diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3bbabe..9b7506f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,8 @@ if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
     # Let's ensure -std=c++xx instead of -std=g++xx
     set(CMAKE_CXX_EXTENSIONS OFF)
 
+    set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG")
+
     # Let's nicely support folders in IDE's
     set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
@@ -46,14 +48,17 @@ find_package(Threads REQUIRED)
 # Boost
 find_package(Boost 1.75 REQUIRED)
 
+include(FetchContent)
+
+#
+# Boost
+find_package(Boost 1.75 REQUIRED)
+
 #
 #  Metall
 find_package(Metall QUIET)
-if (Metall_FOUND)
-    message(STATUS "Found Metall")
-else ()
-    message(STATUS "Could NOT find Metall locally. Download Metall.")
-    include(FetchContent)
+if (NOT Metall_FOUND)
+    set (JUST_INSTALL_HEADER TRUE)
     FetchContent_Declare(
             Metall
             GIT_REPOSITORY https://github.com/LLNL/metall.git
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 474346f..9229443 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -39,4 +39,4 @@ add_example(sort_string_edges)
 add_subdirectory(wordcounter)
 add_subdirectory(dataframe)
 add_subdirectory(mpi)
-add_subdirectory(ygm)
+add_subdirectory(ygm_wordcounter)
\ No newline at end of file
diff --git a/examples/mpi/CMakeLists.txt b/examples/mpi/CMakeLists.txt
index c061010..17a83b7 100644
--- a/examples/mpi/CMakeLists.txt
+++ b/examples/mpi/CMakeLists.txt
@@ -1,7 +1,7 @@
 if (MPI_CXX_FOUND)
-    add_example(mpi_ranks)
-    target_include_directories(mpi_ranks PUBLIC ${MPI_INCLUDE_PATH})
-    target_link_libraries(mpi_ranks PRIVATE MPI::MPI_CXX)
+    add_example(noop)
+    target_include_directories(noop PUBLIC ${MPI_INCLUDE_PATH})
+    target_link_libraries(noop PRIVATE MPI::MPI_CXX)
 else()
     message(STATUS "Will skip building the MPI examples")
 endif()
\ No newline at end of file
diff --git a/examples/mpi/noop.cpp b/examples/mpi/noop.cpp
new file mode 100644
index 0000000..a9f0d9f
--- /dev/null
+++ b/examples/mpi/noop.cpp
@@ -0,0 +1,33 @@
+// Copyright 2020 Lawrence Livermore National Security, LLC and other CLIPPy Project Developers.
+// See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: MIT
+
+#include <clippy/clippy.hpp>
+#include <string>
+#include <mpi.h>
+
+#ifndef MPI_VERSION
+#error "MPI_VERSION is not defined."
+#endif
+
+int main(int argc, char **argv) {
+
+  MPI_Init(&argc, &argv);
+  {
+    {
+      clippy::clippy clip("noop", "");
+      clip.returns<std::string>("Size");
+      if (clip.parse(argc, argv)) { return 0; }
+
+      int mpi_size;
+      MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+
+      clip.to_return(mpi_size);
+    }
+    MPI_Barrier(MPI_COMM_WORLD);
+  }
+  MPI_Finalize();
+
+  return 0;
+}
diff --git a/examples/ygm_wordcounter/CMakeLists.txt b/examples/ygm_wordcounter/CMakeLists.txt
new file mode 100644
index 0000000..7d729a0
--- /dev/null
+++ b/examples/ygm_wordcounter/CMakeLists.txt
@@ -0,0 +1,15 @@
+function(add_ygm_example example_name)
+    add_example(${example_name})
+    target_include_directories(${example_name} PUBLIC ${cereal_INCLUDE_DIR})
+    target_include_directories(${example_name} PUBLIC ${YGM_INCLUDE_DIR})
+    target_include_directories(${example_name} PUBLIC ${MPI_INCLUDE_PATH})
+    target_link_libraries(${example_name} PRIVATE MPI::MPI_CXX)
+endfunction()
+
+if (MPI_CXX_FOUND)
+    add_ygm_example(ygm_wordcount)
+    add_ygm_example(ygm_top_k_words)
+    add_ygm_example(ygm_noop)
+else()
+    message(STATUS "Will skip building the YGM examples")
+endif()
\ No newline at end of file
diff --git a/examples/ygm_wordcounter/count_table.hpp b/examples/ygm_wordcounter/count_table.hpp
new file mode 100644
index 0000000..204b5d7
--- /dev/null
+++ b/examples/ygm_wordcounter/count_table.hpp
@@ -0,0 +1,35 @@
+// Copyright 2020 Lawrence Livermore National Security, LLC and other CLIPPy Project Developers.
