_local_histmaker")
 .describe("Tree constructor that uses approximate histogram construction.")
 .set_body([]() {
     return new CQHistMaker<GradStats>();
@@ -879,6 +879,12 @@ XGBOOST_REGISTER_TREE_UPDATER(HistMaker, "grow_histmaker")
 
 XGBOOST_REGISTER_TREE_UPDATER(GlobalHistMaker, "grow_global_histmaker")
 .describe("Tree constructor that uses approximate global proposal of histogram construction.")
+.set_body([]() {
+    return new GlobalProposalHistMaker<GradStats>();
+  });
+
+XGBOOST_REGISTER_TREE_UPDATER(HistMaker, "grow_histmaker")
+.describe("Tree constructor that uses approximate global of histogram construction.")
 .set_body([]() {
     return new GlobalProposalHistMaker<GradStats>();
   });