+// See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: MIT
+
+#ifndef CLIPPY_EXAMPLES_YGM_YGM_COUNT_TABLE_HPP_
+#define CLIPPY_EXAMPLES_YGM_YGM_COUNT_TABLE_HPP_
+
+#include <functional>
+#include <metall/container/string.hpp>
+#include <metall/container/unordered_map.hpp>
+#include <metall/container/scoped_allocator.hpp>
+#include <metall/utility/hash.hpp>
+#include <metall/utility/fallback_allocator_adaptor.hpp>
+
+namespace ygm_wordcount {
+namespace {
+namespace mc = metall::container;
+}
+
+template <typename T>
+using alloc_t = metall::manager::allocator_type<T>;
+
+template <typename T>
+using sc_alloc_t = mc::scoped_allocator_adaptor<alloc_t<T>>;
+
+using pmem_str_t = mc::basic_string<char, std::char_traits<char>, sc_alloc_t<char>>;
+using pmem_count_table = mc::unordered_map<pmem_str_t,
+                                           std::size_t,
+                                           metall::utility::string_hash<pmem_str_t, 12345>,
+                                           std::equal_to<>,
+                                           sc_alloc_t<std::pair<pmem_str_t, std::size_t>>>;
+}
+
+#endif //CLIPPY_EXAMPLES_YGM_YGM_COUNT_TABLE_HPP_
diff --git a/examples/ygm_wordcounter/ygm_noop.cpp b/examples/ygm_wordcounter/ygm_noop.cpp
new file mode 100644
index 0000000..86b14ee
--- /dev/null
+++ b/examples/ygm_wordcounter/ygm_noop.cpp
@@ -0,0 +1,20 @@
+// Copyright 2020 Lawrence Livermore National Security, LLC and other CLIPPy Project Developers.
+// See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: MIT
+
+#include <clippy/clippy.hpp>
+#include <ygm/comm.hpp>
+
+int main(int argc, char **argv) {
+  ygm::comm world(&argc, &argv);
+  {
+    clippy::clippy clip("noop", "No operation");
+    clip.returns<int>("#of ranks");
+    if (clip.parse(argc, argv)) { return 0; }
+    clip.to_return(world.size());
+  }
+  world.barrier();
+
+  return 0;
+}
diff --git a/examples/ygm_wordcounter/ygm_top_k_words.cpp b/examples/ygm_wordcounter/ygm_top_k_words.cpp
new file mode 100644
index 0000000..b954754
--- /dev/null
+++ b/examples/ygm_wordcounter/ygm_top_k_words.cpp
@@ -0,0 +1,83 @@
+// Copyright 2020 Lawrence Livermore National Security, LLC and other CLIPPy Project Developers.
+// See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: MIT
+
+#include <string>
+#include <queue>
+#include <vector>
+#include <utility>
+#include <clippy/clippy.hpp>
+#include <ygm/comm.hpp>
+#include <metall/utility/metall_mpi_adaptor.hpp>
+
+#include "count_table.hpp"
+
+using namespace ygm_wordcount;
+
+// The top one has the lowest count
+using que_type = std::priority_queue<std::pair<std::size_t, std::string>,
+                                     std::vector<std::pair<std::size_t, std::string>>,
+                                     std::greater<std::pair<std::size_t, std::string>>>;
+
+static int k = 0;
+
+int main(int argc, char **argv) {
+  ygm::comm world(&argc, &argv);
+
+  {
+    clippy::clippy clip("top_k_words", "Return the top k words");
+    clip.add_required<std::string>("path", "Data store path");
+    clip.add_required<int>("k", "k");
+    clip.returns<std::vector<std::string>>("Top k words");
+    if (clip.parse(argc, argv)) { return 0; }
+
+    const auto path = clip.get<std::string>("path") + "-" + std::to_string(world.rank());
+    k = clip.get<int>("k");
+
+    std::unique_ptr<metall::manager> manager;
+    manager = std::make_unique<metall::manager>(metall::open_read_only, path.c_str());
+    static const pmem_count_table *table = manager->find<pmem_count_table>(metall::unique_instance).first;
+
+    // Find the local top k words
+    que_type local_top_k_queue;
+    for (const auto &elem: *table) {
+      if (local_top_k_queue.size() < k || local_top_k_queue.top().first < elem.second) {
+        local_top_k_queue.emplace(elem.second, elem.first.c_str());
+      }
+      if (local_top_k_queue.size() > k) {
+        local_top_k_queue.pop();
+      }
+    }
+
+    // Find the global top k words
+    static que_type global_top_k_queue;
+    while (!local_top_k_queue.empty()) {
+      auto gather = [](auto pcomm, int from, const std::size_t count, const std::string &word) {
+        if (global_top_k_queue.size() < k || global_top_k_queue.top().first < count) {
+          global_top_k_queue.emplace(count, word);
+        }
+        if (global_top_k_queue.size() > k) {
+          global_top_k_queue.pop();
+        }
+      };
+      const auto &top = local_top_k_queue.top();
+      world.async(0, gather, top.first, top.second);
+      local_top_k_queue.pop();
+    }
+
+    world.barrier();
+
+    std::vector<std::string> top_k_words;
+    while (!global_top_k_queue.empty()) {
+      top_k_words.emplace_back(global_top_k_queue.top().second);
+      global_top_k_queue.pop();
+    }
+    std::reverse(top_k_words.begin(), top_k_words.end());
+    clip.to_return(top_k_words);
+    table = nullptr;
+  }
+  world.barrier();
+
+  return 0;
+}
diff --git a/examples/ygm_wordcounter/ygm_wordcount.cpp b/examples/ygm_wordcounter/ygm_wordcount.cpp
new file mode 100644
index 0000000..d665d90
--- /dev/null
+++ b/examples/ygm_wordcounter/ygm_wordcount.cpp
@@ -0,0 +1,66 @@
+// Copyright 2020 Lawrence Livermore National Security, LLC and other CLIPPy Project Developers.
+// See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: MIT
+
+#include <string>
+#include <functional>
+#include <fstream>
+
+#include <clippy/clippy.hpp>
+#include <ygm/comm.hpp>
+#include <metall/metall.hpp>
+
+#include "count_table.hpp"
+
+using namespace ygm_wordcount;
+
+int main(int argc, char **argv) {
+  ygm::comm world(&argc, &argv, 8 * 1024);
+
+  {
+    clippy::clippy clip("wordcount", "Distributed word count example");
+    clip.add_required<std::string>("path", "Data store path");
+    clip.add_required<std::vector<std::string>>("files", "Input word files");
+    clip.returns<std::size_t>("Total unique worlds");
+    if (clip.parse(argc, argv)) { return 0; }
+
+    const auto path = clip.get<std::string>("path") + "-" + std::to_string(world.rank());
+
+    std::unique_ptr<metall::manager> manager;
+    if (metall::manager::consistent(path.c_str())) {
+      manager = std::make_unique<metall::manager>(metall::open_only, path.c_str());
+    } else {
+      manager = std::make_unique<metall::manager>(metall::create_only, path.c_str());
+    }
+    static pmem_count_table *table = manager->find_or_construct<pmem_count_table>(metall::unique_instance)(manager->get_allocator());
+
+    const auto word_files = clip.get<std::vector<std::string>>("files");
+    for (int i = 0; i < word_files.size(); ++i) {
+      if (i % world.size() != world.rank()) continue;
+
+      std::ifstream ifs(word_files[i]);
+      std::string word;
+      while (ifs >> word) {
+        auto counter = [](auto pcomm, int from, const std::string &w) {
+          pmem_str_t tmp(w.c_str(), table->get_allocator());
+          if (table->count(tmp) == 0) {
+            table->emplace(std::move(tmp), 1);
+          } else {
+            table->at(tmp)++;
+          }
+        };
+        const int dest = metall::utility::string_hash<std::string, 321>{}(word) % world.size();
+        world.async(dest, counter, word);
+      }
+    }
+    world.barrier();
+
+    const auto total_words = world.all_reduce_sum(table->size());
+    clip.to_return(total_words);
+    table = nullptr;
+  }
+  world.barrier();
+
+  return 0;
+